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Date Code 20010625 

Setting Negative-Sequence Overcurrent Elements 

F-1 

 

SEL-311L Instruction Manual 

APPENDIX F:   SETTING NEGATIVE-SEQUENCE 

OVERCURRENT ELEMENTS 

S

ETTING 

N

EGATIVE

-S

EQUENCE 

D

EFINITE

-T

IME 

O

VERCURRENT 

E

LEMENTS

 

Negative-sequence instantaneous overcurrent elements 50Q1 through 50Q4 and 67Q1 
through 67Q4 should not be set to trip directly

.  This is because negative-sequence current 

can transiently appear when a circuit breaker is closed and balanced load current suddenly 
appears. 

To avoid tripping for this transient condition, use negative-sequence definite-time overcurrent 
elements 67Q1T through 67Q4T with at least 1.5 cycles of time delay (transient condition lasts 
less than 1.5 cycles).  For example, make time delay setting: 

 

67Q1D = 1.50 

for negative-sequence definite-time overcurrent element 67Q1T.  Refer to Figure 3.46 for more 
information on negative-sequence instantaneous and definite-time overcurrent elements. 

Continue reading in 

Coordinating Negative-Sequence Overcurrent Elements

 in this appendix 

for guidelines on coordinating negative-sequence definite-time overcurrent elements and a 
following coordination example.  The coordination example uses time-overcurrent elements, but 
the same principles can be applied to definite-time overcurrent elements. 

S

ETTING 

N

EGATIVE

-S

EQUENCE 

T

IME

-O

VERCURRENT 

E

LEMENTS

 

Negative-sequence time-overcurrent element 51QT should not be set to trip directly when it 
is set with a low time-dial setting

 

51QTD,

 

that results in curve times below 3 cycles

 (see 

curves in Figures 9.1 through 9.10 in

 Section 9:  Setting the Relay

).  This is because negative-

sequence current can transiently appear when a circuit breaker is closed and balanced load 
current suddenly appears.  Refer to Figure 3.49 for more information on negative-sequence time-
overcurrent element 51QT. 

To avoid having negative-sequence time-overcurrent element 51QT with such low time dial 
settings trip for this transient negative-sequence current condition, make settings similar to the 
following: 

 

 

SV6PU = 1.50 cycles 

(minimum response time; transient condition lasts 
less than 1.5 cycles) 

 

 

SV6 = 51Q 

(run pickup of negative-sequence time-overcurrent 
element 51QT through SEL

OGIC

 control equation 

variable timer SV6) 

 

 

TR = … + 51QT * SV6T + … 

(trip conditions; SV6T is the output of the SEL

OGIC

 

control equation variable timer SV6) 

Summary of Contents for SEL-311L

Page 1: ...EL 311L LINE CURRENT DIFFERENTIAL PROTECTION AND AUTOMATION SYSTEM INSTRUCTION MANUAL SCHWEITZER ENGINEERING LABORATORIES 2350 NE HOPKINS COURT PULLMAN WA USA 99163 5603 TEL 509 332 1890 FAX 509 332 7990 ...

Page 2: ... changés pour des mots de passe confidentiels Dans le cas contraire un accès non autorisé à l équipement pourrait être possible SEL décline toute responsabilité pour tout dommage résultant de cet accès non autorisé DANGER Removal of this front panel exposes circuitry which may cause electrical shock that can result in injury or death DANGER Le retrait du panneau avant expose à la circuiterie qui p...

Page 3: ...orded in this Summary of Revisions table 20011112 Section 1 Updated Optoisolated Input Ratings information in Relay Specifications Corrected references to figures in Section 3 in Relay Element Settings Ranges and Accuracies Section 2 Updated table SEL 311L Relay Line Current Differential Electrical Interface Cable Application Section 3 Added OPO Open Pole Option 52 27 Corrected ETAP setting indica...

Page 4: ...t local control bits operation Internal changes to correct SELOGIC TR setting for 87L21 application Internal changes to correct counter overflow in INT87 board Appendix B Added note about the self extracting Zip file to step 7 20011017 Added new Appendix K SEL 5030 ACSELERATOR 20010820 Appendix A Internal changes to improve EIA 422 clock detection 20010717 Appendix A Internal changes to correct un...

Page 5: ...T DIFFERENTIAL COMMUNICATIONS AND SERIAL PORT COMMUNICATIONS AND COMMANDS SECTION 11 FRONT PANEL INTERFACE SECTION 12 STANDARD EVENT REPORTS AND SER SECTION 13 TESTING TROUBLESHOOTING AND COMMISSIONING SECTION 14 APPLICATION SETTINGS FOR SEL 311L RELAYS SECTION 15 APPENDICES Appendix A Firmware Versions Appendix B Firmware Upgrade Instructions Appendix C SEL Distributed Port Switch Protocol Append...

Page 6: ......

Page 7: ...ns 1 10 General Specifications 1 10 Processing Specifications 1 13 Relay Element Settings Ranges and Accuracies 1 14 FIGURES Figure 1 1 Typical Two Terminal Application With Hot Standby Channel and Tapped Load 1 5 Figure 1 2 Typical Two Terminal Application With Voltage Inputs 1 6 Figure 1 3 Typical Three Terminal Application With Optional Third Communications Channel 1 6 Figure 1 4 SEL 311L Relay...

Page 8: ......

Page 9: ...om those used for backup protection and control A failure in the line current differential hardware does not impact backup protection This section includes the following overviews of the SEL 311L Relay SEL 311L Relay Models Instruction Manual Sections Applications AC DC Connections Communications Ports Communications Connections Relay Specifications SEL 311L RELAY MODELS The SEL 311L Relay has the...

Page 10: ...ion 3 Line Current Differential Distance Out of Step Overcurrent Voltage Synchronism Check and Frequency Elements describes the operation of Line current differential elements phase negative sequence and zero sequence Phase and ground distance elements phase mho compensator distance ground mho quadrilateral ground and Zone 1 extension Out of step elements Instantaneous definite time overcurrent el...

Page 11: ...control switches local bit outputs LB1 through LB16 Remote control switches remote bit outputs RB1 through RB16 Latch control switches latch bit outputs LT1 through LT16 Multiple setting groups six available Programmable timers timer outputs SV1T through SV16T Rotating default displays and display points Section 8 Breaker Monitor and Metering Functions describes the operation of Breaker monitor St...

Page 12: ...s See SHO Command Show View Settings in Section 10 for a list of the SEL 311L Relay factory default relay settings Section 11 Front Panel Interface describes the operation of Pushbuttons and correspondence to serial port commands Local control switches local bit outputs LB1 through LB16 Rotating default displays and display points Section 12 Standard Event Reports and SER describes Standard 15 30 ...

Page 13: ...x H Distributed Network Protocol DNP 3 00 Level 2 Appendix I MIRRORED BITS Communications Appendix J Example Calculations for 87L Settings The SEL 311L Relay Command Summary briefly describes the serial port commands that are described in detail in Section 10 Current Differential Communications and Serial Port Communications and Commands APPLICATIONS DWG M311L003a Dedicated Fiber 850 nm multimode ...

Page 14: ...L SEL 311L CH X 87L SEL 311L CH X Teleprotection Equipment Dedicated Fiber 850 nm multimode PC37 94 or 1300 nm Figure 1 2 Typical Two Terminal Application With Voltage Inputs DWG M311L006a 87L 87L 87L Optional SEL 311L CH X CH Y SEL 311L CH X CH Y SEL 311L CH X CH Y Figure 1 3 Typical Three Terminal Application With Optional Third Communications Channel ...

Page 15: ... Instruction Manual AC DC CONNECTIONS Figure 1 4 and Figure 1 5 show general connection points See General Specifications later in this section and Section 2 Installation for more information on hardware and connections Figure 1 4 SEL 311L Relay Inputs and Outputs ...

Page 16: ...1 8 Introduction and Specifications Date Code 20011112 SEL 311L Instruction Manual Figure 1 5 SEL 311L Relay Communications Interfaces ...

Page 17: ...NNECTIONS FOR CONTROL CONFIGURATION AND INTERROGATION See Port Connector and Communications Cables in Section 10 Current Differential Communications and Serial Port Communications and Commands for more communications connection information Figure 1 6 SEL 311L Relay Communications Connections Examples ...

Page 18: ...A 2 51 VA 15 A 1 A nominal 3 A continuous linear to 20 A symmetrical 100 A for 1 second 250 A for 1 cycle Burden 0 13 VA 1 A 1 31 VA 3 A AC Voltage Inputs 67 VL N three phase four wire connection 150 VL N continuous connect any voltage up to 150 Vac 365 Vac for 10 seconds Burden 0 13 VA 67 V 0 45 VA 120 V Power Supply 125 250 Vdc or Vac Range 85 350 Vdc or 85 264 Vac Burden 15 W 24 48 Vdc Range 20...

Page 19: ...EEE C37 90 1989 Breaking and Cyclic Capacity per IEC 60255 23 1994 Optoisolated Input Ratings 250 Vdc Pickup 200 300 Vdc dropout 150 Vdc 220 Vdc Pickup 176 264 Vdc dropout 132 Vdc 125 Vdc Pickup 105 150 Vdc dropout 75 Vdc 110 Vdc Pickup 88 132 Vdc dropout 66 Vdc 48 Vdc Pickup 38 4 60 Vdc dropout 28 8 Vdc 24 Vdc Pickup 15 30 Vdc Note 24 48 125 220 and 250 Vdc optoisolated inputs draw approximately ...

Page 20: ...2 Relay time is synchronized to within 5 ms of time source input Current differential protection does not require external time source Operating Temperature Range 40 to 85 C 40 to 185 F Note LCD contrast impaired for temperatures below 20 C Relay Weight 3U Rack unit 16 lbs 7 24 kg Type Tests Electromagnetic Compatibility Immunity Electrostatic Discharge IEC 60255 22 2 1996 Severity Level 4 8000 V ...

Page 21: ...c on isolated EIA 422 and G 703 ports Impulse IEC 60255 5 1977 0 5 J 5000 V Laser Safety IEC 60825 1 1993 21 CFR 1040 10 ANSI Z136 1 1993 ANSI Z136 2 1988 eye safe Class 1 laser product Certifications ISO Relay is designed and manufactured using ISO 9001 certified quality program CE Mark Processing Specifications AC Voltage and Current Inputs 16 samples per power system cycle 3 dB low pass filter ...

Page 22: ...ting 3 of angle setting Operate Time for bolted fault See operate time curves in Figure 3 6 and Figure 3 7 Refer to Line Current Differential Elements in Section 3 Line Current Differential Distance Out of Step Overcurrent Voltage Synchronism Check and Frequency Elements for the definition of terms and terminology listed above Difference Current Alarm Setting Setting Range OFF 0 5 to 10 0 A 0 1 A ...

Page 23: ...ult Detectors FD Setting Range 0 5 170 0 AP P secondary 0 01 A steps 5 A nominal 0 1 34 0 AP P secondary 0 01 A steps 1 A nominal Accuracy 0 05 A and 3 of setting 5 A nominal 0 01 A and 3 of setting 1 A nominal Transient Overreach 5 of pickup Max Operating Time See pickup and reset time curves in Figure 3 43 and Figure 3 44 Mho and Quadrilateral Ground Distance Elements Zones 1 4 Impedance Reach M...

Page 24: ...A and 3 of setting 1 A nominal Transient Overreach 5 of pickup Time Delay 0 00 16 000 00 cycles 0 25 cycle steps Timer Accuracy 0 25 cycle and 0 1 of setting Max Operating Time See pickup and reset time curves in Figure 3 43 and Figure 3 44 Time Overcurrent Elements Pickup Range OFF 0 50 16 00 A 0 01 A steps 5 A nominal OFF 0 10 3 20 A 0 01 A steps 1 A nominal Steady State Pickup Accuracy 0 05 A a...

Page 25: ...curacy 0 003 Hz Phase Angle Range 0 80 1 steps Phase Angle Accuracy 4 Definite Time Over or Underfrequency 81 Elements Pickup Range 41 00 65 00 Hz 0 01 Hz steps Pickup Time 32 ms at 60 Hz Max Time Delays 2 00 16 000 00 cycles 0 25 cycle steps Maximum Definite Time Delay Accuracy 0 25 cycles 1 of setting at 60 Hz Steady State plus Transient Overshoot 0 01 Hz Supervisory 27 20 0 150 0 V 5 0 1 V ...

Page 26: ......

Page 27: ...22 TABLES Table 2 1 EIA 232 Communications Cables to Connect the SEL 311L Relay to Other Devices 2 9 Table 2 2 SEL 311L Relay Line Current Differential Electrical Interface Cable Application 2 12 Table 2 3 Output Contact Jumpers and Corresponding Output Contacts 2 19 Table 2 4 Move Jumper JMP23 to Select Extra Alarm 2 20 Table 2 5 Password and Breaker Jumper Operation 2 21 Table 2 6 EIA 232 Serial...

Page 28: ...e 2 11 SEL 311L Relay Provides Line Current Differential Backup Distance and Overcurrent Protection Reclosing and Synch Check for a Transmission Line Setting APP 87L21 or 87L21P 2 14 Figure 2 12 SEL 311L Relay Provides Line Current Differential Backup Distance and Overcurrent Protection and Reclosing for a Transmission Line Current Polarization Source Connected to Channel IP Setting APP 311L 2 15 ...

Page 29: ...Date Code 20010625 Installation 2 1 SEL 311L Instruction Manual SECTION 2 INSTALLATION RELAY MOUNTING Figure 2 1 SEL 311L Relay Dimensions and Panel Mount Cutout ...

Page 30: ...elay can be ordered with the following mounting options Vertical Panel Mount Horizontal Panel Mount Horizontal Rack Mount Figure 2 1 provides the relay dimensions and the panel mount cutout Refer to Figure 2 2 through Figure 2 5 for example front and rear panels drawings ...

Page 31: ...Date Code 20010625 Installation 2 3 SEL 311L Instruction Manual FRONT AND REAR PANEL DIAGRAMS Figure 2 2 SEL 311L Relay Horizontal Rack Mount Front Panel and Typical Rear Panel Drawings ...

Page 32: ...2 4 Installation Date Code 20010625 SEL 311L Instruction Manual Figure 2 3 SEL 311L Relay Horizontal Panel Mount Front Panel and Typical Rear Panel Drawings ...

Page 33: ...Date Code 20010625 Installation 2 5 SEL 311L Instruction Manual Figure 2 4 SEL 311L Relay Vertical Panel Mount Front Panel and Typical Rear Panel Drawings ...

Page 34: ...allation Date Code 20010625 SEL 311L Instruction Manual Figure 2 5 SEL 311L Relay Rear Panel Drawings DB 25 Connectors at Channel X and Channel Y Left and Fiber Optic Interfaces at Channel X and Channel Y Right ...

Page 35: ...LARM Refer to General Specifications in Section 1 Introduction and Specifications for output contact ratings Refer to Figure 2 2 through Figure 2 5 for output contact locations Use both types of contacts to switch either ac or dc loads Optoisolated Inputs The optoisolated inputs in the SEL 311L Relay IN101 IN106 are not polarity dependent and are located on the main board Refer to General Specific...

Page 36: ...on simultaneously The pin definitions for all the ports are given on the relay rear panel and are detailed in Table 10 2 through Table 10 4 in Section 10 Line Current Differential Communications and Serial Port Communications and Commands Refer to Table 2 1 for a list of cables available from SEL for various EIA 232 communications applications Refer to Section 10 Line Current Differential Communic...

Page 37: ...e code can be input into Serial Port 2 on any of the SEL 311L Relay models see Table 10 2 by connecting Serial Port 2 of the SEL 311L Relay to an SEL 2020 with Cable C273A or by using an SEL 2810 Fiber Optic Transceiver A demodulated IRIG B time code can also be input into the connector for Serial Port 1 see Table 10 3 If demodulated IRIG B time code is input into this connector it should not be i...

Page 38: ... Network Multiplexer Channel Card or Adapter Module SEL 311L CHX CHY 25 Pin Male 2 TXDA 14 TXDB 3 RXDA 16 RXDB 17 RXCA 9 RXCB 15 TXCA 12 TXCB 7 COMMON SHLD SEL 311L Remote EIA 422 EIA 422 DWG M311L071a Figure 2 6 Typical EIA 422 Interconnection SEL 311L CHX CHY 25 Pin Male TXDA 2 TXDB 14 RXDA 3 RXDB 16 SHLD Ground cable shield at the multiplexer SEL 311L Local Multiplexer Channel Card or Adapter M...

Page 39: ...el Card or Adapter Module SEL 311L CHX CHY ST Connectors TX RX SEL 311L Remote DWG M311L073 PC37 94 PC37 94 Figure 2 8 IEEE Proposed Standard PC37 94 Fiber to Multiplexer Interface SEL 311L CHX CHY ST Connectors TX RX SEL 311L Local 50 or 62 5 micron Multimode or 9 micron Single mode Fiber SEL 311L CHX CHY ST Connectors TX RX SEL 311L Remote DWG M311L077 Figure 2 9 1300 nm Direct Fiber Connection ...

Page 40: ... Differential Electrical Interface Cable Application MFG Product Channel Card Interface Adapter SEL Cable Interface Type RFL IMUX DS562I MA406IA C453 EIA 422 RS 449 RFL IMUX DS562I MA408IA C452 G 703 Pulsar FOCUS 64K N A C451 EIA 422 RS 530 Nortel JMUX Nx64 Unit 86464 01 86447 90 C450 EIA 422 Terminals ...

Page 41: ...ion Manual SEL 311L RELAY AC DC CONNECTION DIAGRAMS FOR VARIOUS APPLICATIONS 1 Voltage Channels VA VB VC and VS and current Channel IP are not used in this application Figure 2 10 SEL 311L Relay Provides Line Current Differential Protection Setting APP 87L ...

Page 42: ...ments and voltage metering 2 Current Channel IP does not need to be connected Channel IP provides current for current polarized directional elements Figure 2 11 SEL 311L Relay Provides Line Current Differential Backup Distance and Overcurrent Protection Reclosing and Synch Check for a Transmission Line Setting APP 87L21 or 87L21P ...

Page 43: ...elements and voltage metering 2 In this example current Channel IP provides current polarization for a directional element used to control ground elements Figure 2 12 SEL 311L Relay Provides Line Current Differential Backup Distance and Overcurrent Protection and Reclosing for a Transmission Line Current Polarization Source Connected to Channel IP Setting APP 311L ...

Page 44: ...at can result in injury or death 5 Each circuit board corresponds to a row of rear panel terminal blocks or connectors and is affixed to a drawout tray 6 Disconnect circuit board cables as necessary Removal of the differential board requires removal of the main board first Ribbon cables can be removed by pushing the extraction ears away from the connector The 6 conductor power cable can be removed...

Page 45: ...Date Code 20010625 Installation 2 17 SEL 311L Instruction Manual Figure 2 13 Jumper Connector and Major Component Locations on the SEL 311L Relay Main Board ...

Page 46: ...2 18 Installation Date Code 20010625 SEL 311L Instruction Manual Figure 2 14 Connector and Major Component Locations on the SEL 311L Relay Differential I O Board ...

Page 47: ...r different output contact types The fast high current interrupting contacts OUT201 OUT206 are all a type contacts and cannot be configured as b type contacts Table 2 3 Output Contact Jumpers and Corresponding Output Contacts SEL 311L Relay Model Number Output Contact Jumpers Corresponding Output Contacts Reference Figure All Models JMP21 JMP29 but not JMP23 ALARM OUT101 Figure 2 13 Extra Alarm Ou...

Page 48: ...e jumper JMP23 in position 1 2 loss of the 87L board will not result in an alarm via OUT107 87HWAL If an output contact is operating as an extra alarm driven by the same signal that operates the dedicated ALARM output contact it will be in the opposite state of the dedicated ALARM output contact in a standard relay shipment In a standard relay shipment the dedicated ALARM output contact comes as a...

Page 49: ...ection 10 Line Current Differential Communications and Serial Port Communications and Commands Note that JMP6 in Figure 2 13 has multiple jumpers A through D Jumpers A and B are used see Table 2 5 Since jumpers C and D are not used the positions ON or OFF of jumpers C and D are of no consequence EIA 232 Multifunction Serial Port Voltage Jumpers The jumpers listed in Table 2 6 connect or disconnect...

Page 50: ...valent recommended by manufacturer Dispose of used batteries according to the manufacturer s instructions If external power is lost or disconnected the battery powers the clock When the relay is powered from an external source the battery only experiences a low self discharge rate Thus battery life can extend well beyond the nominal 10 years because the battery rarely has to discharge after the re...

Page 51: ...tep OOS Characteristics 3 48 Use SEL 321 Relay Application Guides for the SEL 311L Relay 3 48 Overcurrent Protection 3 52 Instantaneous Definite Time Overcurrent Elements 3 52 Phase Instantaneous Definite Time Overcurrent Elements 3 52 Residual Ground Instantaneous Definite Time Overcurrent Elements 3 55 Negative Sequence Instantaneous Definite Time Overcurrent Elements 3 58 Time Overcurrent Eleme...

Page 52: ... Based on Maximum Alpha Plane Angle for an External Fault 3 4 Figure 3 5 CT Saturation Causes Angle Lead and Reduction in Magnitude 3 6 Figure 3 6 Phase 87L Element Trip Speeds for Symmetrical Fault Currents With 87LANG 195 and 87LR 6 Using a Direct Fiber Connection 3 8 Figure 3 7 87LG and 87L2 Element Trip Speeds for Symmetrical Fault Currents With 87LANG 195 and 87LR 6 Using a Direct Fiber Conne...

Page 53: ...round Distance Logic 3 45 Figure 3 38 Zone 1 Extension Logic 3 46 Figure 3 39 Zone Timing Elements 3 47 Figure 3 40 Out of Step Zone Detection Logic 3 50 Figure 3 41 Out of Step Logic 3 51 Figure 3 42 Levels 1 through 3 Phase Instantaneous Definite Time Overcurrent Elements 3 53 Figure 3 43 SEL 311L Relay Nondirectional Instantaneous Overcurrent Element Pickup Time Curve 3 55 Figure 3 44 SEL 311L ...

Page 54: ......

Page 55: ...he SEL 311L Relay and introduces a setting philosophy that gives secure fast sensitive and dependable operation For most two terminal and three terminal applications the 87L settings need not be changed from the factory defaults SEL 311L 87LA 87LB 87LC 87LG 87L2 SEL 311L Ia Ib Ic M311L074 87LC 87LB 87LA 87LG 87L2 Figure 3 1 SEL 311L Relay Line Current Differential Elements The SEL 311L Relay excha...

Page 56: ...he protected line to have zero angle and current flowing out of the protected line to have angle 180 degrees Five Amps of load current flowing from the local to the remote relay produces an A phase current of 5 0 at the local relay and 5 180 at the remote relay The ratio of remote to local current is 180 1 0 5 180 5 I I AL AR v v 180 1 120 5 60 5 I I BL BR v v 180 1 120 5 60 5 I I CL CR v v Equati...

Page 57: ...an internal fault Differential pickup settings 87LGP and 87L2P provide similar supervision for the ground current differential element 87LG and the negative sequence current differential element 87L2 respectively Traditional line current differential relays phase comparison relays and charge comparison relays can also be represented as a restraint region on the Alpha plane See technical paper The ...

Page 58: ...11L078 Re IR IL Im 1 0 IR IL 87LANG 195 A 20 shift caused by source angle and source impedance angle B 21 6 shift caused by 2 ms channel assymetry C 40 shift caused by CT saturation A A B B C C Figure 3 4 Alpha Plane Angel Setting 87LANG Is Based on Maximum Alpha Plane Angle for an External Fault If the internal fault is not at midline or if the sources do not have equal strength the Alpha plane r...

Page 59: ...e ratio to be in error by about 22 degrees on a 60 Hz system In one relay the error is positive counter clockwise on the Alpha plane in the other relay the error is negative clockwise on the Alpha plane Depending on the angular shift at a particular relay this error could add to or subtract from the angles caused by the system non homogeneity and load angle discussed above Assume the angles add as...

Page 60: ...1L Instruction Manual 0 1 2 3 4 5 6 7 8 9 10 11 100 0 100 200 I Amps sec cycles Unsaturated Saturated 0 1 2 3 4 5 6 7 8 9 10 11 0 20 40 60 80 100 120 IP Amps sec cycles 0 1 2 3 4 5 6 7 8 9 10 11 60 50 40 30 20 10 0 10 Degrees cycles M311L081 IP Unsaturated IP Saturated Figure 3 5 CT Saturation Causes Angle Lead and Reduction in Magnitude ...

Page 61: ...differential elements There are not separate restraint region settings for each type of element Three phase fault protection places the highest constraints on setting 87LANG because of source angle considerations Set 87LANG as describe above considering maximum load angle system non homogeneity asymmetrical channel delay and CT saturation For this example set 87LANG to 360 82 2 196 degrees The fac...

Page 62: ...r 87L Settings gives a more thorough discussion on the effects of source impedance angle If the internal fault is not at midline or if the sources are of unequal strength the Alpha plane ratio moves away from 1 0 to the right or left At the limit either the remote or the local current could approach zero for a weak infeed situation If the remote current approaches zero the ratio moves toward the o...

Page 63: ...der setting 87L2P at 10 of nominal current or 0 5 A for a 5 A relay This is the factory default setting for 87L2P The settings defined above are factory default They are also the settings used to produce the operate speed curves shown in Figure 3 7 using high speed output contacts M311L091 87L2 87LG Trip Speed 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 1 2 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 3I2 or 3I0 ...

Page 64: ...f ratio and angle error on the Alpha plane during an external fault First consider negative sequence element 87L2 During an external three phase fault the CTs at one terminal could saturate while the CTs at the other terminal do not This can produce false negative sequence current at one terminal and essentially zero negative sequence current at the other terminal Since all of the measured negativ...

Page 65: ...grees of margin for other sources of error Similar considerations for the phase elements produce similar results An external fault with simultaneous CT saturation and a large 2 ms channel delay asymmetry can produce up to 300 error in phase current ratio magnitude and 62 degrees of phase current ratio angle error The default restraint region easily contains these cases even if they occur simultane...

Page 66: ...eck and Frequency Elements SEL 311L Instruction Manual Figure 3 9 SEL 5601 Screen Capture of the Alpha Plane Plot for an External Fault With CT Saturation at One Terminal Notice that the CT saturation shown in Figure 3 5 is severe and the restraint region shown in Figure 3 9 easily contains the plot locus ...

Page 67: ...struction Manual Figure 3 10 SEL 5601 Screen Capture of the Alpha Plane Plot for an Internal Fault With CT Saturation at One Terminal Figure 3 10 shows the Alpha plane plot generated by applying the waveforms shown in Figure 3 5 as an internal fault Notice that the locus does not encroach on the restraint characteristic for this internal fault ...

Page 68: ...ternal Fault With No CT Saturation Figure 3 11 shows the Alpha plane plot for an external fault without CT saturation Notice that the locus is tightly grouped around 1 180 Settings Related to 87L Elements The remainder of this section discusses all settings related to the 87L elements Most settings need not be calculated only selected to match system topology and protection practices Use the SET c...

Page 69: ...pplication of the SEL 311L Setting APP 87L enables all line current differential based protection plus tapped load coordination elements and nondirectional overcurrent backup elements Settings for all other protective elements are hidden from view Setting APP 87L21 adds step distance and directional overcurrent backup elements APP 87L21P adds capability for pilot protection such as DCB POTT DCUB e...

Page 70: ...ng EDD enables local supervision of the 87L elements with a local current disturbance detector When EDD Y the relay supervises 87L elements with the disturbance detector Relay Word bit DD Disturbance detector supervision ensures the relay detects some change in the local currents before allowing a trip due to 87L element assertion Relay Word bit DD does not supervise received direct trip signals S...

Page 71: ...TR_X to match setting CTR in the remote SEL 311L Relay connected to Channel X Set CTR_Y to match setting CTR in the remote SEL 311L Relay connected to Channel Y Settings CTR_X and CTR_Y may be different from each other and different from the local CTR setting This accommodates different CT ratios at all line terminals All 87L line current differential settings are in secondary Amps referenced to t...

Page 72: ... Three Terminal Protection Logic Use the 87L elements and other elements in the SEL 311L Relay for three terminal line protection The SEL 311L Relay applies the Alpha plane concept introduced earlier to three terminal lines by combining vectorly adding currents from two of the terminals to produce the remote current The remaining uncombined current becomes the local current when calculating the Al...

Page 73: ...ombining the ground currents from Terminals R and S as the remote ground current column 2 in Table 3 1 The relay at R produces the third trip restrain decision using the ground current from Terminal S as the local current and combining the ground currents from Terminals L and R as the remote ground current column 3 in Table 3 1 The relay then selects the trip restrain decision produced by the proc...

Page 74: ...ll no longer be the largest of the three terminal currents In that case the relays select one of the other terminal currents as the largest Assume the relays select Terminal L as the largest current magnitude and so use that current as the local current The remote current is then IR IS The current magnitude at S has decreased to less than half of the non saturated value The inflow current from Ter...

Page 75: ...mation necessary to perform three terminal protection In that case the other two relays automatically disable 87L protection and enable direct transfer tripping even if setting EHSDTT N SEL 311L SEL 311L M311L096 SEL 311L Internal fault causes communications channel failure DTT DTT Figure 3 15 Three Terminal Line With Internal Fault and Channel Failure Alternatively install only two communications...

Page 76: ...al currents as the local current The Relay Word bits shown in Table 3 2 are the result of using the local terminal currents as the local currents when processing the 87L elements Table 3 2 Relay Word Bits Representing Local Current Processing Only When E87L 3 87L Element Relay Word Bits Representing Local Processing Only A phase 50RA 50LA 87LOPA 87LAE CTAA R87LA B87LA PQ87LA B phase 50RB 50LB 87LO...

Page 77: ...ntial Element Settings and Specifications Minimum Difference Current Enable Level Settings Phase 87L 87LPP OFF 1 0 10 0 A sec 5 A nominal OFF 0 2 2 0 A sec 1 A nominal 3I2 Neg Seq 87L 87L2P OFF 0 5 5 0 A sec 5 A nominal OFF 0 1 1 0 A sec 1 A nominal Ground 87L 87LGP OFF 0 5 5 0 A sec 5 A nominal OFF 0 1 1 0 A sec 1 A nominal Accuracy 3 0 01 Inom Ph Diff Current Alarm Pickup CTALRM 0 5 10 A sec 5 A...

Page 78: ...05 1 0 Tapped Load Phase Inst Overcurrent Element Settings Pickup T50PP OFF 0 5 100 0 A sec 5 A nominal OFF 0 1 20 0 A sec 1 A nominal Steady State Pickup Accuracy 0 05 A and 4 of setting 5 A nominal 0 01 A and 4 of setting 1 A nominal Transient Overreach 5 of pickup Time Delay T50PD 0 0 16000 cycles Timer Accuracy 0 25 cycle and 0 1 of setting Tapped Load Residual Ground Time Overcurrent Element ...

Page 79: ...t Settings Pickup T51QP OFF 0 50 16 A sec 5 A nominal OFF 0 1 3 2 A sec 1 A nominal Steady State Pickup Accuracy 0 05 A and 4 of setting 5 A nominal 0 01 A and 4 of setting 1 A nominal Curve T51QC U1 U5 C1 C5 Time Dial T51QTD 0 50 15 00 1 EM Reset Delay T51QRS Y N Curve Timing Accuracy 1 50 cycles and 5 of curve time for current between 2 and 30 multiples of pickup 1 If 51QC is a C curve this rang...

Page 80: ...0a To allow for capacitive inrush timer increases to 1 cycle and setting 87LPP doubles when 1 3PO asserts and for 3 cycles after 3PO deasserts 2 For 1 cycle after any remote phase current exceeds local setting 50LP while the associated remote 3PO bit is asserted or within 3 cycles after the remote 3PO bit deasserts H Timers marked with H are hysteresis counters 50LA 50RA CTRMAX is the maximum of s...

Page 81: ...s to 1 5 cycles and setting 87L2P triples when 1 B87L2 asserts 2 3PO or Negative Disturbance Detector NDD assert and for 3 cycles after 3PO and NDD deassert NDD asserts on falling I1 to desensitize sequence elements during breaker opening on external faults 3 For 1 5 cycles after any remote phase current exceeds local setting 50LP while the associated remote 3PO bit is asserted or within 3 cyles a...

Page 82: ...Timer increases to 1 5 cycles and setting 87LGP triples when 1 B87LG asserts 2 3PO or Negative Disturbance Detector NDD assert and for 3 cycles after 3PO and NDD deassert NDD asserts on falling I1 to desensitize sequence elements during breaker opening on external faults 3 For 1 5 cycles after any remote phase current exceeds local setting 50LP while the associated remote 3PO bit is asserted or wi...

Page 83: ... Word Bits _ _ _ T50PD 0 M311L107 Figure 3 20 Phase Instantaneous and Definite Time Overcurrent Elements T50GP Setting 3I0L 3I0R T50G T50GT Relay Word Bits _ T50GD 0 M311L108 T50GTC SELOGIC Figure 3 21 Residual Instantaneous and Definite Time Overcurrent Elements T50QP Setting 3I2L 3I2R T50Q T50QT Relay Word Bits _ T50QD 0 M311L109 T50QTC SELOGIC Figure 3 22 Negative Sequence Instantaneous and Def...

Page 84: ...al Distance Out of Step Overcurrent Date Code 20011112 Voltage Synchronism Check and Frequency Elements SEL 311L Instruction Manual Figure 3 23 Phase Time Overcurrent Elements Figure 3 24 Residual Ground Time Overcurrent Elements ...

Page 85: ...e to phase phase to phase to ground and three phase faults Compensator distance elements are included for distance relaying through wye delta transformer banks and for users who desire a different operating principle for backup relaying Compensator distance phase elements implemented in the SEL 311L Relay detect phase to phase phase to phase to ground and three phase faults Operating Principles of...

Page 86: ...rop compensated voltage and a polarizing reference voltage mem V V I Z Re 0 1 Equation 3 3 Table 3 4 Phase Distance Calculations Positive Sequence Polarized Mho Element Compensator Distance Mho Element Distance Calculation in a Digital Relay mem V I Z 1 Re mem V V Re mAB 1 AB AB 1 AB AB Phase A B mem V I Z 1 Re mem V V Re mBC 1 BC BC 1 BC BC Phase B C mem V I Z 1 Re mem V V Re mCA 1 CA CA 1 CA CA ...

Page 87: ... SEL 311L Instruction Manual I X I R V1mem Z I V Restrain cos θ 0 Z I V I Zsource θ Balance cos 90 0 I X I R V1mem Z I V Z I V I Zsource Operate cos θ 0 I X I R V1mem Z I V Z I V I Zsource mAB Zone Reach mAB Zone Reach mAB Zone Reach M311L113 θ θ Figure 3 26 Positive Sequence Polarized Mho Element With Reach Equal to Line Impedance ...

Page 88: ... Test Angle θ 180 sin θ 0 VB VAB rZ IAB V BC rZ I BC Fault Near Balance Point VA VC VB VAB rZ IAB V BC rZ I BC Forward External Fault VA VC VB VAB rZ IAB V BC rZ I BC Internal Fault VA VC Test Angle θ 180 sin θ 0 Test Angle θ 180 sin θ 0 Note VA VB and VC are internal element voltages not system voltages Test Angle θ 180 sin θ 0 M311L114 Figure 3 27 Compensator Distance Phase to Phase Element Oper...

Page 89: ...lement Operation Positive sequence polarized and compensator distance mho elements each have different operating advantages in different protection environments but work equally well in the majority of transmission line applications Consider using compensator distance elements when A different phase distance operating principle is desired for backup relaying Protecting a transmission line through ...

Page 90: ...suffix to the number of zones in the E21P setting e g 3C is three zones of compensator distance relaying If EADVS N and compensator distance elements are selected E21MG is set to N and hidden If EADVS Y setting E21MG is visible and the user may apply ground distance relaying along with compensator distance phase relaying Mho Phase Distance Elements Zones 1 4 Enable Setting E21P Setting range for M...

Page 91: ...ure 3 38 DWG M311L116 See Note 1 mAB Z1P X1 From Figure 4 2 CVTBL VPOLV From Figure 4 1 ILOP FSB FSA From Figure 4 14 32QF From Figure 4 15 F32P Internal Element MABC1 Zone 1 Compensator Distance Logic Note 2 ABC1 and PP1 are compensator distance element calculations Zone 1 extension if active is included in this calculation IAB 50PP1 Setting C in E21P Setting VPOLV From Figure 4 1 ILOP IBC ICA Se...

Page 92: ...Z2P Zone 2 Distance Setting VPOLV From Figure 4 1 ILOP FSB FSA From Figure 4 15 F32P Internal Element Relay Word Bits DWG M311L117 From Figure 4 14 32QF From Figure 4 15 F32P Internal Element MABC2 Zone 2 Compensator Distance Logic Note 2 ABC2 and PP2 are compensator distance element calculations IAB 50PP2 Setting C in E21P Setting VPOLV From Figure 4 1 ILOP IBC ICA See Note 2 ABC2 0 Calc See Note...

Page 93: ...lement MABCn Zone n Compensator Distance Logic Note 2 ABCn and PPn are compensator distance element calculations IAB 50PPn Advanced Setting C in E21P Setting From Figure 4 1 ILOP IBC ICA See Note 2 ABCn 0 Calc See Note 2 PPn 0 Calc MPPn _ _ _ MBCn MCAn MPPn MABCn C in E21P From Figure 4 15 F32P Internal Element DIRn F Setting From Figure 4 14 32QR DIRn F Setting Relay Word Bits unless noted VPOLV ...

Page 94: ...ents RG1 through RG4 OFF 0 05 to 50 Ω sec 0 01 Ω steps 5 A nominal OFF 0 25 to 250 Ω sec 0 01 Ω steps 1 A nominal Minimum sensitivity is controlled by the pickup of the supervising phase and residual overcurrent elements for each zone Accuracy 5 of setting at line angle for 30 SIR 60 3 of setting at line angle for SIR 30 Transient Overreach 5 of setting plus steady state accuracy Phase and Residua...

Page 95: ...G 0 Z 1 A 0 k 1 M 0 k Settings range for quadrilateral ground polarizing quantity hidden and set to I2 when EADVS N XGPOL I2 negative sequence current or I0 zero sequence current advanced setting Settings range for non homogenous correction angle hidden and set to 3 when EADVS N TANG 45 to 45 degrees advanced setting IA 50L1 Setting From Figure 4 12 32GF _ _ IG 50GZ1 Setting See Note 1 mAG Z1MG X1...

Page 96: ...MG Zone 2 Distance Setting Relay Word Bits Relay Word Bit Relay Word Bits unless noted Figure 3 33 Zone 2 Mho Ground Distance Logic DIRn F Setting From Figure 4 12 32GF IA 50Ln Advanced Setting mAG ZnMG FSA From Figure 5 5 3PO From Figure 4 1 ILOP VPOLV _ Zone 3 and 4 A Phase Mho Ground Distance Logic B and C Phase Logic Is Similar Note 1 mAG A Phase to Ground Distance Calculation ZnMG Zone n Dist...

Page 97: ...und Distance Logic B and C Phase Are Similar Note 1 xAG A Phase to Ground Reactance Calculation XG1 Zone 1 Reactance Setting X1 Zone 1 Extension from Figure 3 38 rAG A Phase to Ground Resistance Calculation RG1 Zone 1 Resistance Setting RG1 rAG RG1 From Figure 4 6 32QGE From Figure 4 12 32GF XGPOL I2 Advanced Setting XGPOL IG Advanced Setting From Figure 4 7 32VE From Figure 4 2 CVTBL XAG1 See Not...

Page 98: ...POLV Zone 2 A Phase Quadrilateral Ground Distance Logic B and C Phase Are Similar Note 1 xAG A Phase to Ground Reactance Calculation XG2 Zone 2 Reactance Setting rAG A Phase to Ground Resistance Calculation RG2 Zone 2 Resistance Setting RG2 rAG RG2 From Figure 4 6 32QGE From Figure 4 12 32GF XGPOL I2 Advanced Setting XGPOL IG Advanced Setting From Figure 4 7 32VE XAG2 See Note 1 Relay Word Bits un...

Page 99: ...Gn From Figure 4 6 32QE From Figure 4 12 32GR XGPOL I2 Advanced Setting XGPOL IG Advanced Setting From Figure 4 7 32VE RGn rAG RGn DIRn F Setting See Note 1 Relay Word Bits unless noted Relay Word Bit Figure 3 37 Zones 3 and 4 Quadrilateral Ground Distance Logic Additional Distance Element Supervision The SEL 311L Relay uses Relay Word bit VPOLV for positive sequence memory supervision of mho and ...

Page 100: ... Zone 1 reach Zone 1 Extension Multiplier Z1EXTM Sets the scalar by which all Zone 1 reaches are multiplied Z1EXTM times the Zone 1 distance setting is never set less than the Zone 1 distance setting or greater than 90 percent of Zone 2 reach Z1P Z1EXTM Z1P 0 9 Z2P and Z1MG Z1EXTM ZMG 0 9 Z2MG and X1G Z1EXTM X1G 0 9 X2G must all be true or the SEL 311L Relay will not allow the Z1EXTM setting EZ1EX...

Page 101: ...on zone number in the appropriate SELOGIC trip equation TR M1P Z1G Z2T 51GT 51QT The timing of the common zone timer is frozen or suspended if the timer is timing and the timer input drops out The duration of the suspension is one cycle This feature prevents the timer resetting when a fault evolves e g φφ to 3φ SLG to φφG If the timer expires the suspension logic is blocked Z1D 0 Z1PD 0 Z1GD 0 SUS...

Page 102: ...e the same as those in the SEL 321 5 Relay Refer to Application Guide 97 13 SEL 321 5 Relay Out of Step Logic for applying the out of step logic in the SEL 311L Relay The timer setting UBOSBD shown in Figure 3 37 is an adaptive setting calculated by the relay This adaptive setting which is the expected duration of the swing within the inner blinders is based on the actual time it takes for the swi...

Page 103: ...1L6 70 to 0 05 Ω sec 0 01 Ω steps 5 A nominal 350 to 0 25 Ω sec 0 01 Ω steps 1 A nominal Inner Blinders Set by the relay internally at 0 1 Z1MAG or 0 25 INOM whichever is greater Accuracy 5 of setting at line angle for 30 SIR 60 3 of setting at line angle for SIR 30 Transient Overreach 5 of setting plus steady state accuracy Positive Sequence Current Supervision Element 50ABC Setting Range for Pos...

Page 104: ...5ABC Impedance inside Zone 5 OSB1 Block Zone 1 during an out of step condition UBOSB Unblock out of step blocking OSB2 Block Zone 2 during an out of step condition OSB Out of step block OSB3 Block Zone 3 during an out of step condition OSTI Incoming out of step trip OSB4 Block Zone 4 during an out of step condition I1 50ABCP Setting _ M311L127 UBOSBD 0 UBOSB X5ABC X6ABC 50ABC Z1 V1 I1 Im Z1 Re Z1 ...

Page 105: ...ual OOSB4 Y Setting OOSB3 Y Setting OOSB2 Y Setting OOSB1 Y Setting EOOST O Setting X5ABC EOOST I Setting EOOST N Setting X6ABC UBOSB OSBD 0 OSTD 0 2 sec 0 0 1 4 CYC OSB OSTI OST OSTO OSB1 To Figure 3 29 OSB2 To Figure 3 30 OSB3 To Figure 3 31 OSB4 To Figure 3 31 M311L128 Relay Word Bits Reset From Figure 3 40 From Figure 3 40 Figure 3 41 Out of Step Logic ...

Page 106: ...tting 87L the factory default torque control 67P1TC is set such that the Level 1 phase instantaneous definite time element is enabled only if the line current differential protection is not available possibly due to channel loss Configure the torque control equations for each of the overcurrent elements to suite your application needs Refer to Section 14 Application Settings for SEL 311L Relays fo...

Page 107: ... individual phase currents IA IB and IC The logic outputs in Figure 3 42 are Relay Word bits and operate as follows Level 1 example shown 50P1 1 logical 1 if at least one phase current exceeds the 50P1P setting 0 logical 0 if no phase current exceeds the 50P1P setting Ideally set 50P1P 50P2P 50P3P so that overcurrent elements display in an organized fashion in event reports see Figure 3 42 and Tab...

Page 108: ... other setting Input IN105 asserted 67P1TC IN105 logical 1 67P1 67P1T follows 50P1 67P1TC M2P 67P1 67P1T uses the Zone 2 mho phase distance element to provide forward directional control if potentials are present at Terminals VA VB and VC The element will be nondirectional if 67P1TC 1 Other SELOGIC control equation torque control settings may be set to provide directional control See Overcurrent D...

Page 109: ...idual ground instantaneous definite time overcurrent elements are available The different levels are enabled with the E50G enable setting as shown in Figure 3 45 All residual ground instantaneous definite time overcurrent elements are available for use in any user defined tripping or control scheme To understand the operation of Figure 3 45 follow the explanation given for Figure 3 42 in the prece...

Page 110: ... Levels 1 and 2 fixed in the forward direction by setting the ORDER I This setting will allow the directional algorithm to use Ip if available as a polarizing quantity Use Levels 3 and 4 in either the forward or reverse direction by setting ORDER I and setting DIR3 and DIR4 to either F forward or R reverse to use Ip if available as a polarizing quantity To make the residual ground instantaneous de...

Page 111: ...G4T 67G4 _ 50G3 67G3 67G3T 67G1D 0 DIR 3 F Setting 32GR 67G3D 0 67G4D 0 Relay Word Bits 50G2P Setting 67G2TC SELOGIC 50G3P Setting 67G3TC SELOGIC 50G4P Setting 67G4TC SELOGIC M311L055 Relay Word Bits unless noted 32GF ORDER OFF Setting 32GF ORDER OFF Setting ORDER OFF Setting DIR 4 F Setting 32GR 32GF ORDER OFF Setting Figure 3 45 Levels 1 Through 4 Residual Ground Instantaneous Definite Time Over...

Page 112: ...finite time overcurrent elements are available The different levels are enabled with the E50Q enable setting as shown in Figure 3 46 To understand the operation of Figure 3 46 follow the explanation given for Figure 3 42 in the preceding Phase Instantaneous Definite Time Overcurrent Elements subsection substituting negative sequence current 3I2 3I2 IA a2 IB a IC ABC rotation 3I2 IA a2 IC a IB ACB ...

Page 113: ...inputs IA IB IC OFF 0 05 20 00 A secondary 1 A nominal phase current inputs IA IB IC Settings range for definite time settings 67Q1D through 67Q4D 0 00 16000 00 cycles in 0 25 cycle steps Accuracy Pickup 0 05 A secondary and 3 of setting 5 A nominal phase current inputs IA IB IC 0 01 A secondary and 3 of setting 1 A nominal phase current inputs IA IB IC Timer 0 25 cycles and 0 1 of setting Transie...

Page 114: ...4T 67Q4 _ 50Q3 67Q3 67Q3T 67Q1D 0 DIR 3 F Setting 32QR 67Q3D 0 67Q4D 0 50Q2P Setting 67Q2TC SELOGIC 50Q3P Setting 67Q3TC SELOGIC 50Q4P Setting 67Q4TC SELOGIC M311L056 Relay Word Bits unless noted 32QF ORDER OFF Setting 32QF ORDER OFF Setting ORDER OFF Setting DIR 4 F Setting 32QR 32QF ORDER OFF Setting Relay Word Bits Figure 3 46 Levels 1 Through 4 Negative Sequence Instantaneous Definite Time Ove...

Page 115: ... 3 7 Phase Time Overcurrent Element Maximum Phase Settings Setting Definition Range 51PP pickup 0 50 16 00 A secondary 5 A nominal phase current inputs IA IB IC 0 10 3 20 A secondary 1 A nominal phase current inputs IA IB IC 51PC curve type U1 U5 US curves see Figure 9 1 Figure 9 10 C1 C5 IEC curves 51PTD time dial 0 50 15 00 US curves see Figure 9 1 Figure 9 10 0 05 1 00 IEC curves 51PRS electrom...

Page 116: ...t Element 51PT Accuracy Pickup 0 05 A secondary and 3 of setting 5 A nominal phase current inputs IA IB IC 0 01 A secondary and 3 of setting 1 A nominal phase current inputs IA IB IC Curve Timing 1 50 cycles and 4 of curve time for currents between and including 2 and 30 multiples of pickup 51PT Element Logic Outputs The logic outputs in Figure 3 47 are the Relay Word bits shown in Table 3 8 ...

Page 117: ...ure 3 47 compares the pickup setting 51PP to the maximum phase current IABC if the Torque Control Switch is closed IABC is also routed to the curve timing reset timing functions The Relay Word Bit logic outputs operate as follows with the Torque Control Switch closed 51P 1 logical 1 if IABC pickup setting 51PP and the phase time overcurrent element is timing or is timed out on its curve 0 logical ...

Page 118: ...hase time overcurrent element is fully reset Torque Control Refer to Figure 3 47 SELOGIC control equation torque control settings e g 51PTC cannot be set directly to logical 0 The following are settings examples of SELOGIC control equation torque control setting 51PTC for phase time overcurrent element 51PT 51PTC 1 Setting 51PTC set directly to logical 1 The Torque Control Switch closes and phase ...

Page 119: ...se time overcurrent element reset timing emulates electromechanical reset timing If maximum phase current IABC goes above pickup setting 51PP element is timing or already timed out and then current IABC goes below 51PP the element starts to time to reset emulating electromechanical reset timing Relay Word bit 51PR resetting indication logical 1 when the element is fully reset See Time Overcurrent ...

Page 120: ... IB IC 51GC curve type U1 U5 US curves see Figure 9 1 Figure 9 10 C1 C5 IEC curves 51GTD time dial 0 50 15 00 US curves see Figure 9 1 Figure 9 10 0 05 1 00 IEC curves 51GRS electromechanical reset timing Y Enable electromechanical reset timing N 1 cycle reset delay 51GTC SELOGIC control equation torque control setting Relay Word bits referenced in Tables 9 3 and 9 4 or set directly to logical 1 s...

Page 121: ... A nominal phase current inputs IA IB IC 0 01 A secondary and 3 of setting 1 A nominal phase current inputs IA IB IC Curve Timing 1 50 cycles and 4 of curve time for currents between and including 2 and 30 multiples of pickup Negative Sequence Time Overcurrent Element To understand the operation of Figure 3 49 follow the explanation given for Figure 3 47 in the preceding Phase Time Overcurrent Ele...

Page 122: ...C control equation torque control setting Relay Word bits referenced in Tables 9 3 and 9 4 or set directly to logical 1 see note below Note SELOGIC control equation torque control settings e g 51QTC cannot be set directly to logical 0 Where potentials are absent at Terminals VA VB VC set 51QTC 1 to use this element in a nondirectional mode See Section 9 Setting the Relay for additional time overcu...

Page 123: ...L Relay rear panel voltage input VS see note below Note Voltage VS is used in the synchronism check elements described in the following subsection Synchronism Check Elements Voltage VS is also used in the three voltage elements described at the end of Table 3 12 and in Figure 3 52 These voltage elements are independent of the synchronism check elements even though voltage VS is used in both Voltag...

Page 124: ...60 00 V secondary 27CA VCA 59AB VAB 59PP 59BC VBC OFF 0 00 260 00 V secondary 59CA VCA 59N1 3V0 VA VB VC 59N1P OFF 0 00 150 00 V secondary 59N2 3V0 VA VB VC 59N2P OFF 0 00 150 00 V secondary 59Q V2 J VA a 2 VB aVC 59QP OFF 0 00 100 00 V secondary 59V1 V1 J VA aVB a2 VC 59V1P OFF 0 00 150 00 V secondary Figure 3 51 27S VS 27SP OFF 0 00 150 00 V secondary 59S VS 59SP OFF 0 00 150 00 V secondary Figu...

Page 125: ...e 20011112 Line Current Differential Distance Out of Step Overcurrent 3 71 Voltage Synchronism Check and Frequency Elements SEL 311L Instruction Manual Figure 3 50 Single Phase and Three Phase Voltage Elements ...

Page 126: ...ne Current Differential Distance Out of Step Overcurrent Date Code 20011112 Voltage Synchronism Check and Frequency Elements SEL 311L Instruction Manual Figure 3 51 Phase to Phase and Sequence Voltage Elements ...

Page 127: ... setting 27P is compared to the magnitudes of the individual phase voltages VA VB and VC The logic outputs in Figure 3 50 are the following Relay Word bits 27A 1 logical 1 if VA pickup setting 27P 0 logical 0 if VA pickup setting 27P 27B 1 logical 1 if VB pickup setting 27P 0 logical 0 if VB pickup setting 27P 27C 1 logical 1 if VC pickup setting 27P 0 logical 0 if VC pickup setting 27P 3P27 1 log...

Page 128: ... side of the circuit breaker is selected by setting SYNCP The two synchronism check elements use the same voltage magnitude window to ensure healthy voltage and slip frequency settings see Figure 3 53 They have separate angle settings see Figure 3 54 Fixed Angle Synchronism Check To implement a simple fixed angle synchronism check scheme set TCLOSD OFF and 25SF 0 500 With these settings the synchr...

Page 129: ...m shock These synchronism check elements are explained in detail in the following text Synchronism Check Elements Settings Table 3 13 Synchronism Check Elements Settings and Settings Ranges Setting Definition Range 25VLO low voltage threshold for healthy voltage window 0 00 150 00 V secondary 25VHI high voltage threshold for healthy voltage window 0 00 150 00 V secondary 25SF maximum slip frequenc...

Page 130: ...nt Differential Distance Out of Step Overcurrent Date Code 20011112 Voltage Synchronism Check and Frequency Elements SEL 311L Instruction Manual Figure 3 53 Synchronism Check Voltage Window and Slip Frequency Elements ...

Page 131: ...Date Code 20011112 Line Current Differential Distance Out of Step Overcurrent 3 77 Voltage Synchronism Check and Frequency Elements SEL 311L Instruction Manual Figure 3 54 Synchronism Check Elements ...

Page 132: ...t the voltages are healthy and lie within settable voltage limits 25VLO and 25VHI If both voltages are within the voltage window the following Relay Word bits assert 59VP indicates that voltage VP is within voltage window setting limits 25VLO and 25VHI 59VS indicates that voltage VS is within voltage window setting limits 25VLO and 25VHI As discussed previously voltage VA determines the frequency ...

Page 133: ...erted logical 0 The Slip Frequency Calculator output is Slip Frequency fP fS in units of Hz slip cycles second fP frequency of voltage VP in units of Hz cycles second determined from VA fS frequency of voltage VS in units of Hz cycles second A complete slip cycle is one single 360 degree revolution of one voltage e g VS by another voltage e g VP Both voltages are thought of as revolving phasor wis...

Page 134: ... are Static Refer to top of Figure 3 54 If the slip frequency is less than or equal to 0 005 Hz or TCLOSD OFF the Angle Difference Calculator does not take into account breaker close time it presumes voltages VP and VS are static not slipping with respect to one another This would usually be the case for an open breaker with voltages VP and VS that are paralleled via some other electric path in th...

Page 135: ...rence decreasing VS approaching VP Angle Difference angle compensation for breaker close time TCLOSD setting 25ANG1 or 25ANG2 setting 25ANG1 or 25ANG2 Angle Difference angle compensation for breaker close time TCLOSD setting 25ANG1 or 25ANG2 setting 25ANG1 or 25ANG2 DWG M35177 VP VS VS VS VP VS Figure 3 55 Angle Difference Between VP and VS Compensated by Breaker Close Time fP fS and VP Shown as R...

Page 136: ...OSD 1 second 60 cycles 10 cycles 1 second 60 cycles 0 167 second Resulting in Angle Difference VP VS fP fS TCLOSD 1 second 60 cycles 360 slip cycle VP VS 0 10 0 167 360 VP VS 6 During the breaker close time TCLOSD the voltage angle difference between voltages VP and VS changes by 6 degrees This 6 degree angle compensation is applied to voltage VS resulting in derived voltage VS as shown in Figure ...

Page 137: ...now moved past VP If the Angle Difference is increasing but the Angle Difference is still less than maximum angle settings 25ANG1 or 25ANG2 then corresponding synchronism check elements 25A1 or 25A2 assert to logical 1 In this scenario of the Angle Difference increasing but still being less than maximum angle settings 25ANG1 or 25ANG2 the operation of corresponding synchronism check elements 25A1 ...

Page 138: ...C control equation setting 79CLS Reclose Supervision is set as follows 79CLS 25A1 and the angle difference is less than angle setting 25ANG1 at that instant setting 79CLS asserts to logical 1 for 1 4 cycle allowing the sealed in open interval time out to propagate on to the close logic in Figure 6 1 in Section 6 Close and Reclose Logic Element 25A2 operates similarly Synchronism Check Applications...

Page 139: ... available The desired number of frequency elements are enabled with the E81 enable setting E81 N none 1 through 6 as shown in Figure 3 57 Frequency is determined from the voltage connected to voltage terminals VA N Frequency Element Settings Setting Voltages 27B81 Va Vb Vc 0 5 CYC To Frequency Element Logic Figure 3 57 M311L131 Relay Word Bit 27B81P Figure 3 56 Undervoltage Block for Frequency El...

Page 140: ...D3P NFREQ 81D3P NFREQ Frequency Element 3 Setting E81 3 _ 81D4D 0 _ Over Frequency Under Frequency 81D4 81D4T 81D4P 81D4P NFREQ 81D4P NFREQ Frequency Element 4 Setting E81 4 _ 81D5D 0 _ Over Frequency Under Frequency 81D5 81D5T 81D5P 81D5P NFREQ 81D5P NFREQ Frequency Element 5 Setting E81 5 _ 81D6D 0 _ Over Frequency Under Frequency 81D6 81D6T 81D6P 81D6P NFREQ 81D6P NFREQ Frequency Element 6 Sett...

Page 141: ... 65 00 Hz 81D4D frequency element 4 time delay 2 00 16000 00 cycles in 0 25 cycle steps 81D5P frequency element 5 pickup 40 10 65 00 Hz 81D5D frequency element 5 time delay 2 00 16000 00 cycles in 0 25 cycle steps 81D6P frequency element 6 pickup 40 10 65 00 Hz 81D6D frequency element 6 time delay 2 00 16000 00 cycles in 0 25 cycle steps Accuracy Pickup 0 01 Hz Timer 0 25 cycles and 0 1 of setting...

Page 142: ...s than or equal to 61 25 Hz 81D1P 61 25 Hz frequency element 1 outputs 81D1 logical 0 instantaneous element 81D1T logical 0 time delayed element If system frequency is greater than 61 25 Hz 81D1P 61 25 Hz frequency element 1 outputs 81D1 logical 1 instantaneous element 81D1T logical 1 time delayed element Relay Word bit 81D1T asserts to logical 1 only after time delay 81D1D Underfrequency Element ...

Page 143: ...kup setting 27B81P is applicable to other control schemes Relay Word bit 27B81 can be used in other logic at the same time it is used in the frequency element logic If frequency elements are not being used Relay Word bit 27B81 can still be used in other logic with voltage setting 27B81P set as desired Enable the frequency elements setting E81 1 and make setting 27B81P Apply Relay Word bit 27B81 in...

Page 144: ......

Page 145: ...lements 4 10 Directional Element Routing 4 11 Directional Control for Phase Distance and Negative Sequence Elements 4 18 Internal Enables 4 18 Directional Elements 4 19 Directional Element Routing 4 19 Directional Control Settings 4 21 Settings Made Automatically 4 21 Settings 4 22 E32IV SELOGIC Control Equation Enable 4 27 Overcurrent Directional Control Provided by Torque Control Settings 4 28 T...

Page 146: ...istance and Residual Ground Overcurrent Elements 4 15 Figure 4 10 Zero Sequence Voltage Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements 4 16 Figure 4 11 Channel IP Current Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements 4 17 Figure 4 12 Ground Distance and Residual Ground Directional Logic 4 17 Figure 4 13 Genera...

Page 147: ...Current Differential Distance Out of Step Overcurrent Voltage and Synchronism Check Elements This section describes the LOP CCVT and load encroachment logic and also describes the operation of current and voltage polarized directional elements When voltages are not applied to the relay or when an LOP condition exists current polarized directional elements are still available The voltage polarized ...

Page 148: ... the case for systems using either line side or bus side potential transformers LOP asserts on one or two missing potentials when 3PO deasserts if phase currents are balanced You may provide a SCADA alarm for bus side potential transformers with the following SELOGIC expression SV1 3PO OUT105 3P59 SV1T LOP See Figure 3 50 Relay Word bit 3P59 asserts when A phase B phase and C phase voltage magnitu...

Page 149: ...ntial logic still operates Relay Word bit LOP asserts to logical 1 for a loss of potential condition but does not disable any voltage polarized directional elements or any distance elements as occurs with ELOP Y or Y1 nor does it enable overcurrent elements set direction forward as occurs with ELOP Y If setting APP 87L SEL 311L is used as a line current differential relay only setting ELOP is hidd...

Page 150: ...3 32 and 3 35 Figure 4 2 CCVT Transient Blocking Logic LOAD ENCROACHMENT LOGIC The load encroachment logic see Figure 4 3 and settings are enabled disabled with setting ELOAD Y or N If setting APP 87L then setting ELOAD is hidden and is internally set to ELOAD N The load encroachment feature allows distance and phase overcurrent elements to be set independent of load levels Relay Word bit ZLOAD is...

Page 151: ...e load encroachment logic only operates if the positive sequence current I1 is greater than the Positive Sequence Threshold shown in Figure 4 3 For a balanced load condition I1 phase current magnitude Forward load load flowing out lies within the hatched region labeled ZLOUT Relay Word bit ZLOUT asserts to logical 1 when the load lies within this hatched region Reverse load load flowing in lies wi...

Page 152: ...ystem conditions Nominal Line Line Voltage 230 kV Maximum Forward Load 800 MVA Maximum Reverse Load 500 MVA Power Factor Forward Load 0 90 lag to 0 95 lead Power Factor Reverse Load 0 80 lag to 0 95 lead CT ratio 2000 5 400 PT ratio 134000 67 2000 The PTs are connected line to neutral Convert Maximum Loads to Equivalent Secondary Impedances Start with maximum forward load 800 MVA 1 3 267 MVA per p...

Page 153: ... load 230 2 400 500 2000 21 1 8 secondary Again to provide a margin for setting ZLR ZLR 21 1 8 secondary 0 9 19 00 8 secondary Convert Power Factors to Equivalent Load Angles The power factor forward load can vary from 0 90 lag to 0 95 lead Setting PLAF cos 1 0 90 26o Setting NLAF cos 1 0 95 18o The power factor reverse load can vary from 0 80 lag to 0 95 lead Setting PLAR 180o cos 1 0 80 180o 37o...

Page 154: ...ercurrent Voltage and Synchronism Check Elements To prevent phase time overcurrent element 51PT from operating for high load conditions make the following SELOGIC control equation torque control setting 51PTC ZLOAD For a load condition ZLOAD logical 1 phase time overcurrent element 51PT cannot operate with this torque control setting regardless of the phase current level 51PTC logical 1 NOT logica...

Page 155: ...tional elements are available to control the ground distance and residual ground overcurrent elements These three directional elements are v Negative sequence voltage polarized directional element v Zero sequence voltage polarized directional element v Channel IP current polarized directional element If voltages are not present at terminals VA VB and VC only the channel IP current polarized direct...

Page 156: ...e 4 6 and Figure 4 7 The directional element enables Relay Word bits 32QGE 32VE and 32IE have the following correspondence to the directional elements 32QGE Negative sequence voltage polarized directional element 32VE Zero sequence voltage polarized directional element 32IE Channel IP current polarized directional element Note that Figure 4 6 has extra directional element enable 32QE which is used...

Page 157: ...he directional element outputs are routed to the forward Relay Word bit 32GF and reverse Relay Word bit 32GR logic points Loss of Potential Note in Figure 4 12 that if all the following are true v enable setting ELOP Y v a loss of potential condition occurs Relay Word bit LOP asserts v and internal enable 32IE for channel IP current polarized directional element is not asserted then the forward lo...

Page 158: ...VT Transient Detection Date Code 20010625 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 6 Internal Enables 32QE and 32QGE Logic for Negative Sequence Voltage Polarized Directional Elements ...

Page 159: ...VT Transient Detection 4 13 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 7 Internal Enables 32VE and 32IE Logic for Zero Sequence Voltage Polarized and Channel IP Current Polarized Directional Elements ...

Page 160: ...4 14 Loss of Potential CCVT Transient Detection Date Code 20010625 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 8 Best Choice Ground Directional Logic ...

Page 161: ...al CCVT Transient Detection 4 15 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 9 Negative Sequence Voltage Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements ...

Page 162: ...ient Detection Date Code 20010625 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 10 Zero Sequence Voltage Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements ...

Page 163: ...17 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 11 Channel IP Current Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements Figure 4 12 Ground Distance and Residual Ground Directional Logic ...

Page 164: ...trol the phase distance elements The negative sequence voltage polarized directional element operates for unbalanced faults while the positive sequence voltage polarized directional element operates for three phase faults Figure 4 13 gives an overview of how the negative sequence voltage polarized and positive sequence voltage polarized directional elements are enabled and routed Figure 4 13 Gener...

Page 165: ...aults Note in Figure 4 15 that the assertion of ZLOAD disables the positive sequence voltage polarized directional element ZLOAD asserts when the relay is operating in a user defined load region see Figure 4 3 Directional Element Routing Refer to Figure 4 13 and Figure 4 14 The directional element outputs are routed to the forward Relay Word bit 32QF and reverse Relay Word bit 32QR logic points Lo...

Page 166: ...ransient Detection Date Code 20010625 Load Encroachment and Directional Element Logic SEL 311L Instruction Manual Figure 4 14 Negative Sequence Voltage Polarized Directional Element for Phase Distance and Negative Sequence Elements ...

Page 167: ...manually AUTO Sets most of the directional element settings automatically Settings Made Automatically If the directional control enable setting E32 is set E32 AUTO then the following directional control settings are calculated and set automatically Z2F Z2R 50QFP 50QRP a2 k2 50GFP 50GRP a0 Z0F and Z0R Once these settings are calculated automatically they can only be modified if the user goes back a...

Page 168: ...rection Settings Phase Distance Ground Distance Residual Ground Negative Sequence Forward M1P 3 29 M1PT 3 34 Z1G 3 32 Z1GT 3 39 67G1 3 45 67G1T 3 45 67Q1 3 46 67Q1T 3 46 Forward M2P 3 30 M2PT 3 34 Z2G 3 33 Z2GT 3 39 67G2 3 45 67G2T 3 45 67Q2 3 46 67Q2T 3 46 DIR3 F or R M3P 3 31 M3PT 3 34 Z3G 3 34 Z3GT 3 39 67G3 3 45 67G3T 3 45 67Q3 3 46 67Q3T 3 46 DIR4 F or R M4P 3 31 M4PT 3 34 Z4G 3 34 Z4GT 3 39 ...

Page 169: ...nal element V zero sequence voltage polarized directional element see Figure 4 10 provides directional control for the ground distance and residual ground overcurrent elements all the time Setting ORDER can be set with any element combination e g ORDER IQV ORDER QVI ORDER IV ORDER VQ ORDER I ORDER Q Note If ground quadrilateral distance elements are used the first entry in the ORDER setting should...

Page 170: ...elow the lowest expected negative sequence current magnitude for unbalanced forward faults The 50QRP setting 3I2 current value is the pickup for the reverse fault detector 50QR of the negative sequence voltage polarized directional elements see Figure 4 6 Ideally the setting is above normal load unbalance and below the lowest expected negative sequence current magnitude for unbalanced reverse faul...

Page 171: ...nitude multiplied by k2 in order for the 32QGE enable and following negative sequence voltage polarized directional element in Figure 4 9 to be enabled N This check assures that the relay uses the most robust analog quantities in making directional decisions for the ground distance and residual ground overcurrent elements If both of the internal enables 32VE enable for the zero sequence voltage po...

Page 172: ... current value is the pickup for the reverse fault detector 50GR of the zero sequence voltage polarized and channel IP current polarized directional elements see Figure 4 7 Ideally the setting is above normal load unbalance and below the lowest expected zero sequence current magnitude for unbalanced reverse faults 50GFP and 50GRP Set Automatically If configuration setting E32 AUTO settings 50GFP a...

Page 173: ... Z0F and Z0R are used to calculate the Forward and Reverse Thresholds respectively for the zero sequence voltage polarized directional elements see Figure 4 10 If configuration setting E32 Y settings Z0F and Z0R zero sequence impedance values are calculated by the user and entered by the user but setting Z0R must be greater in value than setting Z0F by 0 1 8 5A nominal or 0 5 8 1A nominal Z0F and ...

Page 174: ...LOGIC torque control settings Elements that do not have directional control such as 67P1 may be directionally controlled with SELOGIC control equations For example the SELOGIC control equation 67P1TC M2P will enable 67P1 and 67P1T when the Zone 2 phase distance element asserts forward The default settings for all torque control equations is logic 1 or enabled Torque control equations may not be se...

Page 175: ...p Setting TRSOTF 5 13 Communications Assisted Trip Logic General Overview 5 14 Enable Setting ECOMM 5 15 Trip Setting TRCOMM 5 15 Trip Settings TRSOTF and TR 5 16 Trip Setting DTT 5 16 Use Existing SEL 321 Relay Application Guides for the SEL 311L Relay 5 16 Permissive Overreaching Transfer Trip POTT Logic 5 17 Use Existing SEL 321 Relay POTT Application Guide for the SEL 311L Relay 5 17 External ...

Page 176: ...ic 5 18 Figure 5 8 POTT Logic 5 21 Figure 5 9 Permissive Input Logic Routing to Trip Logic 5 22 Figure 5 10 SEL 311L Relay Connections to Communications Equipment for a Two Terminal Line POTT Scheme 5 23 Figure 5 11 SEL 311L Relay Connections to Communications Equipment for a Three Terminal Line POTT Scheme 5 23 Figure 5 12 DCUB Logic 5 27 Figure 5 13 Unblocking Block Logic Routing to Trip Logic 5...

Page 177: ...od to achieve the trip times shown in Figure 3 6 and Figure 3 7 When high speed tripping is enabled Relay Word bit TRIP87 is also routed to the backup protection tripping logic in Figure 5 4 This triggers event reports and the target logic when a high speed 87L trip occurs 87L Tripping Via SELOGIC To qualify 87L protection using a SELOGIC control equation make setting EHST N This disables direct c...

Page 178: ...settings associated with the local disturbance detector Make setting EDD Y at all terminals where a weak infeed or zero infeed condition cannot occur If a weak infeed or zero infeed condition can occur set EDD N The disturbance detector output DD asserts for 10 cycles after the local I1 changes by more than 5 degrees or more than 2 of nominal current or the local I0 changes by more than 5 degrees ...

Page 179: ...EHSDTT Y setting RDTX RDTY 2 CYC 0 87L DD EDD Y setting M311L104 0 8 CYC TDTX TDTY Relay Word Bits Rising Edge Detect 0 TDURD Minimum Trip Duration Timer ULTR TRGTR Unlatch Trip TRIP87 to Figure 5 4 Figure 5 1 Line Current Differential Trip Logic With Direct Transfer Tripping and Local Disturbance Detector Supervision ...

Page 180: ... OUT202 OUT203 OUT204 OUT205 OUT206 To High Speed Outputs OUT201 OUT206 0 Open 1 Closed Relay Word Bits DWG M311L057 SELOGIC Settings Figure 5 2 High Speed Output Logic I1 changed more than 5 or more than 2 Inom in one cycle I0 changed more than 5 or more than 2 Inom in one cycle 10 0 DD 87LPE Relay Word Bit Relay Word Bit M311L103 Figure 5 3 Local Disturbance Detector ...

Page 181: ... where input IN106 is connected to the output of direct transfer trip communications equipment or receive MIRRORED BIT RMB1A is asserted by the transfer trip condition in a remote SEL relay Setting DTT is also used for Direct Underreaching Transfer Trip DUTT schemes TRSOTF Switch Onto Fault Trip Conditions Setting TRSOTF is supervised by the switch onto fault condition SOTFE See Switch Onto Fault ...

Page 182: ...is set with direction forward overreaching Zone 2 distance elements TR is set with direction forward underreaching Zone 1 distance elements and other time delayed elements e g Zone 2 definite time distance elements and TRSOTF is set with instantaneous directional and non directional elements Figure 5 4 Trip Logic In addition when setting EHST r 1 Relay Word bit TRIP asserts when any 87L element de...

Page 183: ... the output of OR 1 gate remains at logical 1 regardless of other trip logic conditions The Minimum Trip Duration Timer can be set no less than 4 cycles The OPEN command is included in the trip logic in the factory settings TR OC Relay Word bit OC asserts for execution of the OPEN Command See OPE Command Open Breaker in Section 10 Line Current Differential Communications and Serial Port Communicat...

Page 184: ... does not assert to logical 1 to automatically deassert the TRIP Relay Word bit Other Applications for the Target Reset Function Note that the combination of the TARGET RESET Pushbutton and the TAR R Target Reset serial port command is also available as Relay Word bit TRGTR See Figure 5 19 and accompanying text for applications for Relay Word bit TRGTR Factory Settings Example Using Setting TR In ...

Page 185: ...re information on the OPEN Command With setting TDURD 9 000 cycles once the TRIP Relay Word bit asserts via SELOGIC control equation setting TR it remains asserted at logical 1 for a minimum of 9 cycles Unlatch Trip In SELOGIC control equation setting ULTR 50L 51G Both elements must be deasserted before the trip logic unlatches and the TRIP Relay Word bit deasserts to logical 0 Additional Settings...

Page 186: ...ing an external breaker failure relay v Keying communication equipment in a Direct Transfer Trip scheme See Output Contacts in Section 7 Inputs Outputs Timers and Other Control Logic for more information on programming output contacts SWITCH ONTO FAULT SOTF TRIP LOGIC Switch Onto Fault SOTF trip logic provides a programmable time window for selected elements to trip right after the circuit breaker...

Page 187: ...top half of Figure 5 5 It is not affected by enable setting ESOTF see the settings sheets in Section 9 Setting the Relay The open circuit breaker condition is determined by load current 50L and either one of v Circuit breaker status 52A logical 0 recommended v Positive sequence voltage V1 27PO not recommended when 87L protection is enabled Select OPO 52 if 3PO is determined by circuit breaker stat...

Page 188: ...iliary contact is not connected to the SEL 311L Relay and OPO 52 SELOGIC control equation setting 52A may be set 52A 0 numeral 0 With SELOGIC control equation setting 52A continually at logical 0 3PO logic is controlled solely by load detection element 50L Phase pickup 50LP is set below load current levels When the circuit breaker is open Relay Word bit 50L drops out logical 0 and the 3PO conditio...

Page 189: ...05 When optoisolated input IN105 is energized CLMON asserts to logical 1 At the instant that optoisolated input IN105 is energized close bus is energized the circuit breaker is still open so the output of the CLOEND timer continues to be asserted to logical 1 Thus the ANDed combination of these conditions latches in the SOTFD timer The SOTFD timer outputs a logical 1 for a time duration of SOTFD c...

Page 190: ...cludes communications assisted tripping schemes that provide unit protection for transmission lines with the help of communications No external coordination devices are required Figure 5 6 Communications Assisted Tripping Scheme Refer to Figure 5 6 and the top half of Figure 5 4 The six available tripping schemes are v Direct Transfer Trip DTT v Direct Underreaching Transfer Trip DUTT v Permissive...

Page 191: ...ons assisted tripping schemes are explained in subsections that follow Use MIRRORED BITS communications to implement any of these tripping schemes efficiently and economically MIRRORED BITS technology is generally used with either POTT or DCUB tripping schemes If the communications channel is reliable and noise free e g dark fiber then POTT gives unsurpassed security and very good dependability If...

Page 192: ...nite time overcurrent elements Trip Setting DTT The DTT and DUTT tripping schemes are realized with SELOGIC control equation trip setting DTT discussed at the beginning of this section Use Existing SEL 321 Relay Application Guides for the SEL 311L Relay The communications assisted tripping schemes settings in the SEL 311L Relay are very similar to those in the SEL 321 Relay Existing SEL 321 Relay ...

Page 193: ... see preceding subsection Communications Assisted Trip Logic General Overview for more setting comparison information on the SEL 321 SEL 311L Relays External Inputs See Optoisolated Inputs in Section 7 Inputs Outputs Timers and Other Control Logic for more information on optoisolated inputs PT1 Received Permissive Trip Signal s In two terminal line POTT applications a permissive trip signal is rec...

Page 194: ...guard timer typically set at 5 cycles EBLKD Echo Block Delay Prevents echoing of received PT for settable delay after dropout of local permissive elements in trip setting TRCOMM typically set at 10 cycles Set to OFF to defeat EBLKD ETDPU Echo Time Delay Pickup Sets minimum time requirement for received PT before echo begins typically set at 2 cycles Set to OFF for no echo EDURD Echo Duration Limit...

Page 195: ...ak terminal protective elements do not operate Note that while the weak infeed terminal contributes little fault current the phase voltage s are depressed SEL 311L Relay Weak Infeed Logic Enable the weak infeed logic by setting EWFC Y The SEL 311L Relay provides additional logic see Figure 5 8 for weak infeed terminals to permit rapid tripping of both line terminals for internal faults near the we...

Page 196: ...OGIC control equation setting OUT105 is set OUT105 KEY Output contact OUT105 drives a communications equipment transmitter input in a two terminal line application see Figure 5 10 In a three terminal line scheme output contact OUT107 is set the same as OUT105 see Figure 5 11 OUT107 KEY EKEY Echo Key Permissive Trip Permissive trip signal keyed by Echo logic used in testing ...

Page 197: ...From Figure 3 45 67G3 From Figure 3 46 67Q3 From Figure 5 5 3PO EBLKD OFF Setting ETDPU OFF Setting From Figure 5 7 PT EWFC Y Setting VAB VBC VCA 27PPW Setting 3V0 59NW Setting 0 EBLKD 0 Z3RBD 0 ETDPU 0 EDURD Reset _ _ _ _ M311L052 WFC ECTT To Trip Logic EKEY KEY To Trip Logic Z3RB Relay Word Bits Rising Edge Detect Relay Word Bits unless noted Figure 5 8 POTT Logic ...

Page 198: ...e 1 ground distance instantaneous element 67G1 Zone 1 directional residual ground instantaneous overcurrent element 67Q1 Zone 1 directional negative sequence instantaneous overcurrent element instead of with element KEY see Figure 5 10 OUT105 M1P Z1G 67G1 67Q1 Note only use enabled elements If echo keying is desired add the echo key permissive trip logic output as follows OUT105 M1P Z1G 67G1 67Q1 ...

Page 199: ...ected in parallel to both transmitter inputs TX on the communication equipment in Figure 5 11 Then output contact OUT107 can be used for another function Figure 5 10 SEL 311L Relay Connections to Communications Equipment for a Two Terminal Line POTT Scheme Figure 5 11 SEL 311L Relay Connections to Communications Equipment for a Three Terminal Line POTT Scheme ...

Page 200: ...1L Relay in a DCUB scheme see preceding subsection Communications Assisted Trip Logic General Overview for more setting comparison information on the SEL 321 SEL 311L Relays External Inputs See Optoisolated Inputs in Section 7 Inputs Outputs Timers and Other Control Logic for more information on optoisolated inputs PT1 PT2xReceived Permissive Trip Signal s In two terminal line DCUB applications se...

Page 201: ...L 311L Relay e g input IN105 and IN103 are driven by communications equipment receiver outputs see Figure 5 15 Make SELOGIC control equation settings LOG1 and LOG2 as follows LOG1 IN105 three terminal line application LOG2 IN103 SELOGIC control equation settings LOG1 and LOG2 are routed into the DCUB logic in Figure 5 12 for unblocking block and permissive trip receive logic decisions Timer Settin...

Page 202: ...M DCUB1 UBB1 disables tripping if the loss of channel condition continues for longer than time UBDURD In three terminal line DCUB applications setting ECOMM DCUB2 UBB1 or UBB2 disable tripping if the loss of channel condition for the respective Channel 1 or 2 continues for longer than time UBDURD The UBB1 and UBB2 are routed in various combinations in Figure 5 13 to control Relay Word bit UBB depe...

Page 203: ...Date Code 20010625 Trip and Target Logic 5 27 SEL 311L Instruction Manual Figure 5 12 DCUB Logic ...

Page 204: ...lay Word bits are then routed in various combinations in Figure 5 9 to control Relay Word bit PTRX depending on enable setting ECOMM DCUB1 or DCUB2 Relay Word bit PTRX is the permissive trip receive input into the trip logic in Figure 5 4 Installation Variations Figure 5 15 shows output contacts OUT105 and OUT107 connected to separate communications equipment for the two remote terminals Both outp...

Page 205: ...uction Manual Figure 5 14 SEL 311L Relay Connections to Communications Equipment for a Two Terminal Line DCUB Scheme Setting ECOMM DCUB1 Figure 5 15 SEL 311L Relay Connections to Communications Equipment for a Three Terminal Line DCUB Scheme Setting ECOMM DCUB2 ...

Page 206: ...lay Use the existing SEL 321 Relay DCB application guide AG93 06 to help set up the SEL 311L Relay in a DCB scheme see preceding subsection Communications Assisted Trip Logic General Overview for more setting comparison information on the SEL 321 SEL 311L Relays External Inputs See Optoisolated Inputs in Section 7 Inputs Outputs Timers and Other Control Logic for more information on optoisolated i...

Page 207: ...utputs The following logic outputs can be tested by assigning them to output contacts See Output Contacts in Section 7 Inputs Outputs Timers and Other Control Logic for more information on output contacts DSTRT Directional Carrier Start Program an output contact for directional carrier start For example SELOGIC control equation setting OUT105 is set OUT105 DSTRT Output contact OUT105 drives a comm...

Page 208: ...output contact to stop carrier For example SELOGIC control equation setting OUT106 is set OUT106 STOP Output contact OUT106 drives a communications equipment transmitter input in a two terminal line application see Figure 5 17 In a three terminal line scheme another output contact e g OUT104 is set the same as OUT106 see Figure 5 18 OUT104 STOP BTX Block Trip Extension The received block trip inpu...

Page 209: ...re 5 16 DCB Logic Installation Variations Figure 5 18 shows output contacts OUT105 OUT106 OUT107 and OUT104 connected to separate communications equipment for the two remote terminals Both output contact pairs are programmed the same OUT105 DSTRT NSTRT and OUT107 DSTRT NSTRT OUT106 STOP and OUT104 STOP Depending on the installation perhaps one output contact e g OUT105 DSTRT NSTRT can be connected...

Page 210: ...input e g IN104 can be connected in parallel to both communications equipment RX receive output contacts in Figure 5 18 Then setting BT would be programmed as BT IN104 and input IN106 can be used for another function In Figure 5 17 and Figure 5 18 the carrier scheme cutout switch contact 85CO should be closed when the communications equipment is taken out of service so that the BT input of the rel...

Page 211: ...tion 13 Testing Troubleshooting and Commissioning 2 TRIP Indication that a trip occurred by any of the protection or control elements 3 TIME Time delayed trip 4 COMM Communications assisted trip not 87L 5 87 Trip caused by line current differential element or 87L DTT bit 6 50 51 Instantaneous time overcurrent trip 7 RS Recloser reset 8 LO Recloser locked out 9 A Phase A involved in the fault 10 B ...

Page 212: ...roviding front panel indication for tripping that does not involve protection elements If the trip is not a protection element generated trip none of the target LEDs illuminate 3 through 6 and 9 through 15 but the TRIP target LED still illuminates Thus tripping via the front panel local control local bits serial port remote bits or OPEN command or voltage elements is indicated only by the illumina...

Page 213: ...n 10 Line Current Differential Communications and Serial Port Communications and Commands are used to trip via the serial port and they should illuminate the COMM target LED set them in SELOGIC control equation setting DTT DTT OC RB1 Additionally if SCADA asserts optoisolated input IN104 to trip and it should illuminate the COMM target LED set it in SELOGIC control equation setting DTT also DTT IN...

Page 214: ...el Pushbutton When the Target Reset Lamp Test front panel pushbutton is pressed v All front panel LEDs illuminate for one 1 second v All latched target LEDs target LEDs numbered 2 through 6 and 9 through 15 in Table 5 1 are extinguished unlatched Other Applications for the Target Reset Function Refer to the bottom of Figure 5 4 The combination of the TARGET RESET Pushbutton and the TAR R Target Re...

Page 215: ... SV8 in Figure 5 19 to seal in Asserted SV8 in turn asserts DP3 causing the message 3 3 63 to display in the rotating default display This message can be removed from the display rotation by pushing the TARGET RESET Pushbutton Relay Word bit TRGTR pulses to logical 1 unlatching SV8 and in turn deasserting DP3 Thus front panel rotating default displays can be easily reset along with the front panel...

Page 216: ......

Page 217: ...4 Reclosing Relay Timer Settings 6 15 Reclosing Relay Shot Counter 6 18 Reclosing Relay SELOGIC Control Equation Settings Overview 6 18 Reclose Initiate and Reclose Initiate Supervision Settings 79RI and 79RIS Respectively 6 19 Drive to Lockout and Drive to Last Shot Settings 79DTL and 79DLS Respectively 6 21 Skip Shot and Stall Open Interval Timing Settings 79SKP and 79STL Respectively 6 23 Block...

Page 218: ...pplication With Reclosing 6 9 Figure 6 5 Reclosing Relay States and General Operation 6 12 Figure 6 6 Reclosing Sequence From Reset to Lockout With Example Settings 6 16 Figure 6 7 Sequence Coordination Between the SEL 311L Relay and a Line Recloser 6 27 Figure 6 8 Operation of SEL 311L Relay Shot Counter for Sequence Coordination With Line Recloser Additional Settings Example 1 6 28 Figure 6 9 Op...

Page 219: ... check right before the close logic asserts the close output contact Reclose Logic This subsection describes all the reclosing relay settings and logic needed for automatic reclosing besides the final close logic and reclose supervision logic described in the previous subsections The reclose enable setting E79 has setting choices N 1 2 3 and 4 The default setting E79 N defeats the reclosing relay ...

Page 220: ...he CLOSE Relay Word bit can be asserted to logical 1 if either of the following occurs A reclosing relay open interval times out qualified by SELOGIC control equation setting 79CLS see Figure 6 2 Or SELOGIC control equation setting CL goes from logical 0 to logical 1 rising edge transition The CLOSE command is the only value in the close logic in the factory default settings CL CC Relay Word bit C...

Page 221: ...actory settings for the close logic SELOGIC control equation settings are 52A IN101 CL CC ULCL TRIP TRIP87 The factory setting for the Close Failure Timer setting is CFD 60 00 cycles See the settings sheets at the end of Section 9 Setting the Relay for setting ranges Set Close If the Reclosing Relay Open Interval Time Out logic input at the top of Figure 6 1 is ignored reclosing is discussed in de...

Page 222: ...er in this section Also the operation of ground distance elements is delayed by the 3POD time to reset 3PO Circuit Breaker Status Refer to the bottom of Figure 6 1 Note that SELOGIC control equation setting 52A circuit breaker status is available as Relay Word bit 52A This makes it convenient to set other SELOGIC control equations For example if the following setting is made 52A IN101 52a auxiliar...

Page 223: ...Figure 6 1 is the indication that a reclosing relay open interval has timed out a qualifying condition SELOGIC control equation setting 79CLS has been met and thus automatic reclosing of the circuit breaker should proceed by asserting the CLOSE Relay Word bit to logical 1 This input into the close logic in Figure 6 1 is an output of the reclose supervision logic in the following Figure 6 2 Figure ...

Page 224: ...6 6 Close and Reclose Logic Date Code 20010625 SEL 311L Instruction Manual Figure 6 3 Reclose Supervision Limit Timer Operation Refer to Bottom of Figure 6 2 ...

Page 225: ...igure 6 1 to automatically reclose the circuit breaker If 79CLS is deasserted to logical 0 at the instant of an open interval time out the following occurs No automatic reclosing takes place Relay Word bit RCSF Reclose Supervision Failure indication asserts to logical 1 for one processing interval The reclosing relay is driven to the Lockout State See Settings Example and Additional Settings Examp...

Page 226: ...l time out condition will propagate through Figure 6 2 and on to the close logic in Figure 6 1 Unlatch Reclose Supervision Logic Bottom of Figure 6 2 Refer to the bottom of Figure 6 2 If the reclosing relay open interval time out condition is sealed in it stays sealed in until one of the following occurs The close logic output CLOSE also see Figure 6 1 asserts Relay Word bit CLOSE logical 1 The re...

Page 227: ...no special reclose supervision Additional Settings Example 1 Refer to the top of Figure 6 2 and Figure 6 4 SEL 311L Relays are installed at both ends of a transmission line in a high speed reclose scheme After both circuit breakers open for a transmission line fault the SEL 311L 1 Relay recloses circuit breaker 52 1 first followed by the SEL 311L 2 Relay reclosing circuit breaker 52 2 after a sync...

Page 228: ...fter a transmission line fault 79STL 0 numeral 0 The SEL 311L 2 Relay starts open interval timing after circuit breaker 52 1 at the remote end has reenergized the line The SEL 311L 2 Relay has to see Bus 2 hot transmission line hot and in synchronism across open circuit breaker 52 2 for open interval timing to begin Thus SEL 311L 2 Relay open interval timing is stalled when the transmission line v...

Page 229: ...eck element 25A1 asserts to logical 1 and reclosing proceeds In the above referenced subsection Synchronism Check Elements note item 3 under Synchronism Check Element Outputs Voltages VP and VS are Slipping Item 3 describes a last attempt for a synchronism check reclose before timer 79CLSD times out or setting 79CLSD 0 00 and only one check is made RECLOSING RELAY Note that input Reclosing Relay O...

Page 230: ... 6 1 Relay Word Bit and Front Panel Correspondence to Reclosing Relay States Reclosing Relay State Corresponding Relay Word Bit Corresponding Front Panel LED Reset 79RS RS Lockout 79LO LO Cycling 79CY The reclosing relay is in one and only one of these states listed in Table 6 1 at any time When in reset or lockout the corresponding Relay Word bit asserts to logical 1 and the LED illuminates Autom...

Page 231: ...ction The Reclose Supervision Limit Timer setting 79CLSD times out see Figure 6 2 and top of Figure 6 3 The OPEN OPE command can be included in the reclosing relay logic via SELOGIC control equation settings For example 79DTL OC drive to lockout Relay Word bit OC asserts for execution of the OPE command See OPE Command Open Breaker in Section 10 Line Current Differential Communications and Serial ...

Page 232: ...ater in this section See also the settings sheets at the end of Section 9 Setting the Relay If the reclosing relay is defeated the following also occur Both reclosing relay state Relay Word bits 79RS and 79LO are forced to logical 0 see Table 6 1 All shot counter Relay Word bits SH0 SH1 SH2 SH3 and SH4 are forced to logical 0 the shot counter is explained later in this section The front panel LEDs...

Page 233: ...be set For example if setting E79 3 the first three open interval time settings in Table 6 2 are made available for setting If an open interval time is set to zero then that open interval time is not operable and neither are the open interval times that follow it In the example settings in Table 6 2 the open interval 3 time setting 79OI3 is the first open interval time setting set equal to zero 79...

Page 234: ...terval times precede open interval 3 time which is set to zero 79OI3 0 00 79OI1 30 00 79OI2 600 00 79OI3 0 00 For this example The number of reclosures last shot is 2 the number of set open interval times that precede the first open interval set to zero Observe Shot Counter Operation Observe the reclosing relay shot counter operation especially during testing with the front panel shot counter scre...

Page 235: ...ng 79RSD if desired SELOGIC control equation setting 79BRS block reset timing can be set to control reset timing see Block Reset Timing Setting 79BRS later in this subsection Monitoring Open Interval and Reset Timing Open interval and reset timing can be monitored with the following Relay Word bits Relay Word Bits Definition OPTMN Indicates that the open interval timer is actively timing RSTMN Ind...

Page 236: ...nd Open Interval Times Shot Corresponding Relay Word Bit Corresponding Open Interval 0 SH0 79OI1 1 SH1 79OI2 2 SH2 79OI3 3 SH3 79OI4 4 SH4 When the shot counter is at a particular shot value e g shot 2 the corresponding Relay Word bit asserts to logical 1 e g SH2 logical 1 Settings Example Use the shot counter to change the protection functions to coordinate with tapped loads The settings ETAP Y T...

Page 237: ...CY Relay Word bit is at logical 1 52A logical 1 or 79CY logical 1 Input IN101 is assigned as the breaker status input in the factory settings 52A IN101 The circuit breaker has to be closed circuit breaker status 52A logical 1 at the instant of the first trip of the auto reclose cycle in order for the SEL 311L Relay to successfully initiate reclosing and start timing on the first open interval The ...

Page 238: ...the TRIP or TRIP87 Relay Word bits will still be asserted to logical 1 when the circuit breaker opens see Figure 5 1 and Figure 5 4 in Section 5 Trip and Target Logic If the TRIP and TRIP87 Relay Word bits are at logical 0 when the circuit breaker opens logical 1 to logical 0 transition the relay goes to the Lockout State This helps prevent reclose initiation for circuit breaker openings caused by...

Page 239: ...0 This is useful for situations where both of the following are true Any of the trip and drive to lockout conditions are pulsed conditions e g the OPE command Relay Word bit OC asserts for only 1 4 cycle refer to the following Settings Example Reclose initiation is by the breaker contact opening e g 79RI 52A refer to Additional Settings Example in the preceding setting 79RI reclose initiation disc...

Page 240: ...me the relay is in the lockout state Relay Word bit 79LO logical 1 the relay is driven to last shot if the shot counter is not already at a shot value greater than or equal to shot 2 79DLS 79LO logical 1 Thus if optoisolated input IN102 reclose enable switch is in the disable reclosing position Relay Word bit IN102 logical 0 or local bit LB3 manual trip switch is operated then the relay is driven ...

Page 241: ...is open see Lockout State earlier in this subsection After successful reclose initiation open interval timing does not start until allowed by the stall open interval timing setting 79STL If 79STL logical 1 open interval timing is stalled If 79STL logical 0 open interval timing can proceed If an open interval time has not yet started timing 79STL logical 1 still the 79SKP setting is still processed...

Page 242: ...ipped and the relay times on the open interval 2 time setting 79OI2 instead Table 6 5 Open Interval Time Settings Example Shot Corresponding Relay Word Bit Corresponding Open Interval Open Interval Time Setting 0 SH0 79OI1 30 cycles 1 SH1 79OI2 600 cycles In Table 6 5 note that the open interval 1 time setting 79OI1 is a short time while the following open interval 2 time setting 79OI2 is signific...

Page 243: ...lay states at any one time see Figure 6 5 When the relay is in the Reset or Lockout States Relay Word bit 79CY is deasserted to logical 0 Thus the 79BRS setting has no effect when the relay is in the Reset or Lockout States When a circuit breaker is closed from lockout there could be cold load inrush current that momentarily picks up a time overcurrent element e g phase time overcurrent element 51...

Page 244: ...s assertion deassertion indicates that a downstream device e g line recloser see Figure 6 7 has operated to clear a fault Incrementing the shot counter keeps the SEL 311L Relay in step with the downstream device as is shown in the following Additional Settings Example 1 and Additional Settings Example 2 Every time a sequence coordination operation occurs the shot counter is incremented and the res...

Page 245: ... the fast curve and then twice on the slow curve The slow curve is allowed to operate after two fast curve operations because the fast curves are then inoperative for tripping The SEL 311L Relay instantaneous definite time overcurrent element T50PT is coordinated with the line recloser fast curve The SEL 311L Relay tapped load phase time overcurrent element T51PT is coordinated with the line reclo...

Page 246: ...L Relay also sees the fault again The tapped load instantaneous overcurrent element T50P asserts and then deasserts without tripping incrementing the relay shot counter from shot 1 to shot 2 The line recloser fast curve is now disabled after operating twice When the line recloser recloses its circuit breaker the line recloser slow curve operates to clear the fault The relay does not operate on its...

Page 247: ...g trip setting TR T50PT SHO T51PT This requires that two open interval settings be made see Table 6 2 and Figure 6 6 This corresponds to the last shot being last shot 2 If the sequence coordination setting is 79SEQ 79RS T50P and there is a permanent fault beyond the line recloser the shot counter of the SEL 311L Relay will increment all the way to shot 4 see Figure 6 8 If there is a coincident fau...

Page 248: ...not continue to increment Sequence coordination setting 79SEQ is effectively disabled by the shot counter incrementing from shot 0 to shot 1 79SEQ 79RS T50P SH0 79RS T50P logical 0 logical 0 The shot counter stays at shot 1 Thus if there is a coincident fault between the SEL 311L Relay and the line recloser the SEL 311L Relay will operate on T51PT and then reclose once instead of going straight to...

Page 249: ...eset Latch Bits for Active Setting Group Change 7 17 Note Make Latch Control Switch Settings with Care 7 18 Multiple Setting Groups 7 20 Active Setting Group Indication 7 20 Selecting the Active Setting Group 7 20 Operation of SELOGIC Control Equation Settings SS1 Through SS6 7 21 Operation of Serial Port GROUP Command and Front Panel GROUP Pushbutton 7 21 Relay Disabled Momentarily During Active ...

Page 250: ... Switching Input Logic 7 25 Table 7 7 SELOGIC Control Equation Settings for Rotating Selector Switch Active Setting Group Switching 7 26 Table 7 8 Operate Time for Contacts OUT201 OUT206 7 35 FIGURES Figure 7 1 Example Operation of Optoisolated Inputs IN101 Through IN106 7 2 Figure 7 2 Circuit Breaker Auxiliary Contact and Reclose Enable Switch Connected to Optoisolated Inputs IN101 and IN102 7 3 ...

Page 251: ...p Switching With Rotating Selector Switch Time Line 7 28 Figure 7 23 SELOGIC Control Equation Variables Timers SV1 SV1T Through SV6 SV6T 7 29 Figure 7 24 SELOGIC Control Equation Variables Timers SV7 SV7T Through SV16 SV16T 7 30 Figure 7 25 Dedicated Breaker Failure Scheme Created With SELOGIC Control Equation Variables Timers 7 31 Figure 7 26 Logic Flow for Example Output Contact Operation 7 34 F...

Page 252: ......

Page 253: ...ce overcurrent voltage and reclosing elements in SELOGIC control equation settings to realize numerous protection and control schemes Relay Word bits and SELOGIC control equation setting examples are used throughout this section See Section 9 Setting the Relay for more information on Relay Word bits and SELOGIC control equation settings See Section 10 Line Current Differential Communications and S...

Page 254: ...t time for the corresponding input Time settings IN101D through IN106D are settable from 0 00 to 1 00 cycles The relay takes the entered time setting and internally runs the timer at the nearest 1 16 cycle For example if setting IN105D 0 80 internally the timer runs at the nearest 1 16 cycle 13 16 cycles 13 16 0 8125 For most applications the input pickup dropout debounce timers should be set in 1...

Page 255: ...Switch Connected to Optoisolated Inputs IN101 and IN102 The functions for inputs IN101 and IN102 Figure 7 2 are described in the following discussions Input IN101 Relay Word bit IN101 Figure 7 2 is used in the settings for the SELOGIC control equation circuit breaker status setting 52A IN101 Connect input IN101 to a 52a circuit breaker auxiliary contact If a 52b circuit breaker auxiliary contact i...

Page 256: ...ut setting 79DTL IN102 NOT IN102 Connect input IN102 to a reclose enable switch When the reclose enable switch is open input IN102 is deenergized and the reclosing relay is driven to lockout 79DTL IN102 NOT IN102 NOT logical 0 logical 1 When the reclose enable switch is closed input IN102 is energized and the reclosing relay is enabled if no other setting condition is driving the reclosing relay t...

Page 257: ...eyboard display see Section 11 Front Panel Interface Figure 7 3 Local Control Switches Drive Local Bits LB1 Through LB16 The output of the local control switch in Figure 7 3 is a Relay Word bit LBn n 1 through 16 called a local bit The local control switch logic in Figure 7 3 repeats for each local bit LB1 through LB16 Use these local bits in SELOGIC control equations For a given local control swi...

Page 258: ...itch name setting Make each label setting through the serial port using the command SET T View these settings using the serial port command SHO T see Section 9 Setting the Relay and Section 10 Line Current Differential Communications and Serial Port Communications and Commands Local Control Switch Types Configure any local control switch as one of the following three switch types ON OFF Switch Loc...

Page 259: ... 1 or OFF LBn logical 0 position or is in the OFF LBn logical 0 position and pulses to the MOMENTARY LBn logical 1 position for one processing interval 1 4 cycle Figure 7 6 Local Control Switch Configured as an ON OFF MOMENTARY Switch Table 7 2 Correspondence Between Local Control Switch Types and Required Label Settings Local Switch Type Label NLBn Label CLBn Label SLBn Label PLBn ON OFF X X X OF...

Page 260: ...ing relay to lockout CLB3 RETURN OFF position return from MOMENTARY position SLB3 ON position not used left blank PLB3 TRIP MOMENTARY position LB4 NLB4 MANUAL CLOSE closes breaker separate from automatic reclosing CLB4 RETURN OFF position return from MOMENTARY position SLB4 ON position not used left blank PLB3 CLOSE MOMENTARY position Following Figure 7 7 and Figure 7 8 show local control switches...

Page 261: ...ing relay enable disable v Ground relay enable disable v Remote control supervision v Sequence coordination enable disable Local Control Switch States Retained Power Loss The states of the local bits Relay Word bits LB1 through LB16 are retained if power to the relay is lost and then restored If a local control switch is in the ON position corresponding local bit is asserted to logical 1 when powe...

Page 262: ...ettings change i e the corresponding label settings are nulled the corresponding local bit is then fixed at logical 0 regardless of the local bit state before the settings change If a local control switch is made newly operable because of a settings change i e the corresponding label settings are set the corresponding local bit starts out at logical 0 REMOTE CONTROL SWITCHES Remote control switche...

Page 263: ...sserted to logical 1 before a setting change or an active setting group change it comes back in the ON position corresponding remote bit is still asserted to logical 1 after the change If a remote control switch is in the OFF position corresponding remote bit is deasserted to logical 0 before a settings change or an active setting group change it comes back in the OFF position corresponding remote...

Page 264: ...ough 16 called a latch bit The latch control switch logic in Figure 7 11 repeats for each latch bit LT1 through LT16 Use these latch bits in SELOGIC control equations These latch control switches each have the following SELOGIC control equation settings SETn set latch bit LTn to logical 1 RSTn reset latch bit LTn to logical 0 If setting SETn asserts to logical 1 latch bit LTn asserts to logical 1 ...

Page 265: ...cted to optoisolated input IN104 Each pulse of the SCADA contact changes the state of the reclosing relay The SCADA contact is not maintained just pulsed to enable disable the reclosing relay Figure 7 12 SCADA Contact Pulses Input IN104 to Enable Disable Reclosing Relay If the reclosing relay is enabled and the SCADA contact is pulsed the reclosing relay is then disabled If the SCADA contact is pu...

Page 266: ...up dropout debounce timer IN104D Feedback Control Note in Figure 7 13 that the latch control switch output latch bit LT1 is effectively used as feedback for SELOGIC control equation settings SET1 and RST1 The feedback of latch bit LT1 guides input IN104 to the correct latch control switch input If latch bit LT1 logical 0 input IN104 is routed to setting SET1 set latch bit LT1 SET1 IN104 LT1 IN104 ...

Page 267: ...serted for a few cycles by the SCADA contact see Pulse 1 in Figure 7 14 SET1 is asserted to logical 1 for one processing interval This causes latch bit LT1 to change state to LT1 logical 1 the next processing interval With latch bit LT1 now at logical 1 for the next processing interval input IN104 is routed to setting RST1 as discussed previously RST1 IN104 rising edge of input IN104 This would th...

Page 268: ...1 RB1 LT1 rising edge of remote bit RB1 AND NOT LT1 RST1 RB1 LT1 rising edge of remote bit RB1 AND LT1 79DTL LT1 NOT LT1 drive to lockout setting Pulse remote bit RB1 to enable reclosing pulse remote bit RB1 to disable reclosing etc much like the operation of optoisolated input IN104 in the previous example Remote bits Relay Word bits RB1 through RB16 are operated through the serial port See Figur...

Page 269: ...ndividual settings are changed for the active setting group or one of the other setting groups or the active setting group is changed the states of the latch bits Relay Word bits LT1 through LT16 are retained much like in the preceding Power Loss explanation If individual settings are changed for a setting group other than the active setting group there is no interruption of the latch bits the rel...

Page 270: ...r relay service life This requires that SELOGIC control equation settings SETn and RSTn for any given latch bit LTn be set with care Settings SETn and RSTn cannot result in continuous cyclical operation of latch bit LTn Use timers to qualify conditions set in settings SETn and RSTn If any optoisolated inputs IN101 through IN106 are used in settings SETn and RSTn the inputs have their own debounce ...

Page 271: ...o 300 cycles Then the SV6T timer keeps the state of latch bit LT1 from being able to be changed at a rate faster than once every 300 cycles 5 seconds Figure 7 16 Latch Control Switch With Time Delay Feedback Controlled by a Single Input to Enable Disable Reclosing Figure 7 17 Latch Control Switch With Time Delay Feedback Operation Time Line ...

Page 272: ... active setting group SG4 Indication that setting Group 4 is the active setting group SG5 Indication that setting Group 5 is the active setting group SG6 Indication that setting Group 6 is the active setting group For example if setting Group 4 is the active setting group Relay Word bit SG4 asserts to logical 1 and the other Relay Word bits SG1 SG2 SG3 SG5 and SG6 are all deasserted to logical 0 S...

Page 273: ...p 3 still remains the active setting group With setting Group 3 as the active setting group if setting SS3 is deasserted to logical 0 and one of the other settings e g setting SS5 asserts to logical 1 the relay switches from setting Group 3 as the active setting group to another setting group e g setting Group 5 as the active setting group after qualifying time setting TGR TGR Group Change Delay S...

Page 274: ...lay In this example optoisolated input IN105 on the relay is connected to a SCADA contact in Figure 7 18 Each pulse of the SCADA contact changes the active setting group from one setting group e g setting Group 1 to another e g setting Group 4 The SCADA contact is not maintained just pulsed to switch from one active setting group to another Figure 7 18 SCADA Contact Pulses Input IN105 to Switch Ac...

Page 275: ...ups 1 and 4 Figure 7 19 SELOGIC Control Equation Variable Timer SV8T Used in Setting Group Switching In this example timer SV8T is used in both setting groups different timers could have been used with the same operational result The timers reset during the setting group change allowing the same timer to be used in both setting groups Timer pickup setting SV8PU is set greater than the pulse width ...

Page 276: ...ise for the setting Group 4 settings at the bottom of the figure Setting Group 4 is now the active setting group and Relay Word bit SG4 asserts to logical 1 After the relay has been in setting Group 4 for a time period equal to SV8PU the timer logic output SV8T asserts to logical 1 thus enabling SELOGIC control equation setting SS1 for a new assertion of input IN105 Note that input IN105 is still ...

Page 277: ...revious SEL relays e g SEL 321 and SEL 251 Relays have multiple settings groups controlled by the assertion of three optoisolated inputs e g IN101 IN102 and IN103 in different combinations as shown in Table 7 6 Table 7 6 Active Setting Group Switching Input Logic Input States Active IN103 IN102 IN101 Setting Group 0 0 0 Remote 0 0 1 Group 1 0 1 0 Group 2 0 1 1 Group 3 1 0 0 Group 4 1 0 1 Group 5 1...

Page 278: ...arranged to assert inputs IN101 IN102 and IN103 dependent on the switch position As shown in Table 7 7 when the selector switch is moved from one position to another a different setting group is activated The logic in Table 7 6 is implemented in the SELOGIC control equation settings in Table 7 7 Table 7 7 SELOGIC Control Equation Settings for Rotating Selector Switch Active Setting Group Switching...

Page 279: ...e desired setting group position Selector Switch Switched to Position 5 Refer to Figure 7 22 If the selector switch is rested on position 5 in Figure 7 21 setting Group 5 becomes the active setting group after qualifying time setting TGR Relay Word bit SG5 logical 1 Inputs IN101 and IN103 are energized and IN102 is deenergized SS5 IN103 IN102 IN101 IN103 NOT IN102 IN101 logical 1 NOT logical 0 log...

Page 280: ...oup active when power is restored Settings Change If individual settings are changed for the active setting group or one of the other setting groups the active setting group is retained much like in the preceding Power Loss explanation If individual settings are changed for a setting group other than the active setting group there is no interruption of the active setting group the relay is not mom...

Page 281: ...rough SS6 before changing the active setting group If optoisolated inputs IN101 through IN106 are used in settings SS1 through SS6 the inputs have their own built in debounce timer that can help in providing the necessary time qualification see Figure 7 1 SELOGIC CONTROL EQUATION VARIABLES TIMERS Sixteen 16 SELOGIC control equation variables timers are available Each SELOGIC control equation varia...

Page 282: ...l equation settings a SELOGIC control equation timer may be used for a simple breaker failure scheme SV1 TRIP The TRIP Relay Word bit is run through a timer for breaker failure timing Timer pickup setting SV1PU is set to the breaker failure time SV1PU 12 cycles Timer dropout setting SV1DO is set for a 2 cycle dropout SV1DO 2 cycles The output of the timer Relay Word bit SV1T operates output contac...

Page 283: ...equal to Relay Word bit SV7 SELOGIC control equation variable SV7 SV7 SV7 IN101 50P1 50G1 Optoisolated input IN101 functions as a breaker failure initiate input Phase instantaneous overcurrent element 50P1 and residual ground instantaneous overcurrent element 50G1 function as fault detectors Timer pickup setting SV6PU provides retrip delay if desired can be set to zero Timer dropout setting SV6DO ...

Page 284: ...ngs Are Changed or Active Setting Group Is Changed If power is lost to the relay settings are changed for the active setting group or the active setting group is changed the SELOGIC control equation variables timers are reset Relay Word bits SVn and SVnT n 1 through 16 are reset to logical 0 and corresponding timer settings SVnPU and SVnDO load up again after power restoration settings change or a...

Page 285: ...C control equation evaluates to logical 1 for one of these contacts the relay closes normally open contacts a and opens normally closed contacts b as shown in Figure 7 26 The PULSE command also controls contact outputs For example if SELOGIC control equation OUT101 is set to OUT101 TRIP when Relay Word bit TRIP asserts the control coil for OUT101 is energized and OUT101 closes if it is a normally ...

Page 286: ...gh OUT206 The SEL 311L Relay contains six special high speed contacts OUT201 through OUT206 intended for use as trip contacts by the line current differential protection These contacts close less than 10 microseconds after their control coil is energized via setting EHST OUT201 through OUT206 are rated to interrupt trip current which helps avoid the added delay caused by tripping auxiliary relays ...

Page 287: ...rol equations OUT201 through OUT206 11 milliseconds Refer to the first row of Table 7 8 Line current differential protection via setting EHST is fastest because the same 87L hardware that performs 87L protection also controls contacts OUT201 through OUT206 The relay typically trips via setting EHST less than 1 cycle after an internal fault occurs Refer to the third row of Table 7 8 Use SELOGIC con...

Page 288: ...7 36 Inputs Outputs Timers and Other Control Logic Date Code 20010625 SEL 311L Instruction Manual Figure 7 27 Logic Flow for Example Output Contact Operation OUT201 OUT206 ...

Page 289: ...s than 10 microseconds after the line current differential protection detects an internal fault resulting in a typical tripping time less than one cycle As a reminder that OUT201 and OUT202 are enabled for high speed tripping it is permissible to put the TRIP87 bit in the corresponding SELOGIC control equations OUT201 TRIP87L OUT202 TRIP87L This does not change how the relay operates it only serve...

Page 290: ...current differential hardware use some of contacts OUT101 through OUT107 as separate backup protection tripping contacts as described in the next section High Speed 87L Tripping with Separate Backup Protection Tripping Example 3 Contacts OUT101 through OUT107 and the ALARM as well as all backup protection and control functions continue to operate even if there is a problem in the dedicated line cu...

Page 291: ... OUT202 Trip Coil 2 52a2 DWG M311L069 OUT101 OUT102 Figure 7 29 High Speed Trip Contact Connections Example 3 87L Tripping Coordinated with Tapped Load Protection Example 4 The SEL 311L Relay contains instantaneous and inverse time overcurrent elements that operate on total line current the vector sum of the currents measured at all line terminals Use these T50 and T51 see Figure 3 20 through Figu...

Page 292: ... the delayed 87L protection for use with later shots using a SELOGIC Timer Variable OUT201 TRIP OUT202 TRIP TR TRIP87 SH0 SV1T T51PT T51QT T50PT T50QT SV1 TRIP87 Delay SV1T assertion for the maximum expected clearing time for a fault downstream of the tapped load fuse e g SV1PU 60 SV1DP 0 Finally torque control the tapped load coordination elements to operate only for internal faults T51PTC 87LA 8...

Page 293: ...m assertion voltage per unit of nominal dc control voltage minimum pickup time milliseconds to energize the load at nominal control voltage and load resistance Use OUT201 OUT206 with any load that satisfies Equation 7 1 and does not assert below 20 of nominal dc control voltage pu L T 500 R Equation 7 1 where RL is the load resistance in k8 Tpu is the minimum load response time in milliseconds For...

Page 294: ...RM output contact coil states energized or deenergized and output contact types a or b are demonstrated See Output Contact Jumpers in Section 2 Installation for output contact type options Contact output OUT107 can be configured in one of the following ways v Use it as a regular contact similar to OUT101 through OUT106 by placing jumper JMP23 in position 2 3 v Use it as an extra relay alarm by pla...

Page 295: ... Figure 7 31 the 79 ENABLED panel light illuminates when the 79 Enable switch is closed When the 79 Enable switch is open the 79 ENABLED panel light extinguishes and it is understood that the reclosing relay is disabled Circuit Breaker Status Indication In Figure 7 31 the BREAKER CLOSED panel light illuminates when the 52a circuit breaker auxiliary contact is closed When the 52a circuit breaker au...

Page 296: ...Setting the Relay and Section 10 Line Current Differential Communications and Serial Port Communications and Commands These text settings are displayed on the SEL 311L Relay front panel display on a time variable rotation using Global setting SCROLD see Rotating Default Display in Section 11 Front Panel Interface for more specific operation information The following settings examples use optoisola...

Page 297: ...nel display Reclosing Relay Disabled In Figure 7 32 optoisolated input IN102 is deenergized to disable the reclosing relay resulting in DP1 IN102 logical 0 This results in the display of corresponding text setting DP1_0 on the front panel display 4 Circuit Breaker Status Indication Make SELOGIC control equation display point setting DP2 DP2 IN101 Make corresponding complementary text settings DP2_...

Page 298: ...ng DP2_0 on the front panel display 3 3 01 Additional Settings Examples Display Only One Message To display just one screen but not its complement set only one of the text settings For example to display just the breaker closed condition but not the breaker open condition make the following settings DP2 IN101 52a circuit breaker auxiliary contact connected to input IN101 see Figure 7 32 DP2_1 BREA...

Page 299: ...orresponding text setting For example if an SEL 311L Relay is protecting a 230 kV transmission line labeled Line 1204 the line name can be continually displayed with the following settings DP5 1 set directly to logical 1 DP5_1 LINE 1204 displays when DP5 logical 1 DP5_0 blank This results in the continual display of text setting DP5_1 on the front panel display This can also be realized with the f...

Page 300: ... setting DP1 IN102 Text settings DP1_1 79 ENABLED displayed when DP1 logical 1 DP1_0 79 DISABLED displayed when DP1 logical 0 Reclosing Relay Enabled In Figure 7 32 optoisolated input IN102 is energized to enable the reclosing relay resulting in DP1 IN102 logical 1 This results in the display of corresponding text setting DP1_1 on the front panel display Reclosing Relay Disabled In Figure 7 32 opt...

Page 301: ...equation settings 79DTL 1 set directly to logical 1 reclosing relay permanently driven to lockout DP1 0 set directly to logical 0 Text settings remain the same for all setting groups DP1_1 79 ENABLED displayed when DP1 logical 1 DP1_0 79 DISABLED displayed when DP1 logical 0 Because SELOGIC control equation display point setting DP1 is always at logical 0 the corresponding text setting DP1_0 conti...

Page 302: ......

Page 303: ...8 Operation of Station DC Battery Monitor When AC Voltage Is Powering the Relay 8 19 Metering 8 20 Instantaneous Metering 8 20 Local Demand Metering 8 22 Comparison of Thermal and Rolling Demand Meters 8 22 Demand Meter Settings 8 26 Demand Current Logic Output Application Raise Pickup for Unbalance Current 8 27 View or Reset Demand Metering Information 8 30 Demand Metering Updating and Storage 8 ...

Page 304: ...0 Percent Wear 8 10 Figure 8 7 Breaker Monitor Accumulates 100 Percent Wear 8 11 Figure 8 8 Input IN106 Connected to Trip Bus for Breaker Monitor Initiation 8 14 Figure 8 9 DC Under and Overvoltage Elements 8 15 Figure 8 10 Create DC Voltage Elements With SELOGIC Control Equations 8 16 Figure 8 11 Instantaneous Metering Local and Remote 8 20 Figure 8 12 Instantaneous Meter Display for Local Quanti...

Page 305: ...is enabled with the enable setting EBMON Y The breaker monitor settings in Table 8 2 are available via the SET G and SET L commands see Table 9 1 in Section 9 Setting the Relay and also the Settings Sheet at the end of Section 9 Also refer to BRE Command Breaker Monitor Data and BRE n Command Preload Reset Breaker Wear in Section 10 Line Current Differential Communications and Serial Port Communic...

Page 306: ... breaker maintenance information in Table 8 1 is plotted in Figure 8 1 Connect the plotted points in Figure 8 1 for a breaker maintenance curve To estimate this breaker maintenance curve in the SEL 311L Relay breaker monitor three set points are entered Set Point 1 maximum number of close open operations with corresponding current interruption level Set Point 2 number of close open operations that...

Page 307: ...Date Code 20010625 Breaker Monitor and Metering Functions 8 3 SEL 311L Instruction Manual Figure 8 1 Plotted Breaker Maintenance Points for an Example Circuit Breaker ...

Page 308: ...P1 b 100 The following settings are made from the breaker maintenance information in Table 8 1 and Figure 8 1 COSP1 10000 COSP2 150 COSP3 12 KASP1 1 20 KASP2 8 00 KASP3 20 00 Figure 8 2 shows the resultant breaker maintenance curve Breaker Maintenance Curve Details In Figure 8 2 note that set points KASP1 COSP1 and KASP3 COSP3 are set with breaker maintenance information from the two extremes in T...

Page 309: ...Date Code 20010625 Breaker Monitor and Metering Functions 8 5 SEL 311L Instruction Manual Figure 8 2 SEL 311L Relay Breaker Maintenance Curve for an Example Circuit Breaker ...

Page 310: ... logical 0 to logical 1 transition as the indication to read in current values The acquired current values are then applied to the breaker maintenance curve and the breaker monitor accumulated currents trips For example the SELOGIC control equation breaker monitor initiation setting may be set BKMON TRIP TRIP is the logic output of Figures 5 1 and 5 4 Refer to Figure 8 3 When BKMON asserts Relay W...

Page 311: ...ed 290 times 290 close open operations 480 190 pushing the breaker maintenance curve from the 10 percent wear level to the 25 percent wear level Compare the 100 percent and 25 percent curves and note that for a given current value the 25 percent curve has only 1 4 of the close open operations of the 100 percent curve 25 Percent to 50 Percent Breaker Wear Refer to Figure 8 6 The current value chang...

Page 312: ...8 8 Breaker Monitor and Metering Functions Date Code 20010625 SEL 311L Instruction Manual Figure 8 4 Breaker Monitor Accumulates 10 Percent Wear ...

Page 313: ...Date Code 20010625 Breaker Monitor and Metering Functions 8 9 SEL 311L Instruction Manual Figure 8 5 Breaker Monitor Accumulates 25 Percent Wear ...

Page 314: ...8 10 Breaker Monitor and Metering Functions Date Code 20010625 SEL 311L Instruction Manual Figure 8 6 Breaker Monitor Accumulates 50 Percent Wear ...

Page 315: ...Date Code 20010625 Breaker Monitor and Metering Functions 8 11 SEL 311L Instruction Manual Figure 8 7 Breaker Monitor Accumulates 100 Percent Wear ...

Page 316: ...eaker Monitor Data in Section 10 Line Current Differential Communications and Serial Port Communications and Commands The BRE command displays the following information v Accumulated number of relay initiated trips v Accumulated interrupted current from relay initiated trips v Accumulated number of externally initiated trips v Accumulated interrupted current from externally initiated trips v Perce...

Page 317: ...s current and trip count information accumulated Under relay initiated trips or externally initiated trips To make this determination the status of the TRIP Relay Word bit is checked at the instant BKMON newly asserts TRIP is the logic output of Figure 5 4 If TRIP is asserted TRIP logical 1 the current and trip count information is accumulated under relay initiated trips Rly Trips If TRIP is deass...

Page 318: ...BKMON is newly asserted input IN106 energized the TRIP Relay Word bit is asserted Thus the current and trip count information is accumulated under relay initiated trips Rly Trips If EHST N placing TRIP87 in the TR equation assures a differential trip is counted as a relay initiated trip If the control switch trip or some other external trip asserts energizing the trip bus the breaker monitor will ...

Page 319: ...battery monitor compares the measured station battery voltage Vdc to the undervoltage low and overvoltage high pickups DCLOP and DCHIP The setting range for pickup settings DCLOP and DCHIP is OFF 20 to 300 Vdc 01 Vdc increments This range allows the SEL 311L Relay to monitor nominal battery voltages of 24 48 110 125 and 250 V When testing the pickup settings DCLOP and DCHIP do not operate the SEL ...

Page 320: ...ELOGIC Control Equations DCLO DCHI Top of Figure 8 10 Output contact OUT106 asserts when Vdc b DCLOP or Vdc r DCHIP Pickup settings DCLOP and DCHIP are set such that output contact OUT106 asserts when dc battery voltage goes below or above allowable limits If the relay loses power entirely Vdc 0 Vdc Vdc DCLOP then output contact OUT106 should logically assert according to top of Figure 8 10 but ca...

Page 321: ...b needed for output contact OUT106 in the bottom of Figure 8 10 dc voltage alarm example If SELOGIC control equation setting OUT106 is asserted OUT106 SV4T logical 1 dc voltage OK the state of output contact OUT106 according to contact type is closed a type output contact open b type output contact If SELOGIC control equation setting OUT106 is deasserted OUT106 SV4T logical 0 dc voltage not OK the...

Page 322: ...Standard Event Reports and SER The station dc battery voltage is displayed in column Vdc in the example event report in Figure 12 4 Changes in station dc battery voltage for an event e g circuit breaker tripping can be observed Use the EVE command to retrieve event reports as discussed in Section 12 Station DC Battery Voltage Dips During Circuit Breaker Tripping Event reports are automatically gen...

Page 323: ...ectly in the SELOGIC control equation event report generation setting ER SV4T Timer output SV4T is an example dc voltage element from the bottom of Figure 8 10 Any time dc voltage falls below pickup DCHIP timer output SV4T drops out logical 1 to logical 0 transition creating a falling edge condition that generates an event report Also the Sequential Event Recorder SER report can be used to time ta...

Page 324: ...se voltage if it is greater than 13V secondary If the A phase voltage is 13V or less the angles are referenced to the local A phase current INSTANTANEOUS METERING The instantaneous metering in SEL 311L Relay provides the quantities shown below 5 5 3 3 TFUUJOH BUF NN EE ZZ 5JNF II NN TT TTT 5 TFUUJOH PDBM 1SJ YYYY YYY YYYY YYY YYYY YYY YYYY YYY YYYY YYY YYYY YYY YYY YY YYY YY YYY YY YYY YY YYY YY Y...

Page 325: ... Sum of currents always represents the total current entering the protected line Vector Sum is not reported when the terminal configuration is 3R Channel X and Channel Y quantities always represent the currents received from the remote relays connected to those respective channels Figure 8 12 below shows the instantaneous meter display for other local quantities 5 5 3 3 TFUUJOH BUF NN EE ZZ 5JNF I...

Page 326: ...ides local demand and local peak demand metering for the following values Currents IA B C IG 3I2 Input currents A primary Residual ground current A primary IG 3I0 IA IB IC Negative sequence current A primary Power MWA B C 3P MVARA B C 3P Single and three phase megawatts Single and three phase megavars Depending on enable setting EDEM these demand and peak demand values are thermal demand or rollin...

Page 327: ...Date Code 20010625 Breaker Monitor and Metering Functions 8 23 SEL 311L Instruction Manual Figure 8 13 Response of Thermal and Rolling Demand Meters to a Step Input Setting DMTC 15 Minutes ...

Page 328: ...p current input top In general just as voltage VC across the capacitor in Figure 8 14 cannot change instantaneously the thermal demand meter response cannot change instantaneously for increasing or decreasing current The thermal demand meter response time is based on the demand meter time constant setting DMTC see Table 8 3 Note in Figure 8 13 the thermal demand meter response middle is at 90 perc...

Page 329: ...y step calculation of the rolling demand response example in Figure 8 13 bottom Time 0 Minutes Presume that the instantaneous current has been at zero for quite some time before Time 0 minutes or the demand meters were reset The three 5 minute intervals in the sliding time window at Time 0 minutes each integrate into the following 5 minute totals 5 Minute Totals Corresponding 5 Minute Interval 0 0...

Page 330: ...ch integrate into the following 5 minute totals 5 Minute Totals Corresponding 5 Minute Interval 1 0 per unit 0 to 5 minutes 1 0 per unit 5 to 10 minutes 1 0 per unit 10 to 15 minutes 3 0 per unit Rolling demand meter response at Time 15 minutes 3 0 3 1 0 per unit Demand Meter Settings Enable Demand Meter EDEM is not visible in application settings 87L 87L21 and 87L21P Table 8 3 Demand Meter Settin...

Page 331: ...ent meter outputs as shown in Figure 8 15 For example when residual ground demand current IG DEM goes above corresponding demand pickup GDEMP Relay Word bit GDEM asserts to logical 1 Use these demand current logic outputs PDEM GDEM and QDEM to alarm for high loading or unbalance conditions Use in other schemes such as the following example Figure 8 15 Demand Current Logic Outputs Demand Current Lo...

Page 332: ...re 8 15 Figure 8 16 and Figure 3 24 Figure 8 16 Raise Pickup of Residual Ground Time Overcurrent Element for Unbalance Current Residual Ground Demand Current Below Pickup GDEMP When unbalance current IG is low unbalance demand current IG DEM is below corresponding demand pickup GDEMP 1 00 A secondary and Relay Word bit GDEM is deasserted to logical 0 This results in SELOGIC control equation torque...

Page 333: ...ary and Relay Word bit GDEM asserts to logical 1 This results in SELOGIC control equation torque control setting 51GTC being in the state 51GTC GDEM GDEM 50G2 NOT GDEM GDEM 50G2 NOT logical 1 logical 1 50G2 logical 0 50G2 50G2 Thus the residual ground time overcurrent element 51GT operates with an effective less sensitive pickup 50G2P 2 30 A secondary The reduced sensitivity keeps the residual gro...

Page 334: ...ure 11 2 in Section 11 Front Panel Interface Demand Metering Updating and Storage The SEL 311L Relay updates demand values approximately every 2 seconds The relay stores peak demand values to nonvolatile storage once per day it overwrites the previous stored value if it is exceeded Should the relay lose control power it will restore the peak demand values saved by the relay at 23 50 hours on the p...

Page 335: ... 23 50 hours on the previous day LOCAL MAXIMUM MINIMUM METERING View or Reset Maximum Minimum Metering Information Via Serial Port See MET Command Metering Data MET M Maximum Minimum Metering in Section 10 Line Current Differential Communications and Serial Port Communications and Commands The MET M command displays maximum minimum metering for the following values Currents IA B C IG IP Input curr...

Page 336: ... values Maximum minimum recording resumes 1 minute after FAULT deasserts v The metering value is above the previous maximum or below the previous minimum for 2 cycles v For voltage values the voltage is above 13 V secondary v For current values the currents are above 0 25 A secondary 5 A nominal 0 05 A secondary 1 A nominal v Megawatt and megavar values are subject to the above voltage and current...

Page 337: ...he SEL 311L Relay 9 57 TABLES Table 9 1 Serial Port SET Commands 9 1 Table 9 2 Set Command Editing Keystrokes 9 2 Table 9 3 SEL 311L Relay Word Bits 9 7 Table 9 4 Relay Word Bit Definitions for the SEL 311L 9 9 Table 9 6 Model Power System Data 9 38 Table 9 7 Primary Fault Study Data as Seen by Terminal S Differential Current in Parentheses 9 39 FIGURES Figure 9 1 U S Moderately Inverse Curve U1 9...

Page 338: ......

Page 339: ...nt panel default display and local control text 25 28 SET P m Port Serial port settings for Serial Port m m 1 2 3 or F 29 SET X Channel Differential communications Channel X settings 30 SET Y Channel Differential communications Channel Y settings 30 Located at the end of this section View settings with the respective serial port SHOWSET commands SHO SHO L SHO G SHO R SHO T SHO P SHO X and SHO Y Se...

Page 340: ...he existing setting Editing keystrokes are shown in Table 9 2 Table 9 2 Set Command Editing Keystrokes Press Key s Results ENTER Retains setting and moves to the next setting ENTER Returns to previous setting ENTER Returns to previous section ENTER Moves to next section END ENTER Exits editing session then prompts you to save the settings CTRL X Aborts editing session without saving changes The re...

Page 341: ...Figure 9 10 represent IEC defined relay curves tp operating time in seconds tr electromechanical induction disk emulation reset time in seconds if electromechanical reset setting is made TD time dial setting M applied multiples of pickup current for operating time tp M 1 for reset time tr M 1 U S Moderately Inverse Curve U1 U S Inverse Curve U2 tp TD 0 0226 0 0104 M 0 02 1 tp TD 0 180 5 95 M 2 1 t...

Page 342: ...g the Relay Date Code 20010625 SEL 311L Instruction Manual Figure 9 1 U S Moderately Inverse Curve U1 Figure 9 2 U S Inverse Curve U2 Figure 9 3 U S Very Inverse Curve U3 Figure 9 4 U S Extremely Inverse Curve U4 ...

Page 343: ... Code 20010625 Setting the Relay 9 5 SEL 311L Instruction Manual Figure 9 5 U S Short Time Inverse Curve U5 Figure 9 6 I E C Class A Curve Standard Inverse C1 Figure 9 7 I E C Class B Curve Very Inverse C2 ...

Page 344: ... 90 100 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 01 02 03 04 05 06 07 08 09 100 1 2 3 4 5 6 7 8 9 5 6 7 8 9 90 80 70 60 50 40 30 20 10 Time in Seconds Time in Cycles 60 Hz 50Hz 6000 5000 3000 2500 1500 1250 600 500 300 250 150 125 60 50 30 25 15 12 5 6 5 3 2 5 DWG M300G153 Multiples of Pickup 0 05 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 0 90 1 00 Figure 9 10 I E C Short Time Inverse Curve C5 ...

Page 345: ...T 4 51G 51GT 51GR LOP ILOP ZLOAD ZLOUT ZLIN 5 LB1 LB2 LB3 LB4 LB5 LB6 LB7 LB8 6 LB9 LB10 LB11 LB12 LB13 LB14 LB15 LB16 7 RB1 RB2 RB3 RB4 RB5 RB6 RB7 RB8 8 RB9 RB10 RB11 RB12 RB13 RB14 RB15 RB16 9 LT1 LT2 LT3 LT4 LT5 LT6 LT7 LT8 10 LT9 LT10 LT11 LT12 LT13 LT14 LT15 LT16 11 SV1 SV2 SV3 SV4 SV1T SV2T SV3T SV4T 12 SV5 SV6 SV7 SV8 SV5T SV6T SV7T SV8T 13 SV9 SV10 SV11 SV12 SV9T SV10T SV11T SV12T 14 SV13...

Page 346: ...1D1T 81D2T 81D3T 81D4T 81D5T 81D6T 87HWAL 87BSY 54 OUT201 OUT202 OUT203 OUT204 OUT205 OUT206 87LPE DD 55 FTABC FTAG FTBG FTCG FTAB FTBC FTCA FTSE 56 87L 87LA 87LB 87LC 87L2 87LG CHYAL CHXAL 57 87LOPA 87LAE R87LA CTAA PQ87LA TRIP87 BXYZ2 BXYZG 58 87LOPB 87LBE R87LB CTAB PQ87LB BXYZA BXYZB BXYZC 59 87LOPC 87LCE R87LC CTAC PQ87LC T51PT T50P T50PT 60 87LOP2 87L2E R87L2 B87L2 PQ87L2 T51QT T50Q T50QT 61...

Page 347: ...ual ground element tripped for fault or residual ground current above pickup of residual ground element at time of trip ZONE1 Fault in Zone 1 Level 1 ZONE2 Fault in Zone 2 Level 2 ZONE3 Fault in Zone 3 Level 3 87CHFAIL Differential Channel Failure 2 M1P Zone 1 phase distance instantaneous see Figure 3 29 Tripping Control M1PT Zone 1 phase distance time delayed see Figure 3 39 Z1G Zone 1 mho and or...

Page 348: ...stantaneous overcurrent element residual ground current above pickup setting 50G1P see Figure 3 45 67G1 Level 1 torque controlled residual ground instantaneous overcurrent element derived from 50G1 see Figure 3 45 67G1T Level 1 residual ground definite time overcurrent element 67G1T timed out derived from 67G1 see Figure 3 45 4 51G Residual ground current above pickup setting 51GP for residual gro...

Page 349: ...ted see Figure 7 3 Local control via front panel replacing traditional panel mounted control switches 6 LB9 LB10 LB11 LB12 LB13 LB14 LB15 LB16 Local Bit 9 asserted see Figure 7 3 Local Bit 10 asserted see Figure 7 3 Local Bit 11 asserted see Figure 7 3 Local Bit 12 asserted see Figure 7 3 Local Bit 13 asserted see Figure 7 3 Local Bit 14 asserted see Figure 7 3 Local Bit 15 asserted see Figure 7 3...

Page 350: ...Latch Bit 6 asserted see Figure 7 11 Latch Bit 7 asserted see Figure 7 11 Latch Bit 8 asserted see Figure 7 11 Latched control replacing traditional latching relays 10 LT9 LT10 LT11 LT12 LT13 LT14 LT15 LT16 Latch Bit 9 asserted see Figure 7 11 Latch Bit 10 asserted see Figure 7 11 Latch Bit 11 asserted see Figure 7 11 Latch Bit 12 asserted see Figure 7 11 Latch Bit 13 asserted see Figure 7 11 Latc...

Page 351: ...ut SV7 asserted see Figure 7 24 SELOGIC control equation variable timer input SV8 asserted see Figure 7 24 Testing Seal in functions etc see Figure 7 25 SV5T SELOGIC control equation variable timer output SV5T asserted see Figure 7 23 Control SV6T SELOGIC control equation variable timer output SV6T asserted see Figure 7 23 SV7T SELOGIC control equation variable timer output SV7T asserted see Figur...

Page 352: ...le timer input SV16 asserted see Figure 7 24 Testing Seal in functions etc see Figure 7 25 SV13T SELOGIC control equation variable timer output SV13T asserted see Figure 7 24 Control SV14T SELOGIC control equation variable timer output SV14T asserted see Figure 7 24 SV15T SELOGIC control equation variable timer output SV15T asserted see Figure 7 24 SV16T SELOGIC control equation variable timer out...

Page 353: ...e element see Figure 8 34 17 BCW BCWA BCWB BCWC BCWA A phase breaker contact wear has reached 100 wear level see Breaker Monitor in Section 8 BCWB B phase breaker contact wear has reached 100 wear level see Breaker Monitor in Section 8 BCWC C phase breaker contact wear has reached 100 wear level see Breaker Monitor in Section 8 FIDEN 311L Main Board Fault Identification Logic Enabled This Relay Wo...

Page 354: ...ARGET RESET Pushbutton is pushed or the TAR R serial port command is executed see Figure 5 1 Figure 5 4 and Figure 5 19 52A Circuit breaker status asserts to logical 1 when circuit breaker is closed see Figure 6 1 3PO Three pole open condition see Figure 5 5 SOTFE Switch onto fault condition see Figure 5 5 VPOLV Positive sequence polarization voltage valid see Figure 3 29 through Figure 3 37 and F...

Page 355: ...tional element see Figure 4 5 and Figure 4 7 32QGE Enable for negative sequence voltage polarized directional element see Figure 4 5 and Figure 4 6 32IE Enable for channel IP current polarized directional element see Figure 4 5 and Figure 4 7 32QE Enable for negative sequence voltage polarized directional element see Figure 4 13 and Figure 4 14 22 F32I Forward channel IP current polarized directio...

Page 356: ...ct OUT107 asserted see Figure 7 26 OUT106 Output contact OUT106 asserted see Figure 7 26 OUT105 Output contact OUT105 asserted see Figure 7 26 OUT104 Output contact OUT104 asserted see Figure 7 26 OUT103 Output contact OUT103 asserted see Figure 7 26 OUT102 Output contact OUT102 asserted see Figure 7 26 OUT101 Output contact OUT101 asserted see Figure 7 26 25 M3P Zone 3 phase distance instantaneou...

Page 357: ...d phase instantaneous overcurrent element derived from 50P3 see Figure 3 42 67P3T Level 3 phase definite time overcurrent element 67P3T timed out derived from 67P3 see Figure 3 42 27 50G2 Level 2 residual ground instantaneous overcurrent element residual ground current above pickup setting 50G2P see Figure 3 45 67G2 Level 2 torque controlled residual ground instantaneous overcurrent element derive...

Page 358: ...BC3 Mho BC phase distance zone 3 instantaneous see Figure 3 31 MCA3 Mho CA phase distance zone 3 instantaneous see Figure 3 31 29 MAG3 Mho ground distance A phase zone 3 see Figure 3 34 MBG3 Mho ground distance B phase zone 3 see Figure 3 34 MCG3 Mho ground distance C phase zone 3 see Figure 3 34 27S Channel VS instantaneous undervoltage element channel VS voltage below pickup setting 27SP see Fig...

Page 359: ...he Reclose Cycle State see Figure 6 5 79LO Reclosing relay in the Lockout State see Figure 6 5 SH0 Reclosing relay shot counter 0 see Table 6 3 SH1 Reclosing relay shot counter 1 see Table 6 3 SH2 Reclosing relay shot counter 2 see Table 6 3 SH3 Reclosing relay shot counter 3 see Table 6 3 SH4 Reclosing relay shot counter 4 see Table 6 3 32 MAB4 Mho AB phase distance zone 4 instantaneous see Figur...

Page 360: ...ase zone 2 see Figure 3 36 XAG3 Quadrilateral ground distance A phase zone 3 see Figure 3 37 XBG3 Quadrilateral ground distance B phase zone 3 see Figure 3 37 34 XCG3 Quadrilateral ground distance C phase zone 3 see Figure 3 37 XAG4 Quadrilateral ground distance A phase zone 4 see Figure 3 37 XBG4 Quadrilateral ground distance B phase zone 4 see Figure 3 37 XCG4 Quadrilateral ground distance C pha...

Page 361: ...1 UBOSB Unblock out of step blocking see Figure 3 40 36 50G4 Level 4 residual ground instantaneous overcurrent element residual ground current above pickup setting 50G4P see Figure 3 45 Tripping 67G4 Level 4 torque controlled residual ground instantaneous overcurrent element derived from 50G4 see Figure 3 45 67G4T Level 4 residual ground definite time overcurrent element 67G4T timed out derived fr...

Page 362: ...out derived from 67Q2 see Figure 3 46 59N1 Zero sequence instantaneous overvoltage element zero sequence voltage above pickup setting 59N1P see Figure 3 51 59N2 Zero sequence instantaneous overvoltage element zero sequence voltage above pickup setting 59N2P see Figure 3 51 38 50Q31 Level 3 negative sequence instantaneous overcurrent element negative sequence current above pickup setting 50Q3P see ...

Page 363: ...igure 3 49 Testing Z2PGS Zone 2 phase and ground short delay element DCB Logic 67QG2S Negative sequence and residual directional overcurrent short delay element See Figure 5 16 BTX Block extension picked up 40 Z3XT Current reversal guard timer picked up DSTRT Directional start element picked up NSTRT Nondirectional start element picked up STOP Stop element picked up Z3RB Current reversal guard ass...

Page 364: ... 59P see Figure 3 50 59C C phase instantaneous overvoltage element C phase voltage above pickup setting 59P see Figure 3 50 3P27 27A 27B 27C see Figure 3 50 3P59 59A 59B 59C see Figure 3 50 43 27AB AB phase to phase instantaneous undervoltage element AB phase to phase voltage below pickup setting 27PP see Figure 3 51 27BC BC phase to phase instantaneous undervoltage element BC phase to phase volta...

Page 365: ...Figure 7 27 204LOG SELOGIC control equation OUT20n evaluates to Logical 1 see Figure 7 27 205LOG SELOGIC control equation OUT20n evaluates to Logical 1 see Figure 7 27 206LOG SELOGIC control equation OUT20n evaluates to Logical 1 see Figure 7 27 45 Tripping MPP3 Zone 3 phase to phase compensator distance element see Figure 3 31 MABC3 Zone 3 three phase compensator distance element see Figure 3 31 ...

Page 366: ...annel A transmit bit 6 TMB5A Channel A transmit bit 5 TMB4A Channel A transmit bit 4 TMB3A Channel A transmit bit 3 TMB2A Channel A transmit bit 2 TMB1A Channel A transmit bit 1 49 RMB8B Channel B received bit 8 RMB7B Channel B received bit 7 RMB6B Channel B received bit 6 RMB5B Channel B received bit 5 RMB4B Channel B received bit 4 RMB3B Channel B received bit 3 RMB2B Channel B received bit 2 RM...

Page 367: ...ata OK 52 81D1 Level 1 instantaneous frequency element with corresponding pickup setting 81D1P see Figure 3 57 Testing 81D2 Level 2 instantaneous frequency element with corresponding pickup setting 81D2P see Figure 3 57 81D3 Level 3 instantaneous frequency element with corresponding pickup setting 81D3P see Figure 3 57 81D4 Level 4 instantaneous frequency element with corresponding pickup setting ...

Page 368: ... timed out derived from 81D6 see Figure 3 57 87HWAL Differential board self test alarm 87BSY Differential board self test alarm 54 OUT201 State of output contact OUT201 see Figure 7 27 OUT202 State of output contact OUT202 see Figure 7 27 OUT203 State of output contact OUT203 see Figure 7 27 OUT204 State of output contact OUT204 see Figure 7 27 OUT205 State of output contact OUT205 see Figure 7 27...

Page 369: ...lation enable see Figure 3 17 R87LA A Phase restrain region detection output Testing Control CTAA A Phase CT alarm level detector see Figure 3 17 PQ87LA Protection quality 87LA alarm see Figure 3 17 Alarming TRIP87 Line current differential trip logic output asserted see Figure 5 1 and Figure 5 4 Tripping BXYZ2 Negative sequence CT saturation and outfeed block BXYZG Zero sequence CT saturation and...

Page 370: ...urrent enable level detector see Figure 3 18 87L2E Negative sequence differential calculation enable see Figure 3 18 Testing Control R87L2 Negative sequence restrain region detection output see Figure 3 18 B87L2 Extended 87L2 block see Figure 3 18 PQ87L2 Protection quality 87L2 alarm Alarming T51QT Tapped load negative sequence time overcurrent element T51QT timed out see Figure 3 25 Tripping T50Q...

Page 371: ...ee Figure 3 17 RDTX Differential Channel X receive direct trip see Figure 5 1 Tripping TDTX Differential Channel X transmit direct trip see Figure 5 1 TESTX Differential Channel X in test mode see Section 10 Testing 3POX Differential Channel X receive three pole open see Figure 3 17 63 R4X Received Channel X bit 4 see Section 10 Control R3X Received Channel X bit 3 see Section 10 R2X Received Chan...

Page 372: ...tion 10 DBADX One way delay on Channel X exceeds setting DBADXP see Section 10 AVAX Channel X unavailability exceeds setting AVAXP see Section 10 RBADX Channel X dropout exceeds setting RBADXP see Section 10 ROKX Channel X instantaneous receive status see Section 10 66 50LA Local A phase overcurrent element output see Figure 3 17 Testing 50RA Remote A phase overcurrent element output see Figure 3 ...

Page 373: ...the settings sheets that follow include references for additional information The following explanations are for settings that do not have reference information anywhere else in the instruction manual Identifier Labels The SEL 311L Relay has two identifier labels the Relay Identifier RID and the Terminal Identifier TID The Relay Identifier is typically used to identify the relay or the type of pro...

Page 374: ... is unitless and corresponds to the line impedance settings For example if a particular line length is 15 miles enter the line impedance values Ω secondary and then enter the corresponding line length LL 15 00 miles If the same length of line is measured in kilometers rather than miles then enter LL 24 14 kilometers Enable Settings The enable settings E87L through EBMON control the setting subgrou...

Page 375: ...eme may be used on lower voltage applications such as 69 kV The primary protection is differential overcurrent with tapped load total overcurrent elements T50 T51 High speed differential elements 87L provide torque control for the tapped load elements T50 T51 elements are blocked until the corresponding 87L element asserts Backup step distance and single ended time overcurrent elements operate for...

Page 376: ...oltage 230 kV Transformer secondary line to line voltage 13 8 kV Nominal frequency 60 Hz Line lengths S t Section 1 t R Section 2 t T Section 3 10 miles 10 miles 15 miles Line impedances Z1L1 Z1L2 Z0L1 Z0L2 Z1L3 Z0L3 5 93 Ω 84 70 primary 19 33 Ω 73 00 primary 8 90 Ω 84 70 primary 28 00 Ω 73 00 primary 0 71 Ω 84 70 secondary 2 32 Ω 73 00 secondary 1 07 Ω 84 70 secondary 3 36 Ω 73 00 secondary Trans...

Page 377: ...nvert the impedances to secondary ohms as follows 12 0 2000 240 PTR CTR k Equation 9 1 Zsecondary k Zprimary Equation 9 2 For example Z1L1 secondary Z1L2 secondary k Z1L1 primary 0 12 5 93 Ω 84 7 0 71 Ω 84 7 Perform a system fault study with the transformers at base load during the study The load at Station S is 104 A at 25 1 degrees Total load on the tap is 144 4 A at 25 3 degrees Table 9 7 Prima...

Page 378: ...79 2 4535 5 80 8 18 3 83 8 BC 103 9 25 1 144 4 25 3 4110 4 175 8 5710 2 176 4020 1 4 9 5584 8 4 8 0 0 18 3 84 6 BCG 143 5 58 0 119 1 26 9 4428 6 169 2 6174 0 167 9 4036 3 21 5 5651 7 22 4 2252 4 103 3 3466 9 101 8 18 3 84 6 T secondary ABC 439 6 81 9 609 8 82 7 439 6 158 1 609 8 157 3 439 6 38 1 609 8 37 3 0 0 292 1 81 8 AG 239 4 98 9 329 8 100 3 103 9 145 1 144 4 145 3 320 2 67 6 443 9 66 4 0 0 4...

Page 379: ...DD N Set EHSDTT N The 87L elements are used only for tapped load element torque control High speed direct transfer trip is not required Disturbance detector supervision ensures the relay detects a change in the local currents before allowing a trip due to 87L element assertion Since the 87L elements are used for torque control in this example disturbance detect is not required Set EDD N Tapped loa...

Page 380: ...ish to avoid nuisance alarms Max Load Line Charging 1 1 CTR 216 1 1 240 0 99 A Restraint Region Characteristic Settings E87L 2 or 3 Outer Radius 2 0 8 0 87LR 6 0 87LR and 87LANG are used to set the relay Alpha Plane characteristic shown in Figure 3 3 The default value of 6 is satisfactory for most applications The setting can be reduced for improved sensitivity or increased for improved security S...

Page 381: ...his example use electromechanical reset emulation Tapped Load Phase Inst Def Time Overcurrent Element Settings Pickup OFF 0 50 16 00 A secondary T50PP 13 36 Set the tapped load phase instantaneous overcurrent element to quickly clear a line fault up to the transformer high side While this setting technically violates the trip saving philosophy since the relay can operate for a fault between the tr...

Page 382: ...ed load phase instantaneous overcurrent element does not see faults on the load transformer secondary Tapped Load Residual Ground Time Overcurrent Element Settings If ETG Y Pickup OFF 0 50 16 00 A secondary T51GP 2 0 Since the transformers are connected delta wye and T51G is a differential element T51G only asserts for faults on the transmission line Set the T51GP 2 0 A to detect a high resistance...

Page 383: ...Phase VA VB VC Potential Transformer Ratio 1 00 10000 00 PTR 2000 Synchronism Voltage VS Potential Transformer Ratio 1 00 10000 00 PTRS 2000 Set the potential transformer ratio PTR 2000 The synchronizing PTR setting PTRS is not used The setting may remain at the default value Line Parameter Settings See Settings Explanations Positive sequence line impedance magnitude 0 05 255 00 Ω secondary 5 A no...

Page 384: ...Settings Directional control Y AUTO see Directional Control Settings in Section 4 E32 AUTO Enable Best Choice Ground Directional Logic with E32 AUTO This automatically calculates and sets Z2F Z2R 50QFP 50QRP a2 k2 50GRP a0 Z0F and Z0R These settings must be made manually if E32 Y Out of Step Y N see Figure 3 41 EOOS N Out of step is not used in this example Set EOOS N to disable out of step elemen...

Page 385: ...e relay detects a Source Impedance Ratio SIR greater than five during a fault the relay delays Zone 1 tripping for up to 1 5 cycles allowing the CCVT to stabilize Other settings are not required The relay automatically adapts to different system SIR conditions and determines whether the 1 5 cycle delay is needed In this example the CCVTs use active ferroresonance suppression Set ECCVT Y SELOGIC co...

Page 386: ...ettings Zone 1 phase to phase current FD 0 5 170 00 Α secondary 5 A nom 0 1 34 00 Α secondary 1 A nom see Figure 3 29 50PP1 0 5 Set 50PP1 to its minimum value when LOP logic is enabled Mho Ground Distance Elements Zone 1 OFF 0 05 64 00 Ω secondary 5 A nom 0 25 320 00 Ω secondary 1 A nom see Figure 3 32 Z1MG 1 13 Set Z1MG to 75 90 of distance from Station S to Station R Z1MG Z1MAG 80 1 41 Ω 0 8 1 1...

Page 387: ... the same values Calculate Zone 1 zero sequence current compensation factor with either the primary or secondary values of the positive sequence and zero sequence line impedance 74 16 766 0 7 84 42 1 3 7 84 42 1 00 73 64 4 Z 3 Z Z 01 k 1 L 1 1 L 1 1 L 0 Mho Phase Distance Element Time Delays See Figure 3 39 Zone 1 time delay OFF 0 00 16000 00 cycles Z1PD OFF Zone 2 time delay OFF 0 00 16000 00 cyc...

Page 388: ... A asserts 51PT in the Zone 3 delay time of 20 cycles 6081 1 103 100 10 1 0 1 0 01 100 1 103 1 104 51P Overcurrent Protection Z2 Time Delay Primary Amps 51PT Max Phase Current at Station S for a Fault at Station R Time seconds M311L140 Residual Ground Time Overcurrent Element See Figure 3 48 Pickup OFF 0 50 16 00 A secondary 5 A nom 0 10 3 20 A secondary 1 A nom 51GP 2 0 Curve U1 U5 C1 C5 see Figu...

Page 389: ...ority combination of Q V or I ORDER QV Reclosing Relay See Tables 6 2 and 6 3 Make the following settings if preceding enable setting E79 1 4 Open interval 1 time 0 00 999999 00 cycles in 0 25 cycle steps 79OI1 17 17 Reset time from reclose cycle 0 00 999999 00 cycles in 0 25 cycle steps 79RSD 1800 Reset time from lockout 0 00 999999 00 cycles in 0 25 cycle steps 79RSLD 1800 Reclose supervision ti...

Page 390: ...an application that requires 87L elements for tripping OPO 27 can compromise logic that manages charging current inrush when a power line is energized Load detection phase pickup OFF 0 25 100 00A 5 A nom 0 05 20 00 A 1 A nom see Figure 5 5 50LP 0 25 Trip Logic Equations See Figure 5 1 Direct trip conditions TR M1P Z1G M3PT Z3GT 51PT 51GT T51PT T50P T51GT T50G OC Set the unconditional trip equation...

Page 391: ...ock reclosing during a manual breaker trip Drive to last shot 79DLS 0 Skip shot 79SKP 0 Stall open interval timing 79STL 0 Block reset timing 79BRS 0 Sequence coordination 79SEQ 0 Reclose supervision see Figure 6 2 79CLS 1 Reclose supervision is normally used with synchronized closing Set 79CLS 1 to allow reclosing to proceed after the open interval time out Torque Control Equations for Time Overc...

Page 392: ...rrupting applications Display Point Equations See Rotating Default Display in Sections 7 and 11 Display Point DP1 DP1 52A Display Point DP2 DP2 CHXAL Setting Group Selection Equations See Table 7 4 Select Setting Group 1 SS1 0 Select Setting Group 2 SS2 0 Select Setting Group 3 SS3 0 Select Setting Group 4 SS4 0 Select Setting Group 5 SS5 0 Select Setting Group 6 SS6 0 Other Equations Event report...

Page 393: ...ult Display in Section 7 and 11 Display if DP1 logical 1 16 characters DP1_1 BREAKER CLOSED Display if DP1 logical 0 16 characters DP1_0 BREAKER OPEN Display if DP2 logical 1 16 characters DP2_1 CHANNEL X ALARM Display if DP2 logical 0 16 characters DP2_0 Reclosing Relay Labels See Functions Unique to the Front Panel Interface in Section 11 Reclosing Relay Last Shot Label 14 char 79LL 0 Reclosing ...

Page 394: ...ets that follow include the definition and input range for each setting in the relay Refer to Relay Element Pickup Ranges and Accuracies in Section 1 Introduction and Specifications for information on 5 A nominal and 1 A nominal ordering options and how they influence overcurrent element setting ranges ...

Page 395: ...High speed tripping 1 6 N EHST If 87L 2 or 3 the following choices are available Enable high speed direct transfer trip Y N EHSDTT Enable disturbance detect Y N EDD Tapped load coordination Y N ETAP If the relay has two channels and E87L 2 or 3R Primary channel X Y PCHAN If the relay has two channels and E87L 2 Hot standby channel feature Y N EHSC If PCHAN X or EHSC Y or E87L 3 CTR at terminal con...

Page 396: ... 0 50 16 00 A secondary T51GP Curve U1 U5 C1 C5 T51GC Time dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 T51GTD Electromechanical reset delay Y N T51GRS Tapped Load Residual Ground Inst Def Time Overcurrent Element Settings Pickup OFF 0 50 16 00 A secondary T50GP Time delay OFF 0 00 16000 00 cycles T50GD Tapped Load Negative Sequence Time Overcurrent Element Settings If ETQ Y Pickup ...

Page 397: ...E21MG Quadrilateral ground distance element zones N 1 4 see Figures 3 32 3 34 E21XG Instantaneous Definite Time Overcurrent Enable Settings Phase element levels N 1 3 see Figure 3 42 E50P Residual ground element levels N 1 4 see Figure 3 45 E50G Negative sequence element levels N 1 4 see Figure 3 46 E50Q Time Overcurrent Enable Settings Phase element Y N see Figure 3 47 E51P Residual ground elemen...

Page 398: ...pendent on preceding enable setting E21P 1 4 Zone 1 OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom see Figure 3 29 Z1P Zone 2 OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom see Figure 3 30 Z2P Zone 3 OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom see Figure 3 31 Z3P Zone 4 OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom...

Page 399: ... setting E21XG 1 4 Zone 1 reactance OFF 0 05 64 00 W secondary 5 A nom OFF 0 25 320 00 W secondary 1 A nom see Figure 3 35 XG1 Zone 2 reactance OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom see Figure 3 36 XG2 Zone 3 reactance OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom see Figure 3 37 XG3 Zone 4 reactance OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W...

Page 400: ...50GZ1 ÝZone 2 residual current FD 0 50 100 00 A secondary 5 A nom 0 10 20 00 A secondary 1 A nom see Figures 3 33 and 3 36 50GZ2 ÝZone 3 residual current FD 0 50 100 00 A secondary 5 A nom 0 10 20 00 A secondary 1 A nom see Figures 3 34 and 3 37 50GZ3 ÝZone 4 residual current FD 0 50 100 00 A secondary 5 A nom 0 10 20 00 A secondary 1 A nom see Figures 3 34 and 3 37 50GZ4 Zero Sequence Compensatio...

Page 401: ...G 1 4 Zone 1 time delay OFF 0 00 16000 00 cycles Z1D Zone 2 time delay OFF 0 00 16000 00 cycles Z2D Zone 3 time delay OFF 0 00 16000 00 cycles Z3D Zone 4 time delay OFF 0 00 16000 00 cycles Z4D Phase Inst Def Time Overcurrent Elements See Figure 3 42 Number of phase element pickup settings dependent on preceding enable setting E50P 1 3 Level 1 OFF 0 25 100 00 A secondary 5 A nom 0 05 20 00 A secon...

Page 402: ...ps 67G2D Level 3 0 00 16000 00 cycles in 0 25 cycle steps 67G3D Level 4 0 00 16000 00 cycles in 0 25 cycle steps 67G4D Negative Sequence Inst Def Time Overcurrent Elements See Figure 3 46 Number of negative sequence element time delay settings dependent on preceding enable setting E50Q 1 4 Level 1 OFF 0 25 100 00 A secondary 5 A nom 0 05 20 00 A secondary 1 A nom 50Q1P Level 2 OFF 0 25 100 00 A se...

Page 403: ...romechanical Reset Y N 51GRS Negative Sequence Time Overcurrent Element See Figure 3 49 Make the following settings if preceding enable setting E51Q Y Pickup OFF 0 50 16 00 A secondary 5 A nom 0 10 3 20 A secondary 1 A nom 51QP Curve U1 U5 C1 C5 see Figures 9 1 through 9 10 51QC Time Dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 51QTD Electromechanical Reset Y N 51QRS IMPORTANT See A...

Page 404: ... Sequence current supervision 1 100 A secondary 5 A nom 0 2 20 A secondary 1 A nom 50ABCP Negative Sequence current unblock delay 0 5 120 0 cycles UBD ÝOut of Step angle change unblock rate 1 10 unitless UBOSBF Ý Indicates a setting is active when advanced user setting enable EADVS Y Otherwise setting is made automatically Load Encroachment Elements See Figure 4 3 Make the following settings if pr...

Page 405: ...nd ORDER contains V or I these settings are made automatically Forward directional 3I0 pickup 0 25 5 00 A secondary 5 A nom 0 05 1 00 A secondary 1 A nom 50GFP Reverse directional 3I0 pickup 0 25 5 00 A secondary 5 A nom 0 05 1 00 A secondary 1 A nom 50GRP Positive sequence current restraint factor I0 I1 0 02 0 50 unitless a0 Make settings Z0F and Z0R if preceding enable setting E32 Y and precedin...

Page 406: ...connected voltage inputs 27B81P Level 1 pickup OFF 41 00 65 00 Hz 81D1P Level 1 time delay 2 00 16000 00 cycles in 0 25 cycle steps 81D1D Level 2 pickup OFF 41 00 65 00 Hz 81D2P Level 2 time delay 2 00 16000 00 cycles in 0 25 cycle steps 81D2D Level 3 pickup OFF 41 00 65 00 Hz 81D3P Level 3 time delay 2 00 16000 00 cycles in 0 25 cycle steps 81D3D Level 4 pickup OFF 41 00 65 00 Hz 81D4P Level 4 ti...

Page 407: ...eps EBLKD Echo time delay pickup OFF 0 00 16000 00 cycles in 0 25 cycle steps ETDPU Echo duration time delay 0 00 16000 00 cycles in 0 25 cycle steps EDURD Weak infeed enable Y N EWFC WIF phase to phase undervoltage 0 0 260 0 V secondary 27PPW WIF zero sequence 3V0 overvoltage 0 0 150 0 V secondary 59NW Additional DCUB Trip Scheme Settings See Figure 5 12 Make the following settings if preceding e...

Page 408: ...Figure 6 1 CFD Three pole open time delay 0 00 60 00 cycles in 0 25 cycle steps usually set for no more than a cycle see Figure 5 5 3POD Open pole option 52 27 OPO Three pole open undervoltage 0 0 150 0 V secondary 27PO Load detection phase pickup OFF 0 25 100 00A 5 A nom 0 05 20 00 A 1 A nom see Figure 5 5 50LP SELOGIC Control Equation Variable Timers See Figures 7 23 and 7 24 Number of timer pic...

Page 409: ... SV10 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV10DO SV11 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV11PU SV11 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV11DO SV12 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV12PU SV12 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV12DO SV13 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV13PU SV13 D...

Page 410: ...s TRSOTF Direct transfer trip conditions DTT Unlatch trip conditions ULTR Communications Assisted Trip Scheme Input Equations Permissive trip 1 used for ECOMM POTT DCUB1 or DCUB2 see Figures 5 7 5 9 and 5 12 PT1 Loss of guard 1 used for ECOMM DCUB1 or DCUB2 see Figure 5 12 LOG1 Permissive trip 2 used for ECOMM DCUB2 see Figures 5 7 and 5 12 PT2 Loss of guard 2 used for ECOMM DCUB2 see Figure 5 12 ...

Page 411: ... Bit LT5 SET5 Reset Latch Bit LT5 RST5 Set Latch Bit LT6 SET6 Reset latch Bit LT6 RST6 Set Latch Bit LT7 SET7 Reset Latch Bit LT7 RST7 Set Latch Bit LT8 SET8 Reset Latch Bit LT8 RST8 Set Latch Bit LT9 SET9 Reset Latch Bit LT9 RST9 Set Latch Bit LT10 SET10 Reset Latch Bit LT10 RST10 Set Latch Bit LT11 SET11 Reset Latch Bit LT11 RST11 Set Latch Bit LT12 SET12 Reset Latch Bit LT12 RST12 Set Latch Bit...

Page 412: ...quence see Figure 3 46 67Q3TC Level 4 negative sequence see Figure 3 46 67Q4TC Torque Control Equations for Time Overcurrent Elements Note torque control equation settings cannot be set directly to logical 0 Phase element see Figure 3 47 51PTC Residual ground element see Figure 3 48 51GTC Negative sequence element see Figure 3 49 51QTC Torque Control Equations for Tapped Load Time Overcurrent Elem...

Page 413: ...le SV9 SV9 SELOGIC control equation Variable SV10 SV10 SELOGIC control equation Variable SV11 SV11 SELOGIC control equation Variable SV12 SV12 SELOGIC control equation Variable SV13 SV13 SELOGIC control equation Variable SV14 SV14 SELOGIC control equation Variable SV15 SV15 SELOGIC control equation Variable SV16 SV16 Output Contact Equations See Figure 7 26 Output Contact OUT101 OUT101 Output Cont...

Page 414: ... Point DP16 DP16 Setting Group Selection Equations See Table 7 4 Select Setting Group 1 SS1 Select Setting Group 2 SS2 Select Setting Group 3 SS3 Select Setting Group 4 SS4 Select Setting Group 5 SS5 Select Setting Group 6 SS6 Other Equations Event report trigger conditions see Section 12 ER Fault indication used in time target logic see Table 5 1 used also to suspend demand metering updating and ...

Page 415: ...TMB6A Channel A transmit bit 7 TMB7A Channel A transmit bit 8 TMB8A Channel B transmit bit 1 TMB1B Channel B transmit bit 2 TMB2B Channel B transmit bit 3 TMB3B Channel B transmit bit 4 TMB4B Channel B transmit bit 5 TMB5B Channel B transmit bit 6 TMB6B Channel B transmit bit 7 TMB7B Channel B transmit bit 8 TMB8B 87L Transmit Bit Equations Channel X transmit bit 1 T1X Channel X transmit bit 2 T2X...

Page 416: ...rate 1 60 seconds SCROLD ________ Event Report Parameters See Section 12 Length of event report 15 30 60 cycles LER Length of pre fault in event report 1 14 cycles in 1 cycle steps for LER 15 PRE 1 29 cycles in 1 cycle steps for LER 30 1 59 cycles in 1 cycle steps for LER 60 Station DC Battery Monitor See Figures 8 9 and 8 10 DC battery instantaneous undervoltage pickup OFF 20 300 Vdc DCLOP DC bat...

Page 417: ...e following settings if preceding enable setting EBMON Y Close Open set point 1 max 0 65000 operations COSP1 Close Open set point 2 mid 0 65000 operations COSP2 Close Open set point 3 min 0 65000 operations COSP3 kA Interrupted set point 1 min 0 00 999 00 kA primary in 0 01 kA steps KASP1 kA Interrupted set point 2 mid 0 00 999 00 kA primary in 0 01 kA steps KASP2 kA Interrupted set point 3 max 0 ...

Page 418: ...011112 Sequential Events Recorder settings are comprised of three trigger lists Each trigger list can include up to 24 Relay Word bits delimited by commas Enter NA to remove a list of these Relay Word bit settings See Sequential Events Recorder SER Report in Section 12 SER Trigger List 1 SER1 SER Trigger List 2 SER2 SER Trigger List 3 SER3 ...

Page 419: ...LB2 Local Bit LB3 Name 14 characters NLB3 Clear Local Bit LB3 Label 7 characters CLB3 Set Local Bit LB3 Label 7 characters SLB3 Pulse Local Bit LB3 Label 7 characters PLB3 Local Bit LB4 Name 14 characters NLB4 Clear Local Bit LB4 Label 7 characters CLB4 Set Local Bit LB4 Label 7 characters SLB4 Pulse Local Bit LB4 Label 7 characters PLB4 Local Bit LB5 Name 14 characters NLB5 Clear Local Bit LB5 La...

Page 420: ...me 14 characters NLB11 Clear Local Bit LB11 Label 7 characters CLB11 Set Local Bit LB11 Label 7 characters SLB11 Pulse Local Bit LB11 Label 7 characters PLB11 Local Bit LB12 Name 14 characters NLB12 Clear Local Bit LB12 Label 7 characters CLB12 Set Local Bit LB12 Label 7 characters SLB12 Pulse Local Bit LB12 Label 7 characters PLB12 Local Bit LB13 Name 14 characters NLB13 Clear Local Bit LB13 Labe...

Page 421: ...cters DP4_1 Display if DP4 logical 0 16 characters DP4_0 Display if DP5 logical 1 16 characters DP5_1 Display if DP5 logical 0 16 characters DP5_0 Display if DP6 logical 1 16 characters DP6_1 Display if DP6 logical 0 16 characters DP6_0 Display if DP7 logical 1 16 characters DP7_1 Display if DP7 logical 0 16 characters DP7_0 Display if DP8 logical 1 16 characters DP8_1 Display if DP8 logical 0 16 ...

Page 422: ...ogical 0 16 characters DP14_0 Display if DP15 logical 1 16 characters DP15_1 Display if DP15 logical 0 16 characters DP15_0 Display if DP16 logical 1 16 characters DP16_1 Display if DP16 logical 0 16 characters DP16_0 Reclosing Relay Labels See Functions Unique to the Front Panel Interface in Section 11 Reclosing Relay Last Shot Label 14 char 79LL Reclosing Relay Shot Counter Label 14 char 79SL ...

Page 423: ...Settings See Below Time out 0 30 minutes T_OUT DTA Meter Format Y N DTA Send Auto Messages to Port Y N AUTO Enable Hardware Handshaking Y N MBT Refer to Appendix I for details on setting MBT RTSCTS Fast Operate Enable Y N FASTOP Other Port Settings Set T_OUT to the number of minutes of serial port inactivity for an automatic log out Set T_OUT 0 for no port time out Set DTA Y to allow an SEL DTA or...

Page 424: ...e clock edge detect R Rising F Falling RC422X EIA 422 transmit clock edge detect R Rising F Falling TC422X If CHANX type is not EIA 422 Timing source I Internal E External TIMRX 87L Channel Y Configuration Settings Channel Y address check Y N EADDCY If EADDCY Y Channel Y transmit address 1 16 TA_Y Channel Y receive address 1 16 RA_Y Continuous dropout alarm 1 1000 seconds RBADYP Packets lost in la...

Page 425: ...mand 10 10 87L COMM Report 10 11 Serial Port Communications and Commands 10 12 Port Connector and Communications Cables 10 13 IRIG B 10 13 SEL 311L to Computer 10 14 SEL 311L to SEL 2020 SEL 2030 or SEL 2100 10 15 SEL 311L to SEL DTA2 10 15 SEL 311L to StarComm Modem 5 Vdc Powered 10 16 SEL 311L to Modem or Other DCE 10 16 Communications Protocols 10 17 Hardware Protocol 10 17 Software Protocols 1...

Page 426: ...ns Port Pin Terminal Function Definitions 10 17 Table 10 5 Serial Port Automatic Messages 10 20 Table 10 6 Serial Port Command Summary 10 24 Table 10 7 Event Types 10 32 Table 10 8 SEL 311L Relay Word and Its Correspondence to TAR Command 10 46 Table 10 9 SEL 311L Relay Control Subcommands 10 51 FIGURES Figure 10 1 Back to Back EIA 422 Connection With External Clock Source 10 3 Figure 10 2 Back to...

Page 427: ...hannel monitor indicators and monitor settings applicable to all interface types Use the SET X command to access the channel configuration settings and channel monitor settings for line current differential channel interface X Use the SET Y command for channel interface Y Alternatively use the front panel SET command see Figure 11 3 Channel Configuration Settings EIA 422 Interface The EIA 422 inte...

Page 428: ... A N A RC422 R TC422 R Nortel JMUX Nx64 Unit 86464 01 86447 90 Transmit INT Receive INT RC422 F TC422 R Unlike other interfaces available with the SEL 311L the EIA 422 interface can operate at either 64 kbps or 56 kbps The SEL 311L Relay automatically adapts to either data rate There is no data rate setting The transmit and receive clocks must be of identical frequency This requirement is satisfie...

Page 429: ...ion All of those cables connect the shield at the multiplexer end only The DB 25 connector pinout on the SEL 311L Relay and the direction of signal flow is shown in Figure 2 7 For relay to multiplexer connections use the SET X or SET Y commands to make setting TIMRX E TIMRY E for Channel Y No clock polarity selections are necessary because the synchronizing clock is embedded in the transmit and re...

Page 430: ...hown in Figure 2 8 Use the SET X or SET Y commands to make setting TIMRX E TIMRY E for Channel Y in both relays This configures the SEL 311L Relay to synchronize the transmit date rate to exactly match the receive data rate set by the multiplexer PC37 94 defines several troubleshooting aids including a Yellow Alarm bit At present the SEL 311L Relay does not report the status of the receive Yellow ...

Page 431: ...sion 0 4 dB per splice Fiber Loss 1300 nm 1 0 dB per km Budget SEL 311L 1300 nm Fiber Interface System Gain 40 0 dB Connector Loss 4 connectors 8 0 dB Splice Loss three splices 1 2 dB Available Gain 30 8 dB Maximum 62 5 µm Cable Length 30 8 dB 1 0 dB km 30 8 km Dual Channel Applications Order the SEL 311L Relay with combinations of up to two of the channel interfaces described above for use in hot...

Page 432: ...elay transmits and receives valid 87L packets from another SEL 311L Relay In addition several Relay Word bits per channel indicate channel health and help determine the cause of channel problems The collection of Relay Word bits LEDs and channel monitor reports collectively form the channel monitors This section describes each of the channel problem indicators and describes settings associated wit...

Page 433: ... a receiver To effectively detect inadvertent loopbacks set RA_X different than TA_X The second purpose is to avoid misoperations due to misrouted communications links To effectively detect misrouted communications links set RA_X and TA_X uniquely for each SEL 311L Relay connected to the network For direct fiber connections set RA_X and TA_X uniquely for each SEL 311L Relay with a fiber pair in a ...

Page 434: ... Y contain no errors They are an instantaneous unfiltered indication of channel health The relay uses ROKX and ROKY to produce the other Relay Word bits described above ROKX and ROKY can be useful for testing Relay Word Bit 87LPE 87LPE asserts when 87L protection is enabled The relay monitors the available channels and determines if enough information is available from each remote relay to perform...

Page 435: ...iplexed connection uses channel 5 in multiplexer A In each relay use the SET L command to make the following settings T1Y CHXAL T1X CHYAL DP1 R1Y DP2 CHXAL DP3 R1X DP4 CHYAL DP5 87LPE Using the SET T command make the following text settings DP1_1 MX A CH5 TX FAIL DP1_0 DP2_1 MX A CH5 RX FAIL DP2_0 DP3_1 A4B79 TX FAIL DP3_0 DP4_1 A4B79 RX FAIL DP4_0 DP5_1 DP5_0 87L DISABLED The SEL 311L Relay front...

Page 436: ...ls per the channel settings The TST command enables short term or long term internal or external loopback tests end to end tests or back to back tests To enter the TST command type TST X or TST Y for Channel X or Y respectively To end the test mode before the duration timer expires type TST X C or TST Y C After entering the TST command the relay warns that protection and tripping are still enabled...

Page 437: ...ore it reaches the communications equipment Select external timing if the channel is looped after it reaches the communications equipment Select the duration of the temporary test configuration from 1 to 30 minutes Enter a duration to prevent accidentally leaving the relay in test mode after the test After the duration timer expires the relay reconfigures itself per the Channel X and Channel Y set...

Page 438: ... 23 53 847 0 001 Dropout Error 9 05 26 01 09 23 53 843 05 26 01 09 23 53 846 0 003 Data Error 25 05 26 01 09 23 51 554 05 26 01 09 23 51 654 0 100 Dropout Error 26 05 26 01 09 23 51 550 05 26 01 09 23 51 554 0 003 Data Error 27 05 24 01 13 37 04 688 05 24 01 13 37 04 689 0 001 Data Error 28 05 24 01 13 37 00 003 05 24 01 13 37 04 688 4 685 Dropout Error 29 05 24 01 13 37 00 000 05 24 01 13 37 00 0...

Page 439: ...ode can be input into Serial Port 1 or Serial Port 2 on any of the SEL 311L Relay models This is easily handled by connecting Serial Port 2 of the SEL 311L Relay to an SEL 2020 with Cable C273A see cable diagrams that follow in this section Note that demodulated IRIG B time code can be input into the connector for Serial Port 1 If demodulated IRIG B time code is input into this connector it should...

Page 440: ...that connect the SEL 311L Relay to other devices SEL provides fiber optic transceivers and cable for communications links with improved safety noise immunity and distance as compared to copper links The equivalent fiber cables are listed following each copper cable description These and other cables are available from SEL Contact the factory for more information SEL 311L to Computer Cable C234A SE...

Page 441: ...CD 20 DTR SEL 311L to SEL 2020 SEL 2030 or SEL 2100 Cable C273A SEL 2020 2030 or SEL 2100 SEL 311L Relay 9 Pin Male 9 Pin Male D Subconnector D Subconnector RXD 2 3 TXD TXD 3 2 RXD IRIG 4 4 IRIG GND 5 5 GND IRIG 6 6 IRIG RTS 7 8 CTS CTS 8 7 RTS DTE Data Terminal Equipment Computer Terminal Printer etc DCE Data Communications Equipment Modem etc SEL 311L to SEL DTA2 Cable C272A SEL DTA2 SEL 311L Re...

Page 442: ...tarComm Modem SEL 311L Relay 25 Pin Male 9 Pin Male D Subconnector D Subconnector GND 7 5 GND TXD IN 2 3 TXD DTR IN 20 7 RTS RXD OUT 3 2 RXD CD OUT 8 8 CTS PWR IN 10 1 5 VDC GND 1 9 GND SEL 311L to Modem or Other DCE Cable C222 SEL 311L Relay DCE Device 9 Pin Male 25 Pin Male D Subconnector D Subconnector GND 5 7 GND TXD 3 2 TXD IN RTS 7 20 DTR IN RXD 2 3 RXD OUT CTS 8 8 CD OUT GND 9 1 GND ...

Page 443: ...ol All EIA 232 serial ports support RTS CTS hardware handshaking RTS CTS handshaking is not supported on the EIA 485 Serial Port 1 To enable hardware handshaking use the SET P command or front panel SET pushbutton to set RTSCTS Y Disable hardware handshaking by setting RTSCTS N If RTSCTS N the relay permanently asserts the RTS line If RTSCTS Y the relay deasserts RTS when it is unable to receive c...

Page 444: ...y be used without distinction except in passwords Note The ENTER key on most keyboards is configured to send the ASCII character 13 M for a carriage return This manual instructs you to press the ENTER key after commands which should send the proper ASCII code to the relay 2 The relay transmits all messages in the following format STX MESSAGE LINE 1 CRLF MESSAGE LINE 2 CRLF LAST MESSAGE LINE CRLF E...

Page 445: ... LMD The SEL Distributed Port Switch Protocol LMD permits multiple SEL relays to share a common communications channel The protocol is selected by setting the port setting PROTO LMD See Appendix C for more information on SEL Distributed Port Switch Protocol LMD SEL Fast Meter Protocol SEL Fast Meter protocol supports binary messages to transfer metering and control messages The protocol is describ...

Page 446: ...s on the SEL 311L Relay and open a connection 2 Press a carriage return ENTER and verify that a prompt is returned The indicates that you are in Access Level 0 If you do not get a with each carriage return then something is wrong with your connection Terminate your serial connection check your cable connections and your communications parameters and restart your serial I O connection 3 To change p...

Page 447: ...sswords include special characters upper and lower case letters and numbers They also form no recognizable names or words The following example demonstrates how to change your SEL 311L Relay passwords It assumes the existing passwords are BADPAS BRAKER and TOOEZY for Access Levels 1 B and 2 respectively It changes the passwords to Ot3579 Bkr351 and Ta2468 respectively Your default factory password...

Page 448: ...r in bold uppercase STATUS Computer keys you press appear in bold uppercase brackets ENTER Access Level 0 Once serial port communications are established with the relay the relay sends the following prompt This is referred to as Access Level 0 The only command that is available at Access Level 0 is the ACC command see Table 10 6 Enter the ACC command at the Access Level 0 prompt ACC ENTER The ACC ...

Page 449: ... Access Level 2 Enter the 2AC command at the Access Level B prompt 2AC ENTER Access Level 2 When the relay is in Access Level 2 the relay sends the prompt Commands CON through VER in Table 10 6 are available from Access Level 2 For example enter the SET command at the Access Level 2 prompt to make relay settings SET ENTER While the relay is in Access Level 2 any of the Access Level 1 Access Level ...

Page 450: ...and Summary Access Level Prompt Serial Port Command Command Description Corresponding Front Panel Pushbutton 0 ACC Go to Access Level 1 0 CAS Compressed ASCII configuration data 1 2AC Go to Access Level 2 1 BAC Go to Access Level B 1 BRE Breaker monitor data OTHER 1 CEV Compressed event report 1 CHIS Compressed history 1 COM MIRRORED BITS communications statistics 1 CST Compressed status report 1 ...

Page 451: ...f a command is entered from an access level lower than the specified access level for the command The relay responds Invalid Command to commands not listed above or entered incorrectly Many of the command responses display the following header at the beginning SEL 311L Date 10 12 99 Time 16 15 39 372 EXAMPLE BUS B BREAKER 3 The definitions are SEL 311L This is the RID setting the relay is shipped ...

Page 452: ...fault Passwords Passwords are required if the main board Password jumper is not in place Password jumper OFF Passwords are not required if the main board Password jumper is in place Password jumper ON Refer to Table 2 5 for Password jumper information See PAS Command later in this section for more information on passwords The factory default passwords for Access Levels 1 B and 2 are Access Level F...

Page 453: ...ccess Level 0 prompt enter the ACC command ACC ENTER Because the Password jumper is in place the relay does not ask for a password it goes directly to Access Level 1 The relay responds SEL 311L Date 10 12 99 Time 16 22 04 372 EXAMPLE BUS B BREAKER 3 Level 1 The prompt indicates the relay is now in Access Level 1 The above two examples demonstrate how to go from Access Level 0 to Access Level 1 The...

Page 454: ... 41 4 IC 53 8 kA Ext Trips 3 IA 0 8 IB 0 9 IC 1 1 kA Percent wear A 4 B 4 C 6 LAST RESET 10 12 99 15 32 59 See BRE n Command in Access Level B Commands that follows in this section and Breaker Monitor in Section 8 Breaker Monitor and Metering Functions for further details on the breaker monitor CEV Command Displays event report in compressed ASCII format For details on this and other Compressed AS...

Page 455: ... to 10 10 99 18 36 11 746 Total failures 1 Last error Relay Disabled 1 Data error 0 Longest Failure 2 458 sec Re Sync 0 Underrun 0 Unavailability 0 996200 Overrun 0 Parity error 0 Framing error 0 Loop back 0 Bad Re Sync 0 If only one MIRRORED BITS port is enabled the channel specifier may be omitted Use the L parameter to get a summary report followed by a listing of the COMM records COM A L ENTER...

Page 456: ...ing message Are you sure Y N is displayed Typing N ENTER aborts the clearing operation with the message Canceled If both MIRRORED BITS channels are enabled omitting the channel specifier in the clear command will cause both channels to be cleared CST Command Display status data in compressed ASCII format For details on this and other Compressed ASCII commands see Appendix E Compressed ASCII Comman...

Page 457: ...tile memory If no parameters are specified with the HIS command HIS ENTER the relay displays the most recent event summaries in reverse chronological order If x is the letter E HIS E ENTER the relay displays the most recent event summaries in reverse chronological order The leading number is a unique event identifier between 1 and 32767 that can be used with the SUM or CSU commands to view event s...

Page 458: ...lt locator runs successfully the location is listed in the LOCAT column and the event type is listed in the EVENT column Table 10 7 Event Types Event Type Faulted Phase AG A phase to ground BG B phase to ground CG C phase to ground AB A B phase to phase BC B C phase to phase CA C A phase to phase ABG A B phase to phase to ground BCG B C phase to phase to ground CAG C A phase to phase to ground ABC...

Page 459: ...S B BREAKER 3 If no IRIG B code is present at the serial port input or if the code cannot be read successfully the relay responds IRIG B DATA ERROR If an IRIG B signal is present the relay synchronizes its internal clock with IRIG B It is not necessary to issue the IRI command to synchronize the relay clock with IRIG B Use the IRI command to determine if the relay is properly reading the IRIG B si...

Page 460: ... I1 I MAG A Pri 2 173 4 378 29 665 35 285 29 427 7 551 I ANG DEG 68 10 7 60 12 20 13 40 132 10 115 90 Alpha Plane A B C ZERO SEQ NEG SEQ POS SEQ RADIUS 0 990 1 000 1 020 0 000 0 000 1 000 ANG DEG 179 60 179 40 175 80 0 00 0 00 178 90 MET B k Instantaneous Metering The MET B commands provide access to the local relay metering data Metered quantities include phase voltages and currents sequence comp...

Page 461: ...The angles range from 179 99 to 180 00 degrees To view instantaneous metering values enter the command MET B k ENTER where k is an optional parameter to specify the number of times 1 32767 to repeat the meter display If k is not specified the meter report is displayed once The output from an SEL 311L Relay is shown below MET B ENTER SEL 311L Date 10 12 99 Time 16 22 04 372 EXAMPLE BUS B BREAKER 3 ...

Page 462: ...IB IC IG 3I2 DEMAND 188 6 186 6 191 8 4 5 4 7 PEAK 188 6 186 6 191 8 4 5 4 7 MWA MWB MWC MW3P MVARA MVARB MVARC MVAR3P DEMAND IN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PEAK IN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DEMAND OUT 2 2 2 2 2 2 6 6 0 3 0 3 0 3 0 9 PEAK OUT 3 1 3 1 3 1 9 3 0 4 0 4 0 4 1 2 LAST DEMAND RESET 01 27 97 15 31 51 238 LAST PEAK RESET 01 27 97 15 31 56 239 Reset the accumulated demand values u...

Page 463: ...nputs kV primary Power MW3P MVAR3P Three phase megawatts Three phase megavars Reset Time Last time the maximum minimum meter was reset To view maximum minimum metering values enter the command MET M ENTER The output from an SEL 311L Relay is shown MET M ENTER SEL 311L Date 10 12 99 Time 16 22 04 372 EXAMPLE BUS B BREAKER 3 Max Date Time Min Date Time IA A 196 8 10 01 99 15 00 42 574 30 0 10 01 99 ...

Page 464: ...f it is established see Appendix C for details on SEL Distributed Port Switch Protocol LMD SER Command Sequential Events Recorder Report Use the SER command to view the Sequential Events Recorder report For more information on SER reports see Section 12 Standard Event Reports and SER SHO Command Show View Settings Use the SHO command to view relay settings SELOGIC control equations global settings...

Page 465: ... Group 1 Group Settings RID SEL 311L TID EXAMPLE BUS B BREAKER 3 CTR 200 APP 311L E87L 2 EHST 2 EHSDTT N EDD N ETAP N PCHAN X EHSC N CTR_X 200 87LPP 6 00 87L2P 0 50 87LGP OFF CTALRM 0 50 87LR 6 0 87LANG 195 CTRP 200 PTR 2000 00 PTRS 2000 00 Z1MAG 7 80 Z1ANG 84 00 Z0MAG 24 80 Z0ANG 81 50 LL 100 00 E21P 3 E21MG 3 E21XG 3 E50P 1 E50G N E50Q N E51P N E51G Y E51Q Y E32 AUTO EOOS N ELOAD Y ESOTF Y EVOLT...

Page 466: ...Logic group 1 SELogic Control Equations TR M1P Z1G M2PT Z2GT 51GT 51QT OC TRCOMM M2P Z2G TRSOTF M2P Z2G 50P1 DTT 0 ULTR 50L 51G PT1 IN102 52A IN101 CL CC ULCL TRIP TRIP87 67P1TC 1 51GTC 1 51QTC 1 OUT101 TRIP OUT102 TRIP OUT103 CLOSE OUT104 KEY OUT105 0 Press RETURN to continue OUT106 0 OUT107 87HWAL OUT201 TRIP TRIP87 OUT202 TRIP TRIP87 OUT203 0 OUT204 0 OUT205 0 OUT206 0 DP1 52A DP2 CHXAL DP3 CHY...

Page 467: ...HROT ABC DATE_F MDY FP_TO 15 00 SCROLD 5 LER 15 PRE 4 DCLOP OFF DCHIP OFF IN101D 0 00 IN102D 0 00 IN103D 0 00 IN104D 0 00 IN105D 0 00 IN106D 0 00 EBMON N SHO P ENTER Port F PROTO SEL SPEED 2400 BITS 8 PARITY N STOP 1 T_OUT 15 DTA N AUTO N RTSCTS N FASTOP N SHO R ENTER Sequential Events Recorder trigger lists SER1 87L 87L2 87LG 87LA 87LB 87LC R87L2 R87LG R87LA R87LB R87LC SER2 TRIP TRIP87 CLOSE LOP...

Page 468: ...LB10 NLB11 CLB11 SLB11 PLB11 NLB12 CLB12 SLB12 PLB12 NLB13 CLB13 SLB13 PLB13 NLB14 CLB14 SLB14 PLB14 NLB15 CLB15 SLB15 PLB15 NLB16 CLB16 SLB16 PLB16 DP1_1 BREAKER CLOSED DP1_0 BREAKER OPEN Press RETURN to continue DP2_1 CHANNEL X ALARM DP2_0 DP3_1 CHANNEL Y ALARM DP3_0 DP4_1 DP4_0 DP5_1 DP5_0 DP6_1 DP6_0 DP7_1 DP7_0 DP8_1 DP8_0 DP9_1 DP9_0 DP10_1 DP10_0 DP11_1 DP11_0 DP12_1 DP12_0 DP13_1 DP13_0 DP...

Page 469: ...REG 5V_REG 12V_PS 12V_PS 15V_PS 15V_PS PS 4 91 4 98 5 00 12 00 12 05 14 80 14 71 MB TEMP RAM ROM A D CR_RAM EEPROM 36 8 OK OK OK OK OK 87L RAM ROM CHAN X CHAN Y FPGA BOARD OK OK FAIL N A OK OK Relay Enabled Line Current Differential Protection Disabled STA Command Row and Column Definitions FID FID is the firmware identifier string It identifies the firmware revision CID CID is the firmware checks...

Page 470: ...n If backup protection is Disabled 87L protection is also disabled Line Current Differential Protection Disabled Enabled Indicates the status of 87L protection If 87L protection is disabled backup protection may still be enabled and functional W Warning or F Failure is appended to the values to indicate an out of tolerance condition The relay latches all self test warnings and failures in order to...

Page 471: ...e 10 8 All rows of the Relay Word are described in Section 9 Setting the Relay A Relay Word bit is either at a logical 1 asserted or a logical 0 deasserted Relay Word bits are used in SELOGIC control equations See Section 9 Setting the Relay and Appendix G Setting SELOGIC Control Equations The TAR command does not remap the front panel target LEDs as is done in some previous SEL relays But executi...

Page 472: ...0 1 0 0 1 0 0 79RS 79CY 79LO SH0 SH1 SH2 SH3 SH4 0 0 1 0 0 1 0 0 0 0 1 0 0 1 0 0 Note that Relay Word row containing the SH1 bit is repeated 10 times In this example the reclosing relay is in the Lockout State 79LO logical 1 and the shot is at shot 2 SH2 logical 1 Command TAR 31 will report the same data since the SH1 bit is in Row 31 of the Relay Word TIM Command View Change Time TIM displays the...

Page 473: ...XXXXX XXXXX XXXXX XXXXX 1028 1019 1012 14 ANG DEG 160 9 79 0 40 7 168 2 XXX X XXX X XXX X XXX X 19 5 100 8 139 5 74 2 Fault MAG A 1028 1028 1031 4 XXXXX XXXXX XXXXX XXXXX 1029 1016 1014 10 ANG DEG 161 2 78 8 41 0 125 8 XXX X XXX X XXX X XXX X 18 9 101 1 139 1 74 2 87L Channel Status N 4 1 RNX TNX RNY TNY TRIG Channel X Channel Y OK 0000 0000 0000 0000 Local PreFault IA IB IC IP IG 3I2 VA VB VC MAG...

Page 474: ...A Ext Trips 0 IA 0 0 IB 0 0 IC 0 0 kA Percent wear A 25 B 28 C 24 Use the BRE R command to reset the breaker monitor BRE R ENTER Reset Trip Counters and Accumulated Currents Wear Are you sure Y N Y ENTER SEL 311L Date 10 13 99 Time 10 12 45 627 EXAMPLE BUS B BREAKER 3 Rly Trips 0 IA 0 0 IB 0 0 IC 0 0 kA Ext Trips 0 IA 0 0 IB 0 0 IC 0 0 kA Percent wear A 0 B 0 C 0 LAST RESET 02 03 99 05 41 07 See B...

Page 475: ...ute the CLO command and responds Aborted No Breaker Jumper GRO n Command Change Active Setting Group The GRO command displays the active settings group The GRO n command changes the active setting group to setting Group n To change to settings Group 2 enter the following GRO 2 Change to Group 2 Are you sure Y N Y ENTER Changing Active Group 2 The relay switches to Group 2 and pulses the ALARM cont...

Page 476: ...ssert the TRIP Relay Word bit which in turn asserts an output contact e g OUT101 TRIP to trip a circuit breaker See Figure 5 4 See the discussion following Figure 5 4 for more information concerning Relay Word bit OC and its recommended use as used in the factory settings To issue the OPE command enter the following OPE ENTER Open Breaker Y N Y ENTER Are you sure Y N Y ENTER Typing N ENTER after e...

Page 477: ...Control Remote Bit The CON command is a two step command that allows you to control Relay Word bits RB1 through RB16 At the Access Level 2 prompt type CON a space and the number of the remote bit you wish to control 1 16 The relay responds by repeating your command followed by a colon At the colon type the Control subcommand you wish to perform see Table 10 9 The following example shows the steps ...

Page 478: ...e transmitter of the communications channel physically looped back to the receiver the MIRRORED BITS addressing will be wrong and ROK will be de asserted The LOO command tells the MIRRORED BITS software to temporarily expect to see its own data looped back as its input In this mode LBOK will assert if error free data is received The LOO command with just the channel specifier enables looped back m...

Page 479: ...ing The TST command is used for configuring the differential channels for testing By itself the TST command will give normal or test mode status of the differential channels as shown below TST ENTER Channel X Test Mode Channel Y Test Mode When followed by the channel designation TST X or TST Y a dialog will begin to put the channel into a loopback back to back or end to end test as shown below Not...

Page 480: ......

Page 481: ...sent R specifies raw unfiltered data defaults to 16 samples per cycle unless overridden by the Sx parameter Defaults to 16 cycles in length unless overridden with the Ly parameter C specifies 16 samples per cycle 15 cycle length CHIS Compressed history COM p L Show a long format communications summary report for all events on MIRRORED BITS or Differential Channel p COM p n Show a communications su...

Page 482: ...p n SHO L n Show SELOGIC control equation settings for Group n SHO G Show global settings SHO P n Show Port n settings SHO R Show Sequential Events Recorder SER settings SHO T Show text label settings STA Show relay self test status SUM Show newest event summary SUM A Acknowledge oldest even summary SUM N View oldest unacknowledged event report SUM N A Display or acknowledge event summary number N...

Page 483: ...back PAS Show existing Access Level 1 B and 2 passwords PAS 1 xxxxxx Change Access Level 1 password to xxxxxx PAS B xxxxxx Change Access Level B password to xxxxxx PAS 2 xxxxxx Change Access Level 2 password to xxxxxx SET n Change relay settings overcurrent reclosing timers etc for Group n SET L n Change SELOGIC control equation settings for Group n SET G Change global settings SET P n Change Port...

Page 484: ......

Page 485: ...ay Deenergized 11 10 Rotating Default Display 11 11 Scroll Lock Control of Front Panel LCD 11 14 Stop Scrolling Lock 11 14 Restart Scrolling Unlock 11 14 Single Step 11 14 Exit 11 15 Cancel 11 15 Additional Rotating Default Display Example 11 15 FIGURES Figure 11 1 SEL 311L Relay Front Panel Pushbuttons Overview 11 1 Figure 11 2 SEL 311L Relay Front Panel Pushbuttons Primary Functions 11 2 Figure ...

Page 486: ......

Page 487: ...en the present selected function e g metering is exited press EXIT pushbutton or the display goes back to the default display after no front panel activity for a settable time period see global setting FP_TO in the Settings Sheets at the end of Section 9 Setting the Relay the relay is shipped with FP_TO 15 minutes Figure 11 1 SEL 311L Relay Front Panel Pushbuttons Overview Primary Functions Note i...

Page 488: ...o the comments at the bottom of Figure 11 3 concerning Access Level B and Access Level 2 passwords See PAS Command View Change Password in Section 10 for the list of default passwords and for more information on changing passwords To enter the Access Level B and Access Level 2 passwords from the front panel if required use the left right arrow pushbuttons to underscore a password digit position Th...

Page 489: ... Functions Continued Secondary Functions After a primary function is selected see Figure 11 2 and Figure 11 3 the pushbuttons then revert to operating on their secondary functions see Figure 11 4 When changing settings use the left right arrows to underscore a desired function Then press the SELECT pushbutton to select the function ...

Page 490: ...ng changes are complete press the SELECT pushbutton to select enable the setting Press the CANCEL pushbutton to abort a setting change procedure and return to the previous display Press the EXIT pushbutton to return to the default display and have the primary pushbutton functions activated again see Figure 11 2 and Figure 11 3 Figure 11 4 SEL 311L Relay Front Panel Pushbuttons Secondary Functions ...

Page 491: ...0463 4 3 04 06 5 If reclosing functions are disabled see Reclosing Relay in Section 6 Close and Reclose Logic the following screen appears P 3FDMPTJOH TFU The corresponding text label settings shown with example settings are 79LL SET RECLOSURES Last Shot Label limited to 14 characters 79SL RECLOSE COUNT Shot Counter Label limited to 14 characters If 79LL nor 79SL are set upon selecting function 79...

Page 492: ...d the reclosing relay goes to the reclose cycle state The reclosing relay shot counter screen still appears as 4 5 3 0463 4 3 04 06 5 The first open interval 79OI1 30 times out the shot counter increments from 0 to 1 and the relay recloses the breaker The reclosing relay shot counter screen shows the incremented shot counter 4 5 3 0463 4 3 04 06 5 The relay trips the breaker open again The reclosi...

Page 493: ...ol Use local control to enable disable schemes trip close breakers etc via the front panel In more specific terms local control asserts sets to logical 1 or deasserts sets to logical 0 what are called local bits LB1 through LB16 These local bits are available as Relay Word bits and are used in SELOGIC control equations see Tables 9 3 and 9 4 Local control can emulate the switch types shown in Figu...

Page 494: ...tches in Section 7 Inputs Outputs Timers and Other Control Logic for more information on local control View Local Control with Example Settings Access local control via the CNTRL pushbutton If local control switches exist i e corresponding switch position label settings were made the following message displays with the rotating default display messages 1SFTT 53 GPS PDBM POUSPM Assume the following...

Page 495: ...UQVU POUBDU km 5FTUJOH This front panel function provides the same function as the serial port PUL command see Figure 11 3 Operate Local Control with Example Settings Press the right arrow pushbutton and scroll back to the first set local control switch in the example settings 6 53 1 km 1PTJUJPO 3 563 Press the SELECT pushbutton and the operate option for the displayed local control switch display...

Page 496: ...ls on how local bit outputs LB3 and LB4 are set in SELOGIC control equation settings to respectively trip and close a circuit breaker Local Control State Retained When Relay Deenergized Local bit states are stored in nonvolatile memory so when power to the relay is turned off the local bit states are retained For example suppose the local control switch with local bit output LB1 is configured as a...

Page 497: ... Press CNTRL for Local Control message displays in rotation display time SCROLD with the default metering screen if at least one local control switch is operational It is a reminder of how to access the local control function See the preceding discussion in this section and Local Control Switches in Section 7 Inputs Outputs Timers and Other Control Logic for more information on local control 0 If ...

Page 498: ... screen The display point example settings are DP2 CHXAL alarm condition on Channel X DP3 CHYAL alarm condition on Channel Y Display Points 2 and 3 are used to help diagnostics when the 87CH FAIL LED illuminates Display Points SELOGIC Control Equation Settings Example Display Point States Display Point Label Settings DP2 CHXAL DP3 CHYAL logical 0 logical 0 DP2_1 CHANNEL X ALARM DP2_0 NA DP3_1 CHAN...

Page 499: ... ALARM DP3_0 NA 0 In the preceding example only two display points DP2 and DP3 and their corresponding display point labels are set If additional display points and corresponding display point labels are set the additional enabled display point labels join the rotation display time SCROLD on the front panel display The SCROLD setting is made with the SET G command and reviewed with the SHO G comma...

Page 500: ...ppear every 8 seconds for 1 second as a reminder that the display is in Scroll Lock Control mode 4DSPMM MPDL 0 4 5 UP PDL Stop Scrolling Lock When in the Scroll Lock Control mode press the SELECT key to stop display rotation Scrolling can be stopped on any of the display point screens or on the current meter display screen While rotation is stopped the active display is updated continuously so tha...

Page 501: ...ol and return the rotating display to normal operation Cancel Press the CANCEL key to return to the OTHER menu 5 5 5 3 3 0 Additional Rotating Default Display Example See Figure 5 19 and accompanying text in Section 5 Trip and Target Logic for an example of resetting a rotating default display with the TARGET RESET pushbutton ...

Page 502: ......

Page 503: ...SER Trigger Settings 12 43 Retrieving SER Reports 12 44 Clearing SER Report 12 45 Example Sequential Events Recorder SER Report 12 45 TABLES Table 12 1 Event Types 12 5 Table 12 2 Standard Event Report Current Voltage and Frequency Columns Backup Protection 12 10 Table 12 3 Output Input Protection and Control Element Event Report Columns Backup Protection 12 11 Table 12 4 Communication Elements Ev...

Page 504: ...nual Figure 12 6 Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform 12 41 Figure 12 7 Derivation of Phasor RMS Current Values From Event Report Current Values 12 42 Figure 12 8 Example Sequential Events Recorder SER Event Report 12 46 ...

Page 505: ... 12 5 for an example standard 15 cycle differential event report The relay adds lines in the sequential events recorder SER report for a change of state of a programmable condition The SER lists date and time stamped lines of information each time a programmed condition changes state The relay stores the latest 512 lines of the SER report in nonvolatile memory If the report fills up newer rows ove...

Page 506: ...ation setting ER Relay Word bits TRIP is usually assigned to an output contact for tripping a circuit breaker e g SELOGIC control equation setting OUT201 TRIP TRIP87 also asserts Relay Word bit TRIP when high speed tripping is enabled EHST r 1 Programmable SELOGIC Control Equation Setting ER The programmable SELOGIC control equation event report trigger setting ER is set to trigger standard event ...

Page 507: ...ing SELOGIC Control Equations for more information on falling edge operators TRI Trigger Event Report and PUL Pulse Output Contact Commands The sole function of the TRI serial port command is to generate standard event reports primarily for testing purposes The PUL command asserts the output contacts for testing purposes or for remote control If output contacts OUT101 OUT107 or OUT201 OUT206 asser...

Page 508: ... other information follows as channel row data and summary data at the end See Figure 12 4 Figure 12 1 corresponds to the full length standard 15 cycle event reports in Figure 12 4 and Figure 12 5 Note Figure 12 4 and Figure 12 5 are on multiple pages 46 5 3 4 BUF 5JNF 9 1 64 3 3 WFOU 5 PDBUJPO 5SJQ 5JNF 4IPU SFR SPVQ MPTF 5JNF 5BSHFUT 0 SFBLFS 0QFO PDBM IBOOFM 9 IBOOFM 1SF BVMU 99999 99999 99999 ...

Page 509: ...ol equation setting ER Phase involvement is indeterminate TRIG Execution of TRIGGER command PULSE Execution of PULSE command Fault Location The relay reports the fault location if the EFLOC setting Y and the fault locator operates successfully after an event report is generated If the fault locator does not operate successfully or if EFLOC N is listed in the field Fault location is based upon the ...

Page 510: ... is sampled one and one quarter cycles after the event report is triggered Retrieving Full Length Standard Event Reports The latest event reports for both backup and line current differential protection are stored in nonvolatile memory Each event report includes five sections v Analog information such as current voltage station battery and V1Mem v Protection and control elements contact outputs an...

Page 511: ...ay backup protection event report If switch B is not present the line current differential event report will be displayed Below are example EVE commands Serial Port Command Description EVE Display the most recent event report at 1 4 cycle resolution EVE 2 Display the second event report at 1 4 cycle resolution EVE S16 L10 Display 10 cycles of the most recent report at 1 16 cycle resolution EVE C 2...

Page 512: ...ake advantage of the compressed ASCII format Use the EVE C command or CEV command to capture compressed ASCII event reports The compressed ASCII event report contains both the backup and differential event report information Figure 12 2 and Figure 12 3 show screen captures of the Alpha plane plots for internal and external faults using the SEL 5601 Analytical Assistant software See the CEVENT comm...

Page 513: ... filters the measurands to remove transient signals The relay operates on the filtered values and reports them in the event report To view the raw inputs to the relay select the unfiltered event report e g EVE R or EVE B R Use the unfiltered event reports to observe v Power system harmonics on the voltage and current channels v Decaying dc offset during fault conditions on current channels v Optoi...

Page 514: ...ple pages This example event report displays rows of information each 1 4 cycle and was retrieved with the EVE B command The columns contain ac current ac voltage station dc battery voltage and directional polarizing voltage V1Mem Current Voltage and Frequency Columns in the Backup Protection Event Report Table 12 2 summarizes the backup event report current voltage and frequency columns Table 12 ...

Page 515: ...on 9 Setting the Relay for more information on the Relay Word bits shown in Table 12 3 Table 12 4 and Table 12 6 Table 12 3 Output Input Protection and Control Element Event Report Columns Backup Protection Column Heading Corresponding Elements Relay Word Bits Symbol Definition All columns Element input output not picked up or not asserted unless otherwise stated ZAB1 MAB1 MAB2 MAB3 MAB4 1 2 3 4 I...

Page 516: ...t MABC1 set If Zone 2 3 phase distance element MABC2 set not Z3P1 If Zone 3 3 phase distance element MABC3 set not Z3P1 or Z3P2 If Zone 4 3 phase distance element MABC4 set not Z3P1 Z3P2 or Z3P3 ZCA1 MCA1 MCA2 MCA3 MCA4 1 2 3 4 If Zone 1 CA phase phase distance element MCA1 set If Zone 2 CA phase phase distance element MCA2 set not ZCA1 If Zone 3 CA phase phase distance element MCA3 set not ZCA1 o...

Page 517: ... 2 CG element XCG2 or MCG2 set not ZCG1 If Zone 3 CG element XCG3 or MCG3 set not ZCG1 or ZCG2 If Zone 4 CG element XCG4 or MCG4 set not ZCG1 or ZCG2 or ZCG3 OOS OSB OST t B T OOS timing OOS Block OSB OST OOS Trip OST VPOL VPOLV V VPOLV asserted 51 P 51P 51PT 51PR p Time overcurrent element picked up and timing 51 G 51G 51GT 51GR T Time overcurrent element timed out 51 Q 51Q 51QT 51QR r Time overc...

Page 518: ...Q Forward negative sequence directional element F32Q picked up R32Q q Reverse negative sequence directional element R32Q picked up 32 QVI F32QG Q Forward negative sequence ground directional element F32Q picked up R32QG q Reverse negative sequence ground directional element R32Q picked up F32V V Forward zero sequence ground directional element F32V picked up R32V v Reverse zero sequence ground dir...

Page 519: ...7Q4 3 4 b 67Q3 asserted 67Q4 asserted both 67Q3 and 67Q4 asserted DM P Q PDEM QDEM P Phase demand ammeter element PDEM picked up Q Negative sequence demand ammeter element QDEM picked up b Both PDEM and QDEM picked up DM G GDEM Residual ground demand ammeter element GDEM picked up 27 P 27A 27B 27C A A phase instantaneous undervoltage element 27A picked up B B phase instantaneous undervoltage eleme...

Page 520: ...VS instantaneous undervoltage element 27S picked up 59 P 59A 59B 59C A A phase instantaneous overvoltage element 59A picked up B B phase instantaneous overvoltage element 59B picked up C C phase instantaneous overvoltage element 59C picked up a 59A and 59B elements picked up b 59B and 59C elements picked up c 59C and 59A elements picked up 3 59A 59B and 59C elements picked up 59 PP 59AB 59BC 59CA ...

Page 521: ...ndow element 59VP picked up used in synchronism check S Channel VS voltage window element 59VS picked up used in synchronism check b Both 59VP and 59VS picked up 25 SF SF Slip frequency element SF picked up used in synchronism check 25 A 25A1 25A2 1 First synchronism check element 25A1 picked up 2 Second synchronism check element 25A2 picked up b Both 25A1 and 25A2 picked up 27B 27B81 Undervoltage...

Page 522: ...only 1 4 cycle R Reclosing relay in Reset State 79RS C Reclosing relay in Reclose Cycle State 79CY L Reclosing relay in Lockout State 79LO Time OPTMN RSTMN o Recloser open interval timer is timing r Recloser reset interval timer is timing Shot SH0 SH1 SH2 Reclosing relay nonexistent SH3 SH4 0 shot 0 SH0 1 shot 1 SH1 2 shot 2 SH2 3 shot 3 SH3 4 shot 4 SH4 Zld ZLIN ZLOUT i Load encroachment load in ...

Page 523: ...01 and OUT202 asserted Out2 3 4 OUT203 OUT204 3 4 b Output contact OUT203 asserted Output contact OUT204 asserted Both OUT203 and OUT204 asserted Out2 5 6 OUT205 OUT206 5 6 b Output contact OUT205 asserted Output contact OUT206 asserted Both OUT205 and OUT206 asserted In1 1 2 IN101 IN102 1 2 b Optoisolated input IN101 asserted Optoisolated input IN102 asserted Both IN101 and IN102 asserted In1 3 4...

Page 524: ... logic PTRX2 asserted b Both PTRX1 and PTRX2 asserted Z3RB Z3RB Zone Level 3 reverse block Z3RB asserted KEY KEY Key permissive trip signal KEY asserted EKEY EKEY Echo key EKEY asserted ECTT ECTT Echo conversion to trip condition ECTT asserted WFC WFC Weak infeed condition WFC asserted UBB UBB1 UBB2 1 Unblocking block 1 from DCUB logic UBB1 asserted 2 Unblocking block 2 from DCUB logic UBB2 assert...

Page 525: ...d TMB6A asserted TMB A 7 8 TMB7A TMB8A 7 MIRRORED BITS channel A transmit bit 7 TMB7A asserted 8 MIRRORED BITS channel A transmit bit 8 TMB8A asserted b Both TMB7A and TMB8A asserted RMB A 1 2 RMB1A RMB2A 1 MIRRORED BITS channel A receive bit 1 RMB1A asserted 2 MIRRORED BITS channel A receive bit 2 RMB2A asserted b Both RMB1A and RMB2A asserted RMB A 3 4 RMB3A RMB4A 3 MIRRORED BITS channel A recei...

Page 526: ...and TMB6B asserted TMB B 7 8 TMB7B TMB8B 7 MIRRORED BITS channel B transmit bit 7 TMB7B asserted 8 MIRRORED BITS channel B transmit bit 8 TMB8B asserted b Both TMB7B and TMB8B asserted RMB B 1 2 RMB1B RMB2B 1 MIRRORED BITS channel B receive bit 1 RMB1B asserted 2 MIRRORED BITS channel B receive bit 2 RMB2B asserted b Both RMB1B and RMB2B asserted RMB B 3 4 RMB3B RMB4B 3 MIRRORED BITS channel B rec...

Page 527: ...RED BITS channel B unavailability CBADB asserted b Both CBADA and CBADB asserted LBOK LBOKA LBOKB A MIRRORED BITS channel A loop back OK LBOKA asserted B MIRRORED BITS channel A loop back OK LBOKB asserted b Both LBOKA and LBOKB asserted OC OC CC o OPE Open command executed c CLO Close command executed Lcl RW 5 LB1 LB8 00 FF Hex Hex value of Relay Word 5 LB1 LB8 Local Bits Lcl RW 6 LB9 LB16 00 FF ...

Page 528: ... follows LB1 LB2 LB3 LB4 LB5 LB6 LB7 LB8 1 0 0 0 1 0 1 0 8A Hex EXAMPLE STANDARD 15 CYCLE EVENT REPORT BACKUP PROTECTION The following example standard 15 cycle event report in Figure 12 4 also corresponds to the example sequential events recorder SER report in Figure 12 8 The boxed numbers in Figure 12 4 correspond to the SER row numbers in Figure 12 8 The row explanations follow Figure 12 8 In F...

Page 529: ...Date Code 20010625 Standard Event Reports and SER 12 25 SEL 311L Instruction Manual 7 5 3 4 BUF 5JNF 9 1 64 3 3 4 3 7 VSSFOUT NQT 1SJ 7PMUBHFT L7 1SJ 7 1 7 7 7 74 FN 3 2 7ED ...

Page 530: ...l 1SPUFDUJPO BOE POUBDU 0 MFNFOUT 7 N 54 0 1 1 2 2 1 2 7 JI 7 0VU 0VU O 0 0 7 1 1 1 4 NP M0E 4 1 2 2 2 1141142 7 FU E1D 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 P 7 Q P 7 QQ 7 QQ 22 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 13 16 ...

Page 531: ... QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 QQ 22 C C 7 SQ 22 C C 7 SS 22 C C 7 SS C C 7 SS C C 7 SS C C 7 S C C 7 S C C 7 S C C 7 S C C 7 S C C 7 S C C 7 S C 7 S C 7 S 7 S 7 S 7 S 7 S PNNVOJDBUJPO MFNFOUT POUSPM MFNFOUT 4 1 4 5 3 5 3 33 DM 3FN UDI 4 PHJD 0 5 86 445 0 15 133 5 95505 0 0 38 38 38 38 38 38 0 59 5 53319 ...

Page 532: ...12 28 Standard Event Reports and SER Date Code 20010625 SEL 311L Instruction Manual 4 ...

Page 533: ...4 3 3 53 11 45 4 55 5 1 1 9 4 53 9 11 1 1 0 5 3 3 531 153 1534 1 9 1 2 1 2 650 004 0 405 70 5 0 01 0 1055 95 75 47 5 1 5 74 1 1 1 11 9 9 9 3 3 3 L L 1 0 1 1 0 0 0 0 0 0 1 1 1 1 6 5 34 21 2 6 25 234 3 1 1 3 3 3 3 3 03 3 27 0 0 405 3 5 16 63 8 5 1 1 0 1 0 2 1 0 5 63 10 010 1 4 PHJD HSPVQ 4 PHJD POUSPM RVBUJPOT 53 1 15 5 5 25 0 53 0 1 53405 1 1 55 6 53 15 6 53 1 53 1 1 5 ...

Page 534: ... 1 065 04 065 065 065 065 8 065 53 1 53 1 065 53 1 53 1 065 065 065 065 1 1 9 1 44 44 44 44 44 44 3 12 12 12 12 1 2 1 01 6 5 2 1 4 0 7 5 9 5 9 5 9 5 9 5 5 5 5 MPCBM 4FUUJOHT 5 3 3 2 1 305 5 1 50 4 30 3 13 01 0 1 0 0 Figure 12 4 Example Standard 15 Cycle Event Report 1 4 Cycle Resolution Backup Protection ...

Page 535: ...t Channel Y IC IC current received at Channel Y Total IA Sum of all Phase A terminal currents IB Sum of all Phase B terminal currents IC Sum of all Phase C terminal currents FREQ Frequency measured by the relay Table 12 6 Output Input and Protection and Control Element Event Report Columns Line Current Differential Column Heading Corresponding Elements Relay Word Bits Symbol Definition 87LA 87LA 8...

Page 536: ...eset p Tap load time overcurrent ground element picked up and timing T Tap load time overcurrent ground element timed out l Tap load time overcurrent ground element timing to reset after having timed out not electromechanical reset T50G T50G T50GT T50GR Tap load inst def time overcurrent ground element picked up T Tap load inst def time overcurrent ground trip element asserted T51Q T51Q T51QR T51Q...

Page 537: ...al channel receive bit R2X and R2Y asserted X Differential channel receive bit R2X asserted Y Differential channel receive bit R2Y asserted R3 R3X R3Y b Differential channel receive bit R3X and R3Y asserted X Differential channel receive bit R3X asserted Y Differential channel receive bit R3Y asserted R4 R4X R4Y b Differential channel receive bit R4X and R4Y asserted X Differential channel receive...

Page 538: ...RDTX and RDTY asserted X Differential channel direct trip bit RDTX asserted Y Differential channel direct trip bit RDTY asserted TDT TDTX TDTY b Differential channel direct trip bit TDTX and TDTY asserted X Differential channel direct trip bit TDTX asserted Y Differential channel direct trip bit TDTY asserted DD DD DD asserted ROK ROKX ROKY b Both Channels X and Y are receiving valid data X Channe...

Page 539: ...UT202 asserted b Both OUT201 and OUT202 asserted Out2 3 4 OUT203 OUT204 1 OUT203 asserted 2 OUT204 asserted b Both OUT203 and OUT204 asserted Out2 5 6 OUT205 OUT206 1 OUT205 asserted 2 OUT206 asserted b Both OUT205 and OUT206 asserted In1 1 2 IN101 IN102 1 IN101 asserted 2 IN102 asserted b Both IN101 and IN102 asserted In1 3 4 IN103 IN104 1 IN103 asserted 2 IN104 asserted b Both IN103 and IN104 as...

Page 540: ... example standard 15 cycle event report in Figure 12 5 also corresponds to the example sequential events recorder SER report in Figure 12 8 The boxed numbers in Figure 12 5 correspond to the SER row numbers in Figure 12 8 The row explanations follow Figure 12 8 7 5 3 4 BUF 5JNF 9 1 64 3 3 4 3 7 5FSNJOBM VSSFOUT NQT 1SJ PDBM IBOOFM 9 5PUBM Figures 12 6 and 12 7 ...

Page 541: ...ndard Event Reports and SER 12 37 SEL 311L Instruction Manual 1SPUFDUJPO BOE POUBDU 0 MFNFOUT 5 5 5 3TUS 54 3 5 35 3 0VU 0VU O 0 11 22 55 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 C 9 C C C 9 C C 9C 9 C C 21 15 14 23 17 18 20 19 22 ...

Page 542: ...C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9C 9 C C 9 9 C C 9 C C 9 C C 9 C 9 C 9 9 9 9 9 WFOU 5 PDBUJPO 4IPU SFRVFODZ 5BSHFUT 0 VSSFOUT 1SJ 1 2 SPVQ SPVQ 4FUUJOHT 3 4 5 9 1 64 3 3 53 11 45 4 55 5 1 1 9 4 53 9 11 1 1 0 5 3 10 9 4 3 10 5 1 2 ...

Page 543: ...47 5 1 5 74 1 1 1 11 9 9 9 3 3 3 L L 1 0 1 1 0 0 0 0 0 0 1 1 1 1 6 5 34 21 2 6 25 234 3 1 1 3 3 3 3 3 03 3 27 0 0 405 3 5 16 63 8 5 1 1 0 1 0 2 1 0 5 63 10 010 1 4 PHJD HSPVQ 4 PHJD POUSPM RVBUJPOT 53 1 15 5 5 25 0 53 0 1 53405 1 1 55 6 53 15 6 53 1 53 1 1 5 5 25 065 53 1 065 53 1 065 04 065 065 065 065 8 065 53 1 53 1 065 53 1 53 1 065 065 065 065 ...

Page 544: ...12 5 Figure 12 6 shows how the event report ac current column data relates to the actual filtered waveform and RMS values Figure 12 7 shows how the event report current column data can be converted to phasor RMS values Voltages are processed similarly Refer to cycle 6 of the analog section of Figure 12 4 and Figure 12 5 Notice that the currents decrease to about zero at row 1 of cycle 6 in the bac...

Page 545: ...uction Manual Figure 12 6 Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform In Figure 12 6 note that any two rows of current data from the event report in Figure 12 5 1 4 cycle apart can be used to calculate RMS current values ...

Page 546: ...ion of Phasor RMS Current Values From Event Report Current Values In Figure 12 7 note that two rows of current data from the event report in Figure 12 5 1 4 cycle apart can be used to calculate phasor RMS current values In Figure 12 7 at the present sample the phasor RMS current value is IBT 3102 A 27 8o ...

Page 547: ...lement changes state the relay time tags the changes in the SER For example setting SER3 contains distance and time overcurrent element pickups Thus any time one of these elements picks up or drops out the relay time tags the change in the SER The relay adds a message to the SER to indicate power up or settings change to active setting group conditions Relay newly powered up or Relay settings chan...

Page 548: ...dest row row 33 at the beginning top of the report and the latest row row 10 at the end bottom of the report Chronological progression through the report is down the page and in descending row number SER 47 22 If SER is entered with two numbers following it 47 and 22 in this example 47 22 all the rows between and including rows 47 and 22 are displayed if they exist They display with the newest row...

Page 549: ...gh the report is down the page and in ascending row number The date entries in the above example SER commands are dependent on the Date Format setting DATE_F If setting DATE_F MDY then the dates are entered as in the above examples Month Day Year If setting DATE_F YMD then the dates are entered Year Month Day If the requested SER event report rows do not exist the relay responds No SER Data Cleari...

Page 550: ... The differential elements are processed 16 times per power system cycle This means they are also time stamped and written to the SER buffer every millisecond However the backup protection elements are only processed four times per power system cycle They are then written to the SER buffer at the end of the quarter cycle processing interval This is the most accurate way to show the relative time s...

Page 551: ... 10 3 Protection elements deassert as the breaker opens and fault is interrupted 2 1 TRIP and TRIP87 deassert At first glance SER records 1 and 2 do not appear to correspond to the event report Figure 12 5 with OUT101 TRIP and OUT201 TRIP TRIP87 In Figure 12 5 OUT201 deasserts 1 2 cycle after OUT101 This is because the dedicated line current differential hardware controls outputs OUT201 OUT206 The...

Page 552: ......

Page 553: ...L Relay 87L Element Test Procedure 13 7 Relay Self Tests 13 13 Relay Troubleshooting 13 16 Inspection Procedure 13 16 Troubleshooting Procedure 13 16 Relay Calibration 13 19 Factory Assistance 13 19 TABLES Table 13 1 Phase Restraint Element Pickup Test Results Inner Radius 13 10 Table 13 2 Phase Restraint Element Dropout Test Results Outer Radius 13 10 Table 13 3 Negative Sequence Restraint Elemen...

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Page 555: ... on the utility system Goals a Ensure that the relay meets published critical performance specifications such as operating speed and element accuracy b Ensure that the relay meets the requirements of the intended application c Gain familiarity with relay settings and capabilities What to test All protection elements and logic functions critical to the intended application SEL performs detailed acc...

Page 556: ...nctions that lower the utility dependence on routine maintenance testing Use the SEL relay reporting functions as maintenance tools Periodically verify that the relay is making correct and accurate current and voltage measurements by comparing the relay METER output to other meter readings on that line Review relay event reports in detail after each fault Using the event report current voltage and...

Page 557: ...eceived current is the same as the local current This condition may be interpreted by the relay as an internal fault so care should be taken to disable trip outputs EVENT Command The relay generates a 15 30 or 60 cycle event report in response to faults or disturbances Each report contains current and voltage information relay element states and input output contact information If you question the...

Page 558: ...he low level test interface Access the test interface by removing the relay front panel Figure 13 1 shows the low level interface connections This drawing also appears on the inside of the relay front panel Remove the ribbon cable between the two modules to access the outputs of the input module and the inputs to the processing module relay main board You can test the relay processing module using...

Page 559: ... Use this method to verify the pickup settings of protection elements Access the front panel TAR command from the front panel OTHER pushbutton menu To display the state of the 51PT element on the front panel display press the OTHER pushbutton cursor to the TAR option and press SELECT Press the up arrow pushbutton until TAR 28 is displayed on the top row of the LCD The bottom row of the LCD display...

Page 560: ...SER1 51P 51PT Element 51P asserts when phase current is above the pickup of the phase time overcurrent element Element 51PT asserts when the phase time overcurrent element times out The assertion and deassertion of these elements is time stamped in the SER report Use this method to verify timing associated with time overcurrent elements reclosing relay operation etc Do not forget to reenter the co...

Page 561: ...tector EDD N to allow the use of slowly changing currents SEL 311L Relay 87L Element Test Procedure Purpose Test the accuracy of phase and negative sequence 87L elements Test the ground 87L element using an identical procedure Test Outline Test the phase 87L element accuracy for A phase B and C phase optional then test the negative sequence 87L element accuracy Detailed test procedure follows I Te...

Page 562: ...ent Test the negative sequence restraint element R87L2 To test the restraint element apply a single phase current to the local relay This simulates a weak infeed internal fault deasserts the restraint element R87L2 and causes both relays to trip Then increase the remote current until the R87L2 asserts in the local relay Continue to increase the remote current until R87L2 deasserts Finally apply an...

Page 563: ...es IB 2 5 A 120 degrees IC 2 5 A 120 degrees 3 Increase IA in the remote relay at 0 degrees until the relay trips Record the remote A phase current which causes the relay to trip Ensure it is within the range indicated 3 4 A _________ 3 6 A 4 Return A phase current to 2 5 A and repeat with the B and C phase currents if desired Expect similar results 5 Apply the following currents Local Relay IA 2 ...

Page 564: ...lay use the TAR R87LA 10000 command to display the R87LA Relay Word bit 10 000 times or use the front panel TAR command to display Relay Word row 57 Ensure bit R87LA is asserted 10 Increase the remote A phase current at 180 degrees until the R87LA bit is no longer solidly asserted until it begins to deassert Record the remote A phase current required to begin to deassert R87LA in Table 13 2 Ensure...

Page 565: ...ve until Relay Word bit R87LA is solidly asserted Record the angle of IA required to solidly assert R87LA Ensure it is within the range expected 85 degrees _________ 80 degrees II Negative Sequence 87L Element Tests 1 Make settings 87L2P 0 5 87LGP OFF 87LPP OFF 2 Apply the following currents Local Relay IA 0 75 A 0 degrees IB 0 75 A 120 degrees IC 0 75 A 120 degrees Remote Relay IA 0 75 A 0 degree...

Page 566: ...77 0 400 140 0 377 0 400 100 0 377 0 400 60 No Assertion No Assertion 0 No Assertion No Assertion 60 No Assertion No Assertion 100 0 377 0 400 140 0 377 0 400 8 Apply the following currents Local Relay IA 2 33 A 0 degrees Remote Relay IA 13 A 180 degrees The SEL 311L Relay is rated to withstand 3 Inom indefinitely 9 In the local relay use the TAR R87L2 10000 command to display the R87L2 Relay Word...

Page 567: ...ed 80 degrees _________ 85 degrees 15 Decrease the angle on the remote IA from zero more negative until Relay Word bit R87L2 is solidly asserted Record the angle of IA required to solidly assert R87LA Ensure it is within the range expected 85 degrees _________ 80 degrees RELAY SELF TESTS The relay runs a variety of self tests The relay takes the following corrective actions for out of tolerance co...

Page 568: ...tion Disabled ALARM Output Description IA IB IC IP VA VB VC VS Offset Warning 30 mV No Pulsed Measures the dc offset at each of the input channels every 10 seconds Master Offset Warning 20 mV No Pulsed Measures the dc offset at the A D every 10 seconds Failure 30 mV Yes Latched 5 V PS Warning 4 80 V 5 20 V No Pulsed Measures the 5 V power supply every 10 seconds Failure 4 65 V 5 40 V Yes Latched 5...

Page 569: ... a checksum test on the active copy of the relay settings every 10 seconds EEPROM Failure checksum Yes Latched Performs a checksum test on the nonvolatile copy of the relay settings every 10 seconds 87L RAM Failure 87L only disabled 87HWAL asserted ALARM pulsed Periodically performs a read write test at each RAM location 87L ROM Failure checksum 87L only disabled 87HWAL asserted ALARM pulsed Perfo...

Page 570: ...or Failure Yes Latched The microprocessor examines each program instruction memory access and interrupt The relay displays VECTOR nn on the LCD upon detection of an invalid instruction memory access or spurious interrupt The test runs continuously RELAY TROUBLESHOOTING Inspection Procedure Complete the following procedure before disturbing the relay After you finish the inspection proceed to the T...

Page 571: ...ing using the front panel SET buttons to see if the port is set to LMD and to see the address Relay Does Not Respond to Faults 1 Verify that the 87CH FAIL front panel LED is extinguished 2 Verify that the relay is properly set 3 Verify that the test source is properly set 4 Verify that the test connections are correct using the MET command 5 Ensure that the analog input cable between transformer s...

Page 572: ...that channel has a problem in the receive direction If neither bit is asserted go to Step 3 b i If the RX LED is illuminated the local relay is receiving valid packets from the remote relay If the RX LED is not illuminated go to Step 3 a ii Verify that the associated address settings are correct in remote and local relays RA_X TA_X using the SET X command or RA_Y and TA_Y using the SET Y command T...

Page 573: ...32 dBm for an IEEE Proposed Standard PC37 94 interface For all interface types verify that the remote relay channel settings are correct and that the rear panel TX LED is illuminated on the remote relay If the remote relay TX LED is illuminated and the local relay RX LED is extinguished the transmit data that leaves the remote relay does not arrive at the local relay b If AVAX RBADX and DBADX are ...

Page 574: ......

Page 575: ... 87L Differential Protection with Overcurrent Backup 14 1 Application Settings 14 3 APP 87L Settings Sheets 14 5 Application Setting 87L21 Differential Protection with Step Distance Backup 14 21 Application Settings 14 23 APP 87L21 Settings Sheets 14 27 Application Setting 87L21P Differential Protection with Piloted Step Distance Backup 14 47 Application Settings 14 49 APP 87L21P Settings Sheets 1...

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Page 577: ... communications channel failure No potentials are required by the relay in this application When APP 87L the SEL 311L 1 Configures itself as full function differential relay All differential and tapped load settings are available 2 Enables two phase overcurrent and two ground overcurrent elements 50P instantaneous definite time phase overcurrent element E50P 1 50G instantaneous definite time groun...

Page 578: ...D N Switch onto fault ESOTF N Voltage elements EVOLT N Synchronism check elements E25 N Frequency elements E81 N Fault locator EFLOC N Loss of potential ELOP N Communications assisted trip schemes ECOMM N Reclosing E79 N CCVT transient protection ECCVT N SELOGIC Latch bits ELAT N Advanced settings EADVS N Ground directional element priority ORDER OFF 5 Changes default SELOGIC control equations to ...

Page 579: ...tting APP back to 87L Application Settings From Access Level 2 set the SEL 311L application setting to 87L as shown below SET APP TERSE ENTER Identifier and Configuration Settings Application 87L 87L21 87L21P 311L APP 311L 87L ENTER Line Current Differential Configuration Settings Number of 87L Terminals 2 3 3R N E87L 2 END ENTER Save Changes Y N Y ENTER Settings saved The following settings are a...

Page 580: ...51PT 51GT OC ULTR 50L 51G 52A IN101 CL CC ULCL TRIP TRIP87 67P1TC 87LPE 87HWAL 67G1TC 87LPE 87HWAL 51PTC 87LPE 87HWAL 51GTC 87LPE 87HWAL OUT101 TRIP OUT102 TRIP OUT103 CLOSE OUT104 0 OUT105 0 OUT106 0 OUT107 87HWAL OUT201 TRIP TRIP87 Press RETURN to continue OUT202 TRIP TRIP87 OUT203 0 OUT204 0 OUT205 0 OUT206 0 ER B87L2 50P1 50G1 51P 51G T1X 0 T2X 0 T1Y 0 T2Y 0 ...

Page 581: ...igh speed tripping 1 6 N EHST If 87L 2 or 3 the following choices are available Enable high speed direct transfer trip Y N EHSDTT Enable disturbance detect Y N EDD Tapped load coordination Y N ETAP If the relay has two channels and E87L 2 or 3R Primary channel X Y PCHAN If the relay has two channels and E87L 2 Hot standby channel feature Y N EHSC If PCHAN X or EHSC Y or E87L 3 CTR at terminal conn...

Page 582: ...ercurrent Element Settings If ETG Y Pickup OFF 0 50 16 00 A secondary T51GP Curve U1 U5 C1 C5 T51GC Time dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 T51GTD Electromechanical reset delay Y N T51GRS Tapped Load Residual Ground Inst Def Time Overcurrent Element Settings Pickup OFF 0 50 16 00 A secondary T50GP Time delay OFF 0 00 16000 00 cycles T50GD Tapped Load Negative Sequence Time...

Page 583: ...ent Time Delay See Figure 3 45 Level 1 0 00 16000 00 cycles in 0 25 cycle steps 67G1D Phase Time Overcurrent Element See Figure 3 47 Pickup OFF 0 50 16 00 A secondary 5 A nom 0 10 3 20 A secondary 1 A nom 51PP Curve U1 U5 C1 C5 see Figures 9 1 through 9 10 51PC Time Dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 51PTD Electromechanical Reset Y N 51PRS Residual Ground Time Overcurrent ...

Page 584: ... command CL Unlatch close conditions ULCL Torque Control Equations for Inst Def Time Overcurrent Elements Note torque control equation settings cannot be set directly to logical 0 Level 1 phase see Figure 3 42 67P1TC Level 1 residual ground see Figure 3 45 67G1TC Torque Control Equations for Time Overcurrent Elements Note torque control equation settings cannot be set directly to logical 0 Phase e...

Page 585: ...ntact OUT203 OUT203 Output Contact OUT204 OUT204 Output Contact OUT205 OUT205 Output Contact OUT206 OUT206 Other Equations Event report trigger conditions see Section 12 ER MIRRORED BITS Transmit Equations See Appendix I Channel A transmit bit 1 TMB1A Channel A transmit bit 2 TMB2A Channel A transmit bit 3 TMB3A Channel A transmit bit 4 TMB4A Channel A transmit bit 5 TMB5A Channel A transmit bit 6...

Page 586: ...1L RELAY APP 87L Date SELOGIC CONTROL EQUATION SETTINGS SERIAL PORT COMMAND SET L Date Code 20011112 87L Transmit Bit Equations Channel X transmit bit 1 T1X Channel X transmit bit 2 T2X Channel Y transmit bit 1 T1Y Channel Y transmit bit 2 T2Y ...

Page 587: ...ate 1 60 seconds SCROLD ________ Event Report Parameters See Section 12 Length of event report 15 30 60 cycles LER Length of pre fault in event report 1 14 cycles in 1 cycle steps for LER 15 PRE 1 29 cycles in 1 cycle steps for LER 30 1 59 cycles in 1 cycle steps for LER 60 Station DC Battery Monitor See Figures 8 9 and 8 10 DC battery instantaneous undervoltage pickup OFF 20 300 Vdc DCLOP DC batt...

Page 588: ... following settings if preceding enable setting EBMON Y Close Open set point 1 max 0 65000 operations COSP1 Close Open set point 2 mid 0 65000 operations COSP2 Close Open set point 3 min 0 65000 operations COSP3 kA Interrupted set point 1 min 0 00 999 00 kA primary in 0 01 kA steps KASP1 kA Interrupted set point 2 mid 0 00 999 00 kA primary in 0 01 kA steps KASP2 kA Interrupted set point 3 max 0 0...

Page 589: ...11112 Sequential Events Recorder settings are comprised of three trigger lists Each trigger list can include up to 24 Relay Word bits delimited by commas Enter NA to remove a list of these Relay Word bit settings See Sequential Events Recorder SER Report in Section 12 SER Trigger List 1 SER1 SER Trigger List 2 SER2 SER Trigger List 3 SER3 ...

Page 590: ...LB2 Local Bit LB3 Name 14 characters NLB3 Clear Local Bit LB3 Label 7 characters CLB3 Set Local Bit LB3 Label 7 characters SLB3 Pulse Local Bit LB3 Label 7 characters PLB3 Local Bit LB4 Name 14 characters NLB4 Clear Local Bit LB4 Label 7 characters CLB4 Set Local Bit LB4 Label 7 characters SLB4 Pulse Local Bit LB4 Label 7 characters PLB4 Local Bit LB5 Name 14 characters NLB5 Clear Local Bit LB5 La...

Page 591: ...e 14 characters NLB11 Clear Local Bit LB11 Label 7 characters CLB11 Set Local Bit LB11 Label 7 characters SLB11 Pulse Local Bit LB11 Label 7 characters PLB11 Local Bit LB12 Name 14 characters NLB12 Clear Local Bit LB12 Label 7 characters CLB12 Set Local Bit LB12 Label 7 characters SLB12 Pulse Local Bit LB12 Label 7 characters PLB12 Local Bit LB13 Name 14 characters NLB13 Clear Local Bit LB13 Label...

Page 592: ...ters DP4_1 Display if DP4 logical 0 16 characters DP4_0 Display if DP5 logical 1 16 characters DP5_1 Display if DP5 logical 0 16 characters DP5_0 Display if DP6 logical 1 16 characters DP6_1 Display if DP6 logical 0 16 characters DP6_0 Display if DP7 logical 1 16 characters DP7_1 Display if DP7 logical 0 16 characters DP7_0 Display if DP8 logical 1 16 characters DP8_1 Display if DP8 logical 0 16 c...

Page 593: ...gical 0 16 characters DP14_0 Display if DP15 logical 1 16 characters DP15_1 Display if DP15 logical 0 16 characters DP15_0 Display if DP16 logical 1 16 characters DP16_1 Display if DP16 logical 0 16 characters DP16_0 Reclosing Relay Labels See Functions Unique to the Front Panel Interface in Section 11 Reclosing Relay Last Shot Label 14 char 79LL Reclosing Relay Shot Counter Label 14 char 79SL ...

Page 594: ...Settings See Below Time out 0 30 minutes T_OUT DTA Meter Format Y N DTA Send Auto Messages to Port Y N AUTO Enable Hardware Handshaking Y N MBT Refer to Appendix I for details on setting MBT RTSCTS Fast Operate Enable Y N FASTOP Other Port Settings Set T_OUT to the number of minutes of serial port inactivity for an automatic log out Set T_OUT 0 for no port time out Set DTA Y to allow an SEL DTA or...

Page 595: ...e clock edge detect R Rising F Falling RC422X EIA 422 transmit clock edge detect R Rising F Falling TC422X If CHANX type is not EIA 422 Timing source I Internal E External TIMRX 87L Channel Y Configuration Settings Channel Y address check Y N EADDCY If EADDCY Y Channel Y transmit address 1 16 TA_Y Channel Y receive address 1 16 RA_Y Continuous dropout alarm 1 1000 seconds RBADYP Packets lost in la...

Page 596: ......

Page 597: ...element may be used with switch onto fault logic Consider using switch onto fault logic when applying line side PTs and when relay potentials are unavailable before breaker closing When APP 87L21 the SEL 311L 1 Configures itself as full function differential relay All differential and tapped load settings are available 2 Configures itself as a three zone step distance phase mho and ground mho rela...

Page 598: ...rcurrent element E51P N 51Q inverse time negative sequence overcurrent elements E51Q N Out of step elements EOOS N Load encroachment elements ELOAD N Voltage elements EVOLT N Synchronism check elements E25 N Frequency elements E81 N Communications assisted trip schemes ECOMM N Advanced settings EADVS N 7 Automatically calculates Directional settings See Settings Made Automatically in Section 4 Los...

Page 599: ... APP 311L to APP 87L21 changes settings in the SEL 311L Changing from APP 87L21 to APP 311L makes more SEL 311L settings visible but does not change any other settings If SEL 311L functions are used after setting APP is changed from 87L21 to 311L do not change setting APP back to 87L21 Application Settings From Access Level 2 set the SEL 311L application setting to 87L21 as shown below SET APP TER...

Page 600: ...GP OFF CTALRM 0 50 87LR 6 0 87LANG 195 CTRP 200 PTR 2000 00 PTRS 2000 00 Z1MAG 7 80 Z1ANG 84 00 Z0MAG 24 80 Z0ANG 81 50 LL 100 00 ELOP Y1 E79 N ECCVT N ESV N ELAT N EDP 3 Z1P 6 24 Z2P 9 36 Z3P OFF Z1MG 6 24 Z2MG 9 36 Z3MG OFF Z1PD OFF Z2PD 20 00 Z3PD OFF Z1GD OFF Z2GD 20 00 Z3GD OFF Z1D OFF Z2D OFF Z3D OFF Press RETURN to continue 50P1P OFF 67P1D 0 00 50G1P OFF 67G1D 0 00 51GP OFF 51GC U3 51GTD 2 ...

Page 601: ...R 50L 51G 52A IN101 CL CC ULCL TRIP TRIP87 67P1TC 1 67G1TC 1 51GTC 32GF OUT101 TRIP OUT102 TRIP OUT103 CLOSE OUT104 0 OUT105 0 OUT106 0 OUT107 87HWAL Press RETURN to continue OUT201 TRIP TRIP87 OUT202 TRIP TRIP87 OUT203 0 OUT204 0 OUT205 0 OUT206 0 DP1 52A DP2 CHXAL DP3 CHYAL SS1 0 SS2 0 SS3 0 SS4 0 SS5 0 SS6 0 ER B87L2 M2P Z2G 51G 50P1 LOP FAULT 87L M2P Z2G 51G T1X 0 Press RETURN to continue T2X ...

Page 602: ......

Page 603: ...e High speed tripping 1 6 N EHST If 87L 2 or 3 the following choices are available Enable high speed direct transfer trip Y N EHSDTT Enable disturbance detect Y N EDD Tapped load coordination Y N ETAP If the relay has two channels and E87L 2 or 3R Primary channel X Y PCHAN If the relay has two channels and E87L 2 Hot standby channel feature Y N EHSC If PCHAN X or EHSC Y or E87L 3 CTR at terminal c...

Page 604: ...F 0 50 16 00 A secondary T51GP Curve U1 U5 C1 C5 T51GC Time dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 T51GTD Electromechanical reset delay Y N T51GRS Tapped Load Residual Ground Inst Def Time Overcurrent Element Settings Pickup OFF 0 50 16 00 A secondary T50GP Time delay OFF 0 00 16000 00 cycles T50GD Tapped Load Negative Sequence Time Overcurrent Element Settings If ETQ Y Pickup...

Page 605: ...res N 1 4 see Reclosing Relay in Section 6 E79 CCVT transient detection Y N see Figure 4 2 ECCVT SELOGIC control equation Variable Timers N 1 16 see Figures 7 23 and 7 24 ESV SELOGIC Latch Bits N 1 16 ELAT SELOGIC Display Points N 1 16 EDP Mho Phase Distance Elements Zone 1 OFF 0 05 64 00 8 secondary 5 A nom 0 25 320 00 8 secondary 1 A nom see Figure 3 29 Z1P Zone 2 OFF 0 05 64 00 8 secondary 5 A ...

Page 606: ... 0 00 16000 00 cycles Z3D Phase Inst Def Time Overcurrent Elements See Figure 3 42 Level 1 OFF 0 25 100 00 A secondary 5 A nom 0 05 20 00 A secondary 1 A nom 50P1P Phase Definite Time Overcurrent Element Time Delays See Figure 3 42 Level 1 0 00 16000 00 cycles in 0 25 cycle steps 67P1D Residual Ground Inst Def Time Overcurrent Elements See Figure 3 45 Level 1 OFF 0 25 100 00 A secondary 5 A nom 0 ...

Page 607: ...0 cycles in 0 25 cycle steps SOTFD Other Settings Minimum trip duration time 4 00 16000 00 cycles in 0 25 cycle steps see Figure 5 1 TDURD Close failure time delay OFF 0 00 16000 00 cycles in 0 25 cycle steps see Figure 6 1 CFD SELOGIC Control Equation Variable Timers See Figures 7 23 and 7 24 Number of timer pickup dropout settings dependent on preceding enable setting ESV 1 16 SV1 Pickup Time 0 ...

Page 608: ...0 cycles in 0 25 cycle steps SV11PU SV11 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV11DO SV12 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV12PU SV12 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV12DO SV13 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV13PU SV13 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV13DO SV14 Pickup Time 0 00 16000 00 cycle...

Page 609: ...to fault trip conditions TRSOTF Direct transfer trip conditions DTT Unlatch trip conditions ULTR Close Logic Equations See Figure 6 1 Circuit breaker status used in Figure 5 5 also 52A Close conditions other than automatic reclosing or CLOSE command CL Unlatch close conditions ULCL Reclosing Relay Equations See Reclosing Relay in Section 6 Reclose initiate 79RI Reclose initiate supervision 79RIS D...

Page 610: ...t LT14 RST14 Set Latch Bit LT15 SET15 Reset Latch Bit LT15 RST15 Set Latch Bit LT16 SET16 Reset Latch Bit LT16 RST16 Torque Control Equations for Inst Def Time Overcurrent Elements Note torque control equation settings cannot be set directly to logical 0 Level 1 phase see Figure 3 42 67P1TC Level 1 residual ground see Figure 3 45 67G1TC Torque Control Equations for Time Overcurrent Elements Note t...

Page 611: ...tion Variable SV3 SV3 SELOGIC control equation Variable SV4 SV4 SELOGIC control equation Variable SV5 SV5 SELOGIC control equation Variable SV6 SV6 SELOGIC control equation Variable SV7 SV7 SELOGIC control equation Variable SV8 SV8 SELOGIC control equation Variable SV9 SV9 SELOGIC control equation Variable SV10 SV10 SELOGIC control equation Variable SV11 SV11 SELOGIC control equation Variable SV12...

Page 612: ...ng Default Display in Sections 7 and 11 Display Point DP1 DP1 Display Point DP2 DP2 Display Point DP3 DP3 Display Point DP4 DP4 Display Point DP5 DP5 Display Point DP6 DP6 Display Point DP7 DP7 Display Point DP8 DP8 Display Point DP9 DP9 Display Point DP10 DP10 Display Point DP11 DP11 Display Point DP12 DP12 Display Point DP13 DP13 Display Point DP14 DP14 Display Point DP15 DP15 Display Point DP16...

Page 613: ...ORED BITS Transmit Equations See Appendix I Channel A transmit bit 1 TMB1A Channel A transmit bit 2 TMB2A Channel A transmit bit 3 TMB3A Channel A transmit bit 4 TMB4A Channel A transmit bit 5 TMB5A Channel A transmit bit 6 TMB6A Channel A transmit bit 7 TMB7A Channel A transmit bit 8 TMB8A Channel B transmit bit 1 TMB1B Channel B transmit bit 2 TMB2B Channel B transmit bit 3 TMB3B Channel B trans...

Page 614: ... rate 1 60 seconds SCROLD ________ Event Report Parameters See Section 12 Length of event report 15 30 60 cycles LER Length of pre fault in event report 1 14 cycles in 1 cycle steps for LER 15 PRE 1 29 cycles in 1 cycle steps for LER 30 1 59 cycles in 1 cycle steps for LER 60 Station DC Battery Monitor See Figures 8 9 and 8 10 DC battery instantaneous undervoltage pickup OFF 20 300 Vdc DCLOP DC ba...

Page 615: ...e following settings if preceding enable setting EBMON Y Close Open set point 1 max 0 65000 operations COSP1 Close Open set point 2 mid 0 65000 operations COSP2 Close Open set point 3 min 0 65000 operations COSP3 kA Interrupted set point 1 min 0 00 999 00 kA primary in 0 01 kA steps KASP1 kA Interrupted set point 2 mid 0 00 999 00 kA primary in 0 01 kA steps KASP2 kA Interrupted set point 3 max 0 ...

Page 616: ...0010625 Sequential Events Recorder settings are comprised of three trigger lists Each trigger list can include up to 24 Relay Word bits delimited by commas Enter NA to remove a list of these Relay Word bit settings See Sequential Events Recorder SER Report in Section 12 SER Trigger List 1 SER1 SER Trigger List 2 SER2 SER Trigger List 3 SER3 ...

Page 617: ...PLB2 Local Bit LB3 Name 14 characters NLB3 Clear Local Bit LB3 Label 7 characters CLB3 Set Local Bit LB3 Label 7 characters SLB3 Pulse Local Bit LB3 Label 7 characters PLB3 Local Bit LB4 Name 14 characters NLB4 Clear Local Bit LB4 Label 7 characters CLB4 Set Local Bit LB4 Label 7 characters SLB4 Pulse Local Bit LB4 Label 7 characters PLB4 Local Bit LB5 Name 14 characters NLB5 Clear Local Bit LB5 L...

Page 618: ...me 14 characters NLB11 Clear Local Bit LB11 Label 7 characters CLB11 Set Local Bit LB11 Label 7 characters SLB11 Pulse Local Bit LB11 Label 7 characters PLB11 Local Bit LB12 Name 14 characters NLB12 Clear Local Bit LB12 Label 7 characters CLB12 Set Local Bit LB12 Label 7 characters SLB12 Pulse Local Bit LB12 Label 7 characters PLB12 Local Bit LB13 Name 14 characters NLB13 Clear Local Bit LB13 Labe...

Page 619: ...cters DP4_1 Display if DP4 logical 0 16 characters DP4_0 Display if DP5 logical 1 16 characters DP5_1 Display if DP5 logical 0 16 characters DP5_0 Display if DP6 logical 1 16 characters DP6_1 Display if DP6 logical 0 16 characters DP6_0 Display if DP7 logical 1 16 characters DP7_1 Display if DP7 logical 0 16 characters DP7_0 Display if DP8 logical 1 16 characters DP8_1 Display if DP8 logical 0 16 ...

Page 620: ...ogical 0 16 characters DP14_0 Display if DP15 logical 1 16 characters DP15_1 Display if DP15 logical 0 16 characters DP15_0 Display if DP16 logical 1 16 characters DP16_1 Display if DP16 logical 0 16 characters DP16_0 Reclosing Relay Labels See Functions Unique to the Front Panel Interface in Section 11 Reclosing Relay Last Shot Label 14 char 79LL Reclosing Relay Shot Counter Label 14 char 79SL ...

Page 621: ... Settings See Below Time out 0 30 minutes T_OUT DTA Meter Format Y N DTA Send Auto Messages to Port Y N AUTO Enable Hardware Handshaking Y N MBT Refer to Appendix I for details on setting MBT RTSCTS Fast Operate Enable Y N FASTOP Other Port Settings Set T_OUT to the number of minutes of serial port inactivity for an automatic log out Set T_OUT 0 for no port time out Set DTA Y to allow an SEL DTA o...

Page 622: ...ve clock edge detect R Rising F Falling RC422X EIA 422 transmit clock edge detect R Rising F Falling TC422X If CHANX type is not EIA 422 Timing source I Internal E External TIMRX 87L Channel Y Configuration Settings Channel Y address check Y N EADDCY If EADDCY Y Channel Y transmit address 1 16 TA_Y Channel Y receive address 1 16 RA_Y Continuous dropout alarm 1 1000 seconds RBADYP Packets lost in l...

Page 623: ...ng for forward faults and provide Zone 3 reverse fault blocking for communications assisted schemes One phase overcurrent element 50P1 This element may be used with switch onto fault logic Consider using switch onto fault logic when applying line side PTs and when relay potentials are unavailable before breaker closing When APP 87L21P the SEL 311L 1 Configures itself as full function differential ...

Page 624: ...vercurrent element E51P N 51Q inverse time negative sequence overcurrent elements E51Q N Out of step elements EOOS N Load encroachment elements ELOAD N Voltage elements EVOLT N Synchronism check elements E25 N Frequency elements E81 N Advanced settings EADVS N 7 Automatically calculates Directional settings See Settings Made Automatically in Section 4 Loss of Potential CCVT Transient Detection Loa...

Page 625: ...P 311L to APP 87L21P changes settings in the SEL 311L Changing from APP 87L21P to APP 311L makes more SEL 311L settings visible but does not change any other settings If SEL 311L functions are used after setting APP is changed from 87L21P to 311L do not change setting APP back to 87L21P Application Settings From Access Level 2 set the SEL 311L application setting to 87L21P as shown below SET APP T...

Page 626: ... 2000 00 PTRS 2000 00 Z1MAG 7 80 Z1ANG 84 00 Z0MAG 24 80 Z0ANG 81 50 LL 100 00 ELOP Y1 ECOMM N E79 N ECCVT N ESV N ELAT N EDP 3 Z1P 6 24 Z2P 9 36 Z3P 2 34 Z4P OFF Z1MG 6 24 Z2MG 9 36 Z3MG 2 34 Z4MG OFF Z1PD OFF Z2PD 20 00 Z3PD OFF Z4PD OFF Z1GD OFF Z2GD 20 00 Z3GD OFF Z4GD OFF Z1D OFF Z2D OFF Z3D OFF Z4D OFF Press RETURN to continue 50P1P OFF 67P1D 0 00 50G1P OFF 50G2P OFF 50G3P OFF 67G1D 0 00 67G...

Page 627: ... 52A IN101 CL CC ULCL TRIP TRIP87 67P1TC 1 67G1TC 1 67G2TC 1 67G3TC 1 51GTC 32GF OUT101 TRIP OUT102 TRIP OUT103 CLOSE OUT104 0 OUT105 0 Press RETURN to continue OUT106 0 OUT107 87HWAL OUT201 TRIP TRIP87 OUT202 TRIP TRIP87 OUT203 0 OUT204 0 OUT205 0 OUT206 0 DP1 52A DP2 CHXAL DP3 CHYAL SS1 0 SS2 0 SS3 0 SS4 0 SS5 0 SS6 0 ER B87L2 M2P Z2G 51G 50P1 LOP FAULT 87L M2P Z2G 51G T1X 0 Press RETURN to cont...

Page 628: ......

Page 629: ...le High speed tripping 1 6 N EHST If 87L 2 or 3 the following choices are available Enable high speed direct transfer trip Y N EHSDTT Enable disturbance detect Y N EDD Tapped load coordination Y N ETAP If the relay has two channels and E87L 2 or 3R Primary channel X Y PCHAN If the relay has two channels and E87L 2 Hot standby channel feature Y N EHSC If PCHAN X or EHSC Y or E87L 3 CTR at terminal ...

Page 630: ...F 0 50 16 00 A secondary T51GP Curve U1 U5 C1 C5 T51GC Time dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 T51GTD Electromechanical reset delay Y N T51GRS Tapped Load Residual Ground Inst Def Time Overcurrent Element Settings Pickup OFF 0 50 16 00 A secondary T50GP Time delay OFF 0 00 16000 00 cycles T50GD Tapped Load Negative Sequence Time Overcurrent Element Settings If ETQ Y Pickup...

Page 631: ...otential Y Y1 N see Figure 4 1 ELOP Communications assisted trip scheme N DCB POTT DCUB1 DCUB2 see Communications Assisted Trip Logic General Overview in Section 5 ECOMM Reclosures N 1 4 see Reclosing Relay in Section 6 E79 CCVT transient detection Y N see Figure 4 2 ECCVT SELOGIC control equation Variable Timers N 1 16 see Figures 7 23 and 7 24 ESV SELOGIC Latch Bits N 1 16 ELAT SELOGIC Display P...

Page 632: ...0 cycles Z2PD Zone 3 time delay OFF 0 00 16000 00 cycles Z3PD Zone 4 time delay OFF 0 00 16000 00 cycles Z4PD Quadrilateral and Mho Ground Distance Element Time Delays See Figure 3 39 Zone 1 time delay OFF 0 00 16000 00 cycles Z1GD Zone 2 time delay OFF 0 00 16000 00 cycles Z2GD Zone 3 time delay OFF 0 00 16000 00 cycles Z3GD Zone 4 time delay OFF 0 00 16000 00 cycles Z4GD Common Phase Ground Dist...

Page 633: ...0 10 3 20 A secondary 1 A nom 51GP Curve U1 U5 C1 C5 see Figures 9 1 through 9 10 51GC Time Dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 51GTD Electromechanical Reset Y N 51GRS Zone Level 3 and 4 Directional Control Zone Level 3 direction Forward Reverse F R DIR3 Zone Level 4 direction Forward Reverse F R DIR4 Reclosing Relay See Tables 6 2 and 6 3 Make the following settings if pre...

Page 634: ...e undervoltage 0 0 260 0 V secondary 27PPW WIF zero sequence 3V0 overvoltage 0 0 150 0 V secondary 59NW Additional DCUB Trip Scheme Settings See Figure 5 12 Make the following settings if preceding enable setting ECOMM DCUB1 or DCUB2 Guard present security time delay 0 00 16000 00 cycles in 0 25 cycle steps GARD1D DCUB disabling time delay 0 25 16000 00 cycles in 0 25 cycle steps UBDURD DCUB durat...

Page 635: ...me 0 00 16000 00 cycles in 0 25 cycle steps SV7PU SV7 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV7DO SV8 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV8PU SV8 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV8DO SV9 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV9PU SV9 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV9DO SV10 Pickup Time 0 00 16000 00 c...

Page 636: ...ns TRSOTF Direct transfer trip conditions DTT Unlatch trip conditions ULTR Communications Assisted Trip Scheme Input Equations Permissive trip 1 used for ECOMM POTT DCUB1 or DCUB2 see Figures 5 7 5 9 and 5 12 PT1 Loss of guard 1 used for ECOMM DCUB1 or DCUB2 see Figure 5 12 LOG1 Permissive trip 2 used for ECOMM DCUB2 see Figures 5 7 and 5 12 PT2 Loss of guard 2 used for ECOMM DCUB2 see Figure 5 12...

Page 637: ...h Bit LT5 SET5 Reset Latch Bit LT5 RST5 Set Latch Bit LT6 SET6 Reset latch Bit LT6 RST6 Set Latch Bit LT7 SET7 Reset Latch Bit LT7 RST7 Set Latch Bit LT8 SET8 Reset Latch Bit LT8 RST8 Set Latch Bit LT9 SET9 Reset Latch Bit LT9 RST9 Set Latch Bit LT10 SET10 Reset Latch Bit LT10 RST10 Set Latch Bit LT11 SET11 Reset Latch Bit LT11 RST11 Set Latch Bit LT12 SET12 Reset Latch Bit LT12 RST12 Set Latch Bi...

Page 638: ...TC Ground inverse time see Figure 3 24 T51GTC Negative sequence time see Figure 3 25 T51QTC Torque Control Equations for Tapped Load Inst Def Time Overcurrent Elements Note torque control equation settings cannot be set directly to logical 0 Phase instantaneous see Figure 3 20 T50PTC Ground instantaneous see Figure 3 21 T50GTC Negative sequence instantaneous see Figure 3 22 T50QTC SELOGIC Control ...

Page 639: ...put Contact OUT107 OUT107 Output Contact Equations Differential Board See Figure 7 27 Output Contact OUT201 OUT201 Output Contact OUT202 OUT202 Output Contact OUT203 OUT203 Output Contact OUT204 OUT204 Output Contact OUT205 OUT205 Output Contact OUT206 OUT206 Display Point Equations See Rotating Default Display in Sections 7 and 11 Display Point DP1 DP1 Display Point DP2 DP2 Display Point DP3 DP3 ...

Page 640: ...g updating and peak recording and block max min metering see Demand Metering and Maximum Minimum Metering in Section 8 FAULT Breaker monitor initiation see Figure 8 3 BKMON MIRRORED BITS Transmit Equations See Appendix I Channel A transmit bit 1 TMB1A Channel A transmit bit 2 TMB2A Channel A transmit bit 3 TMB3A Channel A transmit bit 4 TMB4A Channel A transmit bit 5 TMB5A Channel A transmit bit 6...

Page 641: ...L RELAY APP 87L21P Date SELOGIC CONTROL EQUATION SETTINGS SERIAL PORT COMMAND SET L Date Code 20010625 87L Transmit Bit Equations Channel X transmit bit 1 T1X Channel X transmit bit 2 T2X Channel Y transmit bit 1 T1Y Channel Y transmit bit 2 T2Y ...

Page 642: ... rate 1 60 seconds SCROLD ________ Event Report Parameters See Section 12 Length of event report 15 30 60 cycles LER Length of pre fault in event report 1 14 cycles in 1 cycle steps for LER 15 PRE 1 29 cycles in 1 cycle steps for LER 30 1 59 cycles in 1 cycle steps for LER 60 Station DC Battery Monitor See Figures 8 9 and 8 10 DC battery instantaneous undervoltage pickup OFF 20 300 Vdc DCLOP DC ba...

Page 643: ...he following settings if preceding enable setting EBMON Y Close Open set point 1 max 0 65000 operations COSP1 Close Open set point 2 mid 0 65000 operations COSP2 Close Open set point 3 min 0 65000 operations COSP3 kA Interrupted set point 1 min 0 00 999 00 kA primary in 0 01 kA steps KASP1 kA Interrupted set point 2 mid 0 00 999 00 kA primary in 0 01 kA steps KASP2 kA Interrupted set point 3 max 0...

Page 644: ...0010625 Sequential Events Recorder settings are comprised of three trigger lists Each trigger list can include up to 24 Relay Word bits delimited by commas Enter NA to remove a list of these Relay Word bit settings See Sequential Events Recorder SER Report in Section 12 SER Trigger List 1 SER1 SER Trigger List 2 SER2 SER Trigger List 3 SER3 ...

Page 645: ...PLB2 Local Bit LB3 Name 14 characters NLB3 Clear Local Bit LB3 Label 7 characters CLB3 Set Local Bit LB3 Label 7 characters SLB3 Pulse Local Bit LB3 Label 7 characters PLB3 Local Bit LB4 Name 14 characters NLB4 Clear Local Bit LB4 Label 7 characters CLB4 Set Local Bit LB4 Label 7 characters SLB4 Pulse Local Bit LB4 Label 7 characters PLB4 Local Bit LB5 Name 14 characters NLB5 Clear Local Bit LB5 L...

Page 646: ...ame 14 characters NLB11 Clear Local Bit LB11 Label 7 characters CLB11 Set Local Bit LB11 Label 7 characters SLB11 Pulse Local Bit LB11 Label 7 characters PLB11 Local Bit LB12 Name 14 characters NLB12 Clear Local Bit LB12 Label 7 characters CLB12 Set Local Bit LB12 Label 7 characters SLB12 Pulse Local Bit LB12 Label 7 characters PLB12 Local Bit LB13 Name 14 characters NLB13 Clear Local Bit LB13 Lab...

Page 647: ...acters DP4_1 Display if DP4 logical 0 16 characters DP4_0 Display if DP5 logical 1 16 characters DP5_1 Display if DP5 logical 0 16 characters DP5_0 Display if DP6 logical 1 16 characters DP6_1 Display if DP6 logical 0 16 characters DP6_0 Display if DP7 logical 1 16 characters DP7_1 Display if DP7 logical 0 16 characters DP7_0 Display if DP8 logical 1 16 characters DP8_1 Display if DP8 logical 0 16...

Page 648: ...logical 0 16 characters DP14_0 Display if DP15 logical 1 16 characters DP15_1 Display if DP15 logical 0 16 characters DP15_0 Display if DP16 logical 1 16 characters DP16_1 Display if DP16 logical 0 16 characters DP16_0 Reclosing Relay Labels See Functions Unique to the Front Panel Interface in Section 11 Reclosing Relay Last Shot Label 14 char 79LL Reclosing Relay Shot Counter Label 14 char 79SL ...

Page 649: ... Settings See Below Time out 0 30 minutes T_OUT DTA Meter Format Y N DTA Send Auto Messages to Port Y N AUTO Enable Hardware Handshaking Y N MBT Refer to Appendix I for details on setting MBT RTSCTS Fast Operate Enable Y N FASTOP Other Port Settings Set T_OUT to the number of minutes of serial port inactivity for an automatic log out Set T_OUT 0 for no port time out Set DTA Y to allow an SEL DTA o...

Page 650: ...ve clock edge detect R Rising F Falling RC422X EIA 422 transmit clock edge detect R Rising F Falling TC422X If CHANX type is not EIA 422 Timing source I Internal E External TIMRX 87L Channel Y Configuration Settings Channel Y address check Y N EADDCY If EADDCY Y Channel Y transmit address 1 16 TA_Y Channel Y receive address 1 16 RA_Y Continuous dropout alarm 1 1000 seconds RBADYP Packets lost in l...

Page 651: ...tion D 1 Message Lists D 1 Binary Message List D 1 ASCII Configuration Message List D 2 Message Definitions D 2 A5C0 Relay Definition Block D 2 A5C1 Fast Meter Configuration Block D 3 A5D1 Fast Meter Data Block D 5 A5C2 A5C3 Demand Peak Demand Fast Meter Configuration Messages D 5 A5D2 A5D3 Demand Peak Demand Fast Meter Message D 7 A5B9 Fast Meter Status Acknowledge Message D 8 A5CE Fast Operate C...

Page 652: ...ent Elements F 1 Other Negative Sequence Overcurrent Element References F 2 APPENDIX G SETTING SELOGIC CONTROL EQUATIONS G 1 Relay Word Bits G 1 Relay Word Bit Operation Example Phase Time Overcurrent Element 51PT G 1 Other Relay Word Bits G 3 SELOGIC Control Equations G 3 SELOGIC Control Equation Operators G 3 All SELOGIC Control Equations Must Be Set G 7 SELOGIC Control Equation Limitations G 8 ...

Page 653: ...ulating IAR IAL for Phase Faults J 2 Calculating I2R I2L for Ground Faults J 3 Summary J 4 Line Charging Current Calculation Examples J 5 Example 1 500 kV OH Transmission Line 100 Miles of Single 1113 MCM Conductor J 5 Example 2 15 kV Underground Cable 5 Miles J 5 Ground Fault Resistance Coverage With 87L2P 0 5 A J 6 APPENDIX K SEL 5030 ACSELERATOR K 1 Introduction K 1 ACSELERATOR System Requireme...

Page 654: ...51QT F 2 Figure G 1 Result of Rising Edge Operators on Individual Elements in Setting ER G 6 Figure G 2 Result of Falling Edge Operator on a Deasserting Out of Step Blocking Element G 7 Figure J 1 Example System Single Line J 1 Figure J 2 Sequence Connection Diagram for an Internal Three Phase Fault J 1 Figure J 3 Sequence Connection Diagram for an A Phase Ground Fault J 4 ...

Page 655: ...e EIA 422 clock detection SEL 311L R101 V0 Z001001 D20010717 This firmware differs from the original as follows Correct unused CT scaling issue SEL 311L R100 V0 Z001001 D20010625 Original Version SEL 311L standard features To find the firmware revision number in your relay view the status report using the serial port STATUS STA command or the front panel STATUS pushbutton The status report display...

Page 656: ......

Page 657: ...toconfigured for the port connected to a relay that has been firmware upgraded Failure to do so may cause automatic data collection failure if the communication processor s power is cycled REQUIRED EQUIPMENT Personal computer Terminal emulation software that supports XMODEM CRC protocol e g CROSSTALK Microsoft Windows Terminal and HyperTerminal Procomm Plus Relay Gold or SmartCOM Serial communicat...

Page 658: ...derscore D ENTER to start the SELBOOT program 6 Type Y ENTER to the Disable relay to send or receive firmware Y N prompt and Y ENTER to the Are you sure Y N prompt The relay will send Relay Disabled and will then send the SELBOOT prompt after a few seconds Note SELBOOT does not echo nonalphabetic characters as the first character of a line This may make it appear that the relay is not functioning ...

Page 659: ... happens connect to the relay at 2400 baud and type BAUD 38400 at the SELboot prompt The firmware receive can be started again at Step 8 The file transfer takes approximately 9 minutes at 38 400 baud using the 1k XMODEM protocol After the transfer completes the relay will reboot and return to Access Level 0 The following screen capture shows the entire process L_D ENTER Disable relay to send or re...

Page 660: ...f supplied c Enter Access Level 2 by issuing the ACC and 2AC commands the factory default passwords will be in effect OTTER for level 1 TAIL for level 2 d Restore the original settings as necessary using the SEL 5010 Settings Assistant or with each of the following commands SET G SET 1 SET L 1 SET 2 SET L 2 SET 3 SET L 3 SET 4 SET L 4 SET 5 SET L 5 SET 6 SET L 6 SET P 1 SET P 2 SET P 3 SET P F SET...

Page 661: ...rrent and voltage signals to the relay Issue the MET command verify that the current and voltage signals are correct Issue the Trigger TRI and Event EVE commands Verify that the current and voltage signals are correct in the event report The relay is now ready for your commissioning procedure ...

Page 662: ......

Page 663: ...lt is 01 SETTLE Time in seconds that transmission is delayed after the request to send RTS line asserts This delay accommodates transmitters with a slow rise time OPERATION 1 The relay ignores all input from this port until it detects the prefix character and the two byte address 2 Upon receipt of the prefix and address the relay enables echo and message transmission 3 Wait until you receive a pro...

Page 664: ......

Page 665: ...e connected to the other end of the link requires software that uses the separate data streams to exploit this feature The binary commands and ASCII commands can also be accessed by a device that does not interleave the data streams SEL Application Guide AG95 10 Configuration and Fast Meter Messages is a comprehensive description of the SEL binary messages Below is a description of the messages pr...

Page 666: ...04 Support SEL LMD DNP 3 00 and R6 SEL protocols 03 Support Fast Meter fast demand and fast peak 03 Status flag for Warn Fail Group or Settings change A5C1 Fast Meter configuration A5D1 Fast Meter message A5C2 Fast demand configuration A5D2 Fast demand message A5C3 Fast peak configuration A5D3 Fast peak message 0004 Settings change bit A5C100000000 Reconfigure Fast Meter on settings change 0004 Se...

Page 667: ...channel name IB 01 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 494300000000 Analog channel name IC 01 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 495000000000 Analog channel name IP 01 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 564100000000 Analog channel name VA 01 ...

Page 668: ...sage 494159000000 Analog channel name IAY 01 Analog channel type FLOAT FF Scale factor type 0000 Scale factor offset in Fast Meter message 494259000000 Analog channel name IBY 01 Analog channel type FLOAT FF Scale factor type 0000 Scale factor offset in Fast Meter message 494359000000 Analog channel name ICY 01 Analog channel type FLOAT FF Scale factor type 0000 Scale factor offset in Fast Meter m...

Page 669: ... in 4 byte IEEE FPS 8 bytes Time stamp 68 bytes 59 Digital banks TAR0 TAR68 1 byte Reserved checksum 1 byte checksum of all preceding bytes A5C2 A5C3 Demand Peak Demand Fast Meter Configuration Messages In response to the A5C2 or A5C3 request the relay sends the following block Data Description A5C2 or A5C3 Command Demand A5C2 or Peak Demand A5C3 E4 Length 01 of status flag bytes 00 Scale factors ...

Page 670: ...er message Hex 50422B000000 Analog channel name PB 02 Analog channel type Double FF Scale factor type 0000 Scale factor offset in Fast Meter message Hex 50432B000000 Analog channel name PC 02 Analog channel type Double FF Scale factor type 0000 Scale factor offset in Fast Meter message Hex 50332B000000 Analog channel name P3 02 Analog channel type Double FF Scale factor type 0000 Scale factor offs...

Page 671: ...tor type 0000 Scale factor offset in Fast Meter message Hex 51422D000000 Analog channel name QB 02 Analog channel type Double FF Scale factor type 0000 Scale factor offset in Fast Meter message Hex 51432D000000 Analog channel name QC 02 Analog channel type Double FF Scale factor type 0000 Scale factor offset in Fast Meter message Hex 51332D000000 Analog channel name Q3 02 Analog channel type Doubl...

Page 672: ...e breaker 1 00 Operate code clear remote bit RB1 20 Operate code set remote bit RB1 40 Operate code pulse remote bit RB1 01 Operate code clear remote bit RB2 21 Operate code set remote bit RB2 41 Operate code pulse remote bit RB2 02 Operate code clear remote bit RB3 22 Operate code set remote bit RB3 42 Operate code pulse remote bit RB3 03 Operate code clear remote bit RB4 23 Operate code set remo...

Page 673: ... RB16 2F Operate code set remote bit RB16 4F Operate code pulse remote bit RB16 00 Reserved checksum 1 byte checksum of all preceding bytes A5E0 Fast Operate Remote Bit Control The external device sends the following message to perform a remote bit operation Data Description A5E0 Command 06 Length 1 byte Operate code 00 0F clear remote bit RB1 RB16 20 2F set remote bit RB1 RB16 40 4F pulse remote ...

Page 674: ...206 For example to pulse output contact OUT104 for 30 cycles with Remote Bit RB4 and SELOGIC control equation timer SV4 issue the following relay settings via the SET L command SV4 RB4 SV4 input is RB4 OUT104 SV4T route SV4 timer output to OUT104 via the SET command SV4PU 0 SV4 pickup time 0 SV4DO 30 SV4 dropout time is 30 cycles To pulse the contact send the A5E006430DDB command to the relay A5E3...

Page 675: ...ata Description A5ED Command 06 Message Length always 6 00 Operate Code e g 00 for target reset TAR R 01 Operate Validation 4 Operate Code 1 xx Checksum ID Message In response to the ID command the relay sends the firmware ID and relay TID setting as described below STX FID SEL 311L Rrrr V0 Zzzzzzz Dyyyymmdd aaaa CR LF CID cccc aaaa CR LF DEVID TID SETTING aaaa CR LF DEVCODE 50 aaaa CR LF PARTNO P...

Page 676: ...SV4T 0BAC CR SV5 SV6 SV7 SV8 SV5T SV6T SV7T SV8T 0BCC CR SV9 SV10 SV11 SV12 SV9T SV10T SV11T SV12T 0CD6 CR SV13 SV14 SV15 SV16 SV13T SV14T SV15T SV16T 0D44 CR MAB1 MBC1 MCA1 MAB2 MBC2 MCA2 CVTBL SOTFT 0C9A CR MAG1 MBG1 MCG1 MAG2 MBG2 MCG2 DCHI DCLO 0BE7 CR BCW BCWA BCWB BCWC FIDEN FSA FSB FSC 0BAD CR SG1 SG2 SG3 SG4 SG5 SG6 OC CC 0969 CR CLOSE CF TRGTR 52A 3PO SOTFE VPOLV 50L 0C55 CR PDEM GDEM QDE...

Page 677: ... OUT203 OUT204 OUT205 OUT206 87LPE DD 0EA9 CR FTABC FTAG FTBG FTCG FTAB FTBC FTCA FTSE 0CD5 CR 87L 87LA 87LB 87LC 87L2 87LG CHYAL CHXAL 0C02 CR 87LOPA 87LAE R87LA CTAA PQ87LA TRIP87 BXYZ2 BXYZG 0F21 CR 87LOPB 87LBE R87LB CTAB PQ87LB BXYZA BXYZB BXYZC 0F12 CR 87LOPC 87LCE R87LC CTAC PQ87LC T51PT T50P T50PT 0E2E CR 87LOP2 87L2E R87L2 B87L2 PQ87L2 T51QT T50Q T50QT 0E01 CR 87LOPG 87LGE R87LG B87LG PQ8...

Page 678: ...S command is available at Access Level 1 The relay responds to the SNS command with the name string in the SER settings The name string starts with SER1 followed by SER2 and SER3 For example If SER1 50G1 OUT101 SER2 67P1T SER3 OUT102 52A the name string will be 50G1 OUT101 67P1T OUT102 52A If there are more than eight settings in SER the SNS message will have several rows Each row will have eight ...

Page 679: ...configuration message provides the format information in all the compressed ASCII commands This facilitates an external computer extracting data using other compressed ASCII commands To obtain the configuration message for the compressed ASCII commands available in an SEL relay type CAS CR The relay sends STX CAS n yyyy CR COMMAND 1 ll yyyy CR H xxxxx xxxxx xxxxx yyyy CR D ddd ddd ddd ddd ddd yyyy...

Page 680: ...point data mS String of maximum m characters e g 10S for a 10 character string yyyy is the 4 byte hex ASCII representation of the checksum A compressed ASCII command may require multiple header and data configuration lines If a compressed ASCII request is made for data that are not available e g the history buffer is empty or invalid event request the relay responds with the following message STX ...

Page 681: ... CR 1H FID 022C CR 1D 45S 0211 CR 7H MONTH DAY YEAR HOUR MIN SEC MSEC 0BB9 CR 1D I I I I I I I 05F4 CR 23H FREQ SAM CYC_A SAM CYC_D NUM_OF_CYC EVENT LOCATION SHOT TARGETS IA IB IC IP IG 3I2 IAL IBL ICL IAX IBX ICX IAY IBY ICY 2723 CR 1D F I I I 6S F I 22S I I I I I I I I I I I I I I I 122C CR 26H IA IB IC IP IG VA kV VB kV VC kV VS kV V1MEM FREQ VDC IAL IBL ICL IAX IBX ICX IAY IBY ICY IAT IBT ICT ...

Page 682: ..._DEG ICX ICX_DEG 3I2X 3I2X_DEG IAY IAY_DEG IBY IBY_DEG ICY ICY_DEG 3I2Y 3I2Y_DEG 2F94 CR 1D I F I F I F I F I F I F I F I F I F I F I F I F 1219 CR 18H IA_PF IA_DEG_PF IB_PF IB_DEG_PF IC_PF IC_DEG_PF IP_PF IP_DEG_PF IG_PF IG_DEG_PF 3I2_PF 3I2_DEG_PF VA_PF VA_DEG_PF VB_PF VB_DEG_PF VC_PF VC_DEG_PF 2F62 CR 1D I F I F I F I F I F I F F F F F F F 0DC3 CR 18H IA IA_DEG IB IB_DEG IC IC_DEG IP IP_DEG IG ...

Page 683: ...xxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR ETX where xxxx are the data values corresponding to the first line labels and yyyy is the 4 byte hex ASCII representation of the checksum CHISTORY COMMAND SEL 311L Display history data in compressed ASCII format by sending CHI CR The relay sends STX FID 0143 CR Relay FID string yyyy CR REC_NUM MONTH DAY YEAR HOUR MIN SEC MSEC EVENT LOCATION CURR FREQ GROUP...

Page 684: ...string yyyy CR MONTH DAY YEAR HOUR MIN SEC MSEC 0ACA CR xxxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR FREQ SAM CYC_A SAM CYC_D NUM_OF_CYC EVENT LOCATION SHOT TARGETS IA IB IC IP IG 3I2 IAL IBL ICL IAX IBX ICX IAY IBY ICY 2606 CR xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR IA IB IC IP IG VA kV VB kV VC kV VS kV V1MEM FREQ V...

Page 685: ...11 RB12 RB13 RB14 RB15 RB16 LT1 LT2 LT3 LT4 LT5 LT6 LT7 LT8 LT9 LT10 LT11 LT12 LT13 LT14 LT15 LT16 SV1 SV2 SV3 SV4 SV1T SV2T SV3T SV4T SV5 SV6 SV7 SV8 SV5T SV6T SV7T SV8T SV9 SV10 SV11 SV12 SV9T SV10T SV11T SV12T SV13 SV14 SV15 SV16 SV13T SV14T SV15T SV16T MAB1 MBC1 MCA1 MAB2 MBC2 MCA2 CVTBL SOTFT MAG1 MBG1 MCG1 MAG2 MBG2 MCG2 DCHI DCLO BCW BCWA BCWB BCWC FIDEN FSA FSB FSC SG1 SG2 SG3 SG4 SG5 SG6 ...

Page 686: ...e above format A typical HEX ASCII Relay Word is shown below 10000004924900000000000000000000000000000200000000000000000000000024000080 0000C0000100000000000000000000000000 Each bit in the HEX ASCII Relay Word reflects the status of a Relay Word bit The order of the labels in the Names of elements in the relay word separated by spaces field matches the order of the HEX ASCII Relay Word In the exam...

Page 687: ...IBY_DEG ICY ICY_DEG 3I2Y 3I2Y_DEG 2E76 CR xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx yyyy CR IA_PF IA_DEG_PF IB_PF IB_DEG_PF IC_PF IC_DEG_PF IP_PF IP_DEG_PF IG_PF IG_DEG_PF 3I2_PF 3I2_DEG_PF VA_PF VA_DEG_PF VB_PF VB_DEG_PF VC_PF VC_DEG_PF 2E41 CR xxxx xxxx xx xxxx xxxx xx xxxx xxxx xx x...

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Page 689: ... sequence definite time overcurrent elements and a following coordination example The coordination example uses time overcurrent elements but the same principles can be applied to definite time overcurrent elements SETTING NEGATIVE SEQUENCE TIME OVERCURRENT ELEMENTS Negative sequence time overcurrent element 51QT should not be set to trip directly when it is set with a low time dial setting 51QTD ...

Page 690: ...is the source of the coordination guidelines and example given in this appendix The paper also contains analyses of system unbalances and faults and the negative sequence current generated by such conditions A F Elneweihi Useful Applications for Negative Sequence Overcurrent Relaying 22nd Annual Western Protective Relay Conference Spokane Washington October 24 26 1995 This conference paper gives m...

Page 691: ...ing picked up timed out or otherwise asserted Logical 0 represents an element being dropped out or otherwise deasserted Complete listings of Relay Word bits and their descriptions are referenced in Tables 9 3 and 9 4 in Section 9 Setting the Relay Relay Word Bit Operation Example Phase Time Overcurrent Element 51PT As an example of protection element operation via the logic output of Relay Word bi...

Page 692: ...logical 1 Phase Time Overcurrent Element 51PT Reset Indication If phase time overcurrent element 51PT is not fully reset Relay Word bit 51PR is in the following state 51PR 0 logical 0 If phase time overcurrent element is fully reset Relay Word bit 51PR is in the following state 51PR 1 logical 1 If phase time overcurrent element 51PT is not fully reset the element is either Timing on its curve Alre...

Page 693: ...ic inputs shown in the various figures in Section 3 through Section 8 are SELOGIC control equations labeled SELOGIC Settings in most of the Figures SELOGIC control equations are set with combinations of Relay Word bits to accomplish such functions as tripping circuit breakers assigning functions to optoisolated inputs operating output contacts torque controlling overcurrent elements switching acti...

Page 694: ... setting is labeled 52A See Optoisolated Inputs in Section 7 Inputs Outputs Timers and Other Control Logic and Close Logic in Section 6 Close and Reclose Logic for more information on SELOGIC control equation circuit breaker status setting 52A When a circuit breaker is closed the 52a circuit breaker auxiliary contact is closed When a circuit breaker is open the 52a contact is open The opposite is ...

Page 695: ...ent pickup indication Relay Word bits deassert ULTR 50L 51G NOT 50L 51G As stated previously the logic within the parentheses is performed first In this example the states of Relay Word bits 50L and 51G are ORed together Then the NOT operator is applied to the logic resultant from the parentheses If either one of 50L or 51G is still asserted e g 51G 1 logical 1 the unlatch condition is not true UL...

Page 696: ... example allow setting ER to see each transition individually Suppose a ground fault occurs and a breaker failure condition finally results Figure G 1 demonstrates the action of the rising edge operator on the individual elements in setting ER Figure G 1 Result of Rising Edge Operators on Individual Elements in Setting ER Note in Figure G 1 that setting ER sees three separate rising edges due to t...

Page 697: ... of a Relay Word bit sees this logical 1 to logical 0 transition as a falling edge and asserts to logical 1 for one processing interval For example suppose the SELOGIC control equation event report generation setting is set with the detection of the falling edge of an out of step block element ER OSB This allows recovery from a power swing condition to be observed Figure G 2 demonstrates the actio...

Page 698: ...s In the factory settings included in a standard shipment of a SEL 311L Relay these are all set directly to logical 1 See these factory settings in SHO Command Show View Settings in Section 10 Line Current Differential Communications and Serial Port Communications and Commands If one of these torque control settings is set directly to logical 1 e g 67QTC 1 set directly to logical 1 then the corres...

Page 699: ...OGIC control equation settings changes have been made and the settings are saved the SEL 311L Relay responds with the following message xxx Elements and yy Edges remain available indicating that xxx Relay Word bits can still be used and yy rising or falling edge operators can still be applied in the SELOGIC control equations for the particular settings group PROCESSING ORDER AND PROCESSING INTERVA...

Page 700: ......

Page 701: ...scaling 0 3 decimal places 1 STIMEO Select operate time out 0 30 sec 1 0 DRETRY Data link retries 0 15 3 DTIMEO Data link time out 0 5 sec 1 MINDLY Minimum time from DCD to Tx 0 1 sec 0 05 MAXDLY Maximum time from DCD to Tx 0 1 sec 0 10 PREDLY Settle time from RTS on to Tx OFF 0 30 sec 0 PSTDLY Settle time after Tx to RTS off 0 30 sec 0 ANADB Analog reporting dead band 0 32767 counts 100 UNSOL Ena...

Page 702: ...ata link time out should be The noisier the communications channel the more likely a message will be corrupted Thus the number of retries should be set higher on noisy channels Set the data link time out long enough to allow for the worst case response of the master plus transmission time When the SEL 311L Relay decides to transmit on the DNP link it has to wait if the physical connection is in us...

Page 703: ...pecified in the DNP 3 00 Subset Definitions document DNP 3 00 DEVICE PROFILE DOCUMENT This document must be accompanied by a table having the following headings Object Group Request Function Codes Response Function Codes Object Variation Request Qualifiers Response Qualifiers Object Name optional Vendor Name Schweitzer Engineering Laboratories Inc Device Name SEL 311L Highest DNP Level Supported F...

Page 704: ...l Response þ None Fixed at Variable Configurable Others Attach explanation if Variable or Configurable was checked for any timeout Sends Executes Control Operations WRITE Binary Outputs Never þ Always Sometimes Configurable SELECT OPERATE Never þ Always Sometimes Configurable DIRECT OPERATE Never þ Always Sometimes Configurable DIRECT OPERATE NO ACK Never þ Always Sometimes Configurable Count 1 þ ...

Page 705: ...When Status Flags Change No other options are permitted Default Counter Object Variation No Counters Reported Configurable attach explanation þ Default object 20 Default variation 6 Point by point list attached Counters Roll Over at No Counters Reported Configurable attach explanation þ 16 Bits 32 Bits Other Value Point by point list attached Sends Multi Fragment Responses Yes þ No In all cases wi...

Page 706: ...4 16 Bit Delta Counter 20 5 32 Bit Binary Counter without Flag 1 0 1 6 7 8 129 0 1 7 8 20 6 16 Bit Binary Counter without Flag 1 0 1 6 7 8 129 0 1 7 8 20 7 32 Bit Delta Counter without Flag 20 8 16 Bit Delta Counter without Flag 21 0 Frozen Counter All Variations 21 1 32 Bit Frozen Counter 21 2 16 Bit Frozen Counter 21 3 32 Bit Frozen Delta Counter 21 4 16 Bit Frozen Delta Counter 21 5 32 Bit Froz...

Page 707: ... Counter Event with Time 30 0 Analog Input All Variations 1 0 1 6 7 8 30 1 32 Bit Analog Input 1 0 1 6 7 8 129 0 1 7 8 30 2 16 Bit Analog Input 1 0 1 6 7 8 129 0 1 7 8 30 3 32 Bit Analog Input without Flag 1 0 1 6 7 8 129 0 1 7 8 30 4 16 Bit Analog Input without Flag 1 0 1 6 7 8 129 0 1 7 8 31 0 Frozen Analog Input All Variations 31 1 32 Bit Frozen Analog Input 31 2 16 Bit Frozen Analog Input 31 3...

Page 708: ...0 129 07 quantity 1 50 2 Time and Date with Interval 51 0 Time and Date CTO All Variations 51 1 Time and Date CTO 51 2 Unsynchronized Time and Date CTO 07 quantity 1 52 0 Time Delay All Variations 52 1 Time Delay Coarse 52 2 Time Delay Fine 129 07 quantity 1 60 0 All Classes of Data 1 20 21 6 60 1 Class 0 Data 1 6 60 2 Class 1 Data 1 20 21 6 7 8 60 3 Class 2 Data 1 20 21 6 7 8 60 4 Class 3 Data 1 ...

Page 709: ...215 is A 1208 is 87CHFAIL 1207 is EN and 1200 is RCLO 01 02 1216 1219 Power factor leading for A B C and 3 phase 01 02 1220 Relay Disabled 01 02 1221 Relay diagnostic failure 01 02 1222 Relay diagnostic warning 01 02 1223 New relay event available 01 02 1224 Settings change or relay restart 10 12 00 15 Remote bits RB1 RB16 10 12 16 Pulse Open command OC 10 12 17 Pulse Close command CC 10 12 18 Res...

Page 710: ...32 28 31 MW A B C and 3 phase 30 32 32 35 MVAR A B C and 3 phase 30 32 36 39 Power factor A B C and 3 phase 30 32 40 Frequency 30 32 41 VDC 30 32 42 43 A phase MWhr in and out 30 32 44 45 B phase MWhr in and out 30 32 46 47 C phase MWhr in and out 30 32 48 49 3 phase MWhr in and out 30 32 50 51 A phase MVARhr in and out 30 32 52 53 B phase MVARhr in and out 30 32 54 55 C phase MVARhr in and out 30...

Page 711: ...15 IBX magnitude and angle 30 32 116 117 ICX magnitude and angle 30 32 118 119 3I0X magnitude and angle 30 32 120 121 I1X magnitude and angle 30 32 122 123 3I2X magnitude and angle 30 32 124 125 IAY magnitude and angle 30 32 126 127 IBY magnitude and angle 30 32 128 129 ICY magnitude and angle 30 32 130 131 3I0Y magnitude and angle 30 32 132 133 I1Y magnitude and angle 30 32 134 135 3I2Y magnitude...

Page 712: ...ed by the preceding table The values are reported in primary units Analog inputs 28 35 42 57 63 78 84 102 and 104 are further scaled according to the DECPLM setting e g if DECPLM is 3 then the value is multiplied by 1000 Analog inputs 58 62 79 83 and the even numbered points in 0 7 16 21 and 112 146 current magnitudes are scaled according to the DECPLA setting The even numbered points in 8 15 and ...

Page 713: ... in some of the pulse commands being ignored and returning an already active status Analog Outputs objects 40 and 41 are supported as defined by the preceding table Flags returned with object 40 responses are always set to 0 The Control Status field of object 41 requests is ignored If the value written to index 0 is outside of the range 1 through 6 the relay will not accept the value and will retu...

Page 714: ... If the map is determined to be corrupted DNP will respond to all master data requests with an unknown point error If the DNP command is issued with an A or B parameter at level 2 or greater the relay requests that the user enter indices for the corresponding list where a parameter of A specifies the Analog list and B specifies the Binary list The relay accepts lines of indices until a line withou...

Page 715: ...onds 0 0 30 0 STIMEO Number of data link retries 0 for no confirm 1 15 DRETRY Data Link Time out interval seconds 0 5 DTIMEO Minimum Delay from DCD to transmission seconds 0 00 1 00 MINDLY Maximum Delay from DCD to transmission seconds 0 00 1 00 MAXDLY Transmission delay from RTS assertion seconds OFF 0 00 30 00 PREDLY Post transmit RTS deassertion delay seconds 0 00 30 00 PSTDLY Analog reporting ...

Page 716: ......

Page 717: ...RRORED BITS device Otherwise the relay will appear to be locked up Configure the port first then connect the device OPERATION Message Transmission All messages are transmitted without idle bits between characters Idle bits are allowed between messages At 4800 baud one message is transmitted each 1 2 power system cycle At 9600 baud one message is transmitted each 1 4 power system cycle At 19200 and...

Page 718: ...to two will again delay a bit by about 1 2 cycle However in that same example a security counter set to two on the SEL 311L Relay will delay a bit by 1 4 cycle because the SEL 311L Relay is receiving new MIRRORED BITS messages each 1 8 cycle from the SEL 321 Synchronization When a node detects a communications error it deasserts ROKx and transmits an attention message which includes its TX_ID sett...

Page 719: ...channel is presently down the COMM record will only show the initial cause but the COMM summary will display the present cause of failure When the duration of an outage exceeds a user settable threshold the relay will assert a user accessible flag hereafter called RBADx Note The user will typically combine RBADx with other alarm conditions using SELOGIC control equations When channel unavailabilit...

Page 720: ...1L 38400 1 message per 1 8 cycle 1 message per 1 4 cycle 19200 1 message per 1 8 cycle 1 message per 1 4 cycle 9600 1 message per 1 4 cycle 1 message per 1 4 cycle 4800 1 message per 1 2 cycle 1 message per 1 2 cycle enable hardware handshaking Y N MBT RTSCTS N Use the MBT option if you are using a Pulsar MBT 9600 baud modem With this option set the relay will transmit a message every 1 2 power sy...

Page 721: ...if an error condition is detected The setting is a mask of 1s 0s and or Xs for RMB1A RMB8A where X represents the most recently received valid value Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB1PU 1 Mirrored Bits RMB_ Debounce DO msgs 1 8 RMB1DO 1 Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB2PU 1 Mirrored Bits RMB_ Debounce DO msgs 1 8 RMB2DO 1 Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB3PU 1 Mirror...

Page 722: ......

Page 723: ...L Relay 2 Z1R I1S I1L I1R M311L143 Z1S Source S Positive Sequence Impedance Z1R Source R Positive Sequence Impedance Z1L Line Positive Sequence Impedance m Per unit distance from Breaker 1 BKR 1 I1S Positive Sequence current measured by Relay 1 local relay current I1L for our example I1R Positive Sequence current measured by Relay 2 remote relay current I1R for our example Figure J 2 Sequence Conn...

Page 724: ... Ω mi 8 0 Ω primary total Source S and R Impedance ZLINE Current Transformer Ratio 1200 5 240 1 Increasing δ greater than 10 causes the secondary line current to exceed 6 A In actual practice we expect the source impedances to be much lower From this we conclude that 10 is a reasonable maximum value for δ 2 If the system is non homogeneous this too can create an angle difference between I1R and I1...

Page 725: ...of local and remote source voltages This means that the negative sequence ratio is not affected by load flow magnitude Because the phase negative and zero sequence 87L elements all use 87LANG to establish the restrain characteristic angle the limiting case is that set by the phase differential elements Any increase in Alpha plane coverage caused by ER 0 ES δ serves to increase the security of the ...

Page 726: ... Network 0 Zero Sequence Network Figure J 3 Sequence Connection Diagram for an A Phase Ground Fault Summary System non homogeneity and non zero load angle can add to create a 20 angular difference between IAR and IAL Continuing with our worst case scenario for setting 87LANG we must consider the additional sources of angle errors from CT saturation 40 and communication channel asymmetry 22 5 The s...

Page 727: ... 63 ft V 500 kV 3 I1CHARGING 137 6 A primary for a line length 100 miles V 2886 V I2CHARGING 1 37 A primary for the same line length with 1 unbalance If the current transformer ratio for this 500 kV application is 400 1 2000 5 the phase charging currents are 0 334 A secondary and the negative sequence charging current 3I2 is 0 01A secondary Make setting 87L2P 0 5 for excellent security and sensiti...

Page 728: ...ce charging current 3I2 is 0 03 A secondary Again make setting 87L2P 0 5 A for excellent security and sensitivity Ground Fault Resistance Coverage With 87L2P 0 5 A In both examples setting 87L2P 0 5 A secondary allows ground fault resistance coverage up to RF Ω 8 132 A 5 0 V 4 66 secondary2 2 Assumes load current less than 1 3 of nominal secondary current See Figure 3 8 for ground fault resistance...

Page 729: ...er and Control functions Create manage copy merge and read relay settings with a settings database manager This document gives instructions for installing the SEL 5030 ACSELERATOR A Quick Tour guide is available as part of the online help After installation the Quick Tour will show how to create a circuit breaker CB simulator The CB simulator is useful for testing and evaluation Note Like all SEL ...

Page 730: ...g command D SETUP substitute D with your PC s CD ROM drive letter 3 Follow the steps that appear on the screen The installation program will perform all the necessary steps to load the ACSELERATOR software onto your PC It is necessary to have the correct comctl32 dll file installed on your computer in order to see the toolbar buttons If you do not see the toolbar buttons run the 40ComUpd exe locat...

Page 731: ...sent R specifies raw unfiltered data defaults to 16 samples per cycle unless overridden by the Sx parameter Defaults to 16 cycles in length unless overridden with the Ly parameter C specifies 16 samples per cycle 15 cycle length CHIS Compressed history COM p L Show a long format communications summary report for all events on MIRRORED BITS or Differential Channel p COM p n Show a communications su...

Page 732: ...p n SHO L n Show SELOGIC control equation settings for Group n SHO G Show global settings SHO P n Show Port n settings SHO R Show Sequential Events Recorder SER settings SHO T Show text label settings STA Show relay self test status SUM Show newest event summary SUM A Acknowledge oldest even summary SUM N View oldest unacknowledged event report SUM N A Display or acknowledge event summary number N...

Page 733: ...back PAS Show existing Access Level 1 B and 2 passwords PAS 1 xxxxxx Change Access Level 1 password to xxxxxx PAS B xxxxxx Change Access Level B password to xxxxxx PAS 2 xxxxxx Change Access Level 2 password to xxxxxx SET n Change relay settings overcurrent reclosing timers etc for Group n SET L n Change SELOGIC control equation settings for Group n SET G Change global settings SET P n Change Port...

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