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3-22

Distance and Overcurrent Elements

Date Code 20011205

SEL-311A Instruction Manual

Torque Control Switch Open

If the Torque Control Switch in Figure 3.14 is open, maximum phase current, I

ABC

, cannot get

through to the pickup comparator (setting 51PP) and the curve timing/reset timing functions. For
example, suppose that the Torque Control Switch is closed, I

ABC

is:

I

ABC

> pickup setting 51PP

and the phase time-overcurrent element is timing or is timed out on its curve. If the Torque
Control Switch is then opened, I

ABC

effectively appears as a magnitude of zero (0) to the pickup

comparator:

I

ABC

= 0 A (effective)

<

pickup setting 51PP

resulting in Relay Word bit 51P deasserting to logical 0. I

ABC

also effectively appears as a

magnitude of zero (0) to the curve timing/reset timing functions, resulting in Relay Word bit
51PT also deasserting to logical 0. The phase time-overcurrent element then starts to time to
reset. Relay Word bit 51PR asserts to logical 1 when the phase time-overcurrent element is fully
reset.

Torque Control

Refer to Figure 3.14.

SEL

OGIC

control equation torque control settings (e.g., 51PTC) cannot be set directly to logical 0.

The following are settings examples of SEL

OGIC

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 time-overcurrent element

51PT is enabled and nondirectional.

Note

: All overcurrent element SEL

OGIC

control equation torque control settings

are set directly to logical 1 (e.g., 51PTC = 1) for the factory default
settings. See

SHO Command (Show/View Settings)

in

Section 10: Serial

Port Communications and Commands

for a list of the factory default

settings.

51PTC = IN105 Input IN105 deasserted (51PTC = IN105 = logical 0):

The Torque Control Switch opens and phase time-overcurrent element

51PT is defeated and nonoperational, regardless of any other setting.

Input IN105 asserted (51PTC = IN105 = logical 1):

The Torque Control Switch closes and phase time-overcurrent element

51PT is enabled and nondirectional.

51PTC = M2P

The 51P/51PT uses the Zone 2 mho phase distance element to provide forward
directional control.

Other SEL

OGIC

control equation torque control settings may be set to provide directional control.

See

Overcurrent Directional Control Provided by Torque Control Settings

at the end of

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Summary of Contents for SEL-311A

Page 1: ...SEL 311A 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: ... 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 pourrait être la s...

Page 3: ...mary of Revisions table 20011205 Reissued entire manual to reflect the following changes Updated Section 2 and Section 3 figure references throughout the manual Section 1 Added 220 V control input voltage specification to General Specifications Updated Terminal Connections information in General Specifications Section 2 Added Connectorized rear panel drawings Section 3 Added Ground and Phase Dista...

Page 4: ...SER Protocol 20010625 Appendix A Modified SEL 311 Relays to record consecutive event reports Modified the SUM command so that the Breaker Status reports the status from the last row of the event report 20010518 Appendix A Improved overflow supervision for distance elements 20010124 Reissued entire manual to reflect the following changes Added cautions warnings and dangers in English and French to ...

Page 5: ...MP in the Demand Meter Settings subsection Section 9 Settings Sheets Updated formatting Section 10 Added Warning statement to change default passwords to private passwords at relay installation Appendix G Updated first row of Table G 3 Correctly identify binary output point 23 in the Relay Summary Event Data subsection 20000911 New Manual Release ...

Page 6: ......

Page 7: ...TION 9 SETTING THE RELAY SECTION 10 SERIAL PORT COMMUNICATIONS AND COMMANDS SECTION 11 FRONT PANEL INTERFACE SECTION 12 STANDARD EVENT REPORTS AND SER SECTION 13 TESTING AND TROUBLESHOOTING SECTION 14 APPLICATION SETTINGS FOR SEL 2PG10 RELAYS SECTION 15 APPENDICES Appendix A Firmware Versions Appendix B Firmware Upgrade Instructions Appendix C SEL Distributed Port Switch Protocol Appendix D Config...

Page 8: ......

Page 9: ...ommunications Connections 1 6 Relay Specifications 1 8 General Specifications 1 8 Processing Specifications 1 10 Relay Element Settings Ranges and Accuracies 1 11 FIGURES Figure 1 1 SEL 311A Relay Transmission Line Protection with MIRRORED BITS 1 4 Figure 1 2 SEL 311A Relay Inputs Outputs and Communications 1 5 Figure 1 3 SEL 311A Relay Communications Connections Examples 1 6 Figure 1 4 SEL 311A R...

Page 10: ......

Page 11: ...ng the SEL 311A Relay application connections and the operation of circuit board jumpers Figure 2 2 through Figure 2 4 show the SEL 311A Relay front and rear panels Section 3 Distance and Overcurrent Elements describes the operation of Phase and ground distance elements phase mho and ground mho Instantaneous definite time overcurrent elements phase and residual ground Time overcurrent elements pha...

Page 12: ... Latch control switches latch bit outputs LT1 through LT16 Multiple setting groups six available Programmable timers timer outputs SV1T through SV16T Output contacts OUT101 through OUT107 and ALARM Rotating default displays and display points Section 8 Breaker Monitor and Metering Functions describes the operation of Breaker monitor Station dc monitor Demand and maximum minimum metering Section 9 ...

Page 13: ...maries Sequential events recorder SER report Section 13 Testing and Troubleshooting describes General testing philosophy methods and tools Relay self tests and troubleshooting Section 14 Application Settings for SEL 2PG10 Relays Conversion guide for the SEL 2PG10 relays Settings Sheets for the SEL 2PG10 relays Section 15 Appendices contains the following appendices Appendix A Firmware Versions App...

Page 14: ...ual APPLICATIONS SEL 311A SEL 311A DWG M311A001 MIRRORED BITSTM Figure 1 1 SEL 311A Relay Transmission Line Protection with MIRRORED BITS AC DC CONNECTIONS See General Specifications later in this section and Section 2 Installation for more information on hardware and connections ...

Page 15: ...ic terminal labels Section 14 describes how to easily set the SEL 311A to emulate the popular SEL 221 relays For installation in systems with drawings designed for SEL 311A Relays use the alphanumeric terminal labels See Figure 2 2 through Figure 2 4 for rear panel drawings Note Terminals 41 and 42 are not used in the SEL 311A Figure 1 2 SEL 311A Relay Inputs Outputs and Communications ...

Page 16: ... 311A Instruction Manual COMMUNICATIONS CONNECTIONS See Port Connector and Communications Cables in Section 10 Serial Port Communications and Commands for more communications connection information Figure 1 3 SEL 311A Relay Communications Connections Examples ...

Page 17: ... 311A Instruction Manual SEL 2800 SEL 2800 IN101 Relay SEL 2800 SEL 2800 SEL 2505 Transformer Alarms SEL 2800 DWG M311A004 SEL 2100 Protection Logic Processor SEL 311A Relay SEL 311A Relay Figure 1 4 SEL 311A Relay Communications Connections Examples Continued ...

Page 18: ... recommended Minimum temperature rating of 105 C AC Current Inputs 5 A nominal 15 A continuous linear to 100 A symmetrical 500 A for 1 second 1250 A for 1 cycle Burden 0 27 VA 5 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 connec...

Page 19: ...ely 5 mA of current 110 Vdc inputs draw approximately 8 mA of current All current ratings are at nominal input voltages Note 220 Vdc optoisolated inputs are not available in the Connectorized version of the relay Routine Dielectric Test Voltage Current inputs 2500 Vac for 10 s Power supply optoisolated inputs and output contacts 3000 Vdc for 10 s The following IEC 60255 5 Dielectric Tests 1977 are...

Page 20: ...e Environmental Cold IEC 60068 2 1 1990 Test Ad 16 hr 40 Dry Heat IEC 60068 2 2 1974 Test Bd 16 hr 85 Damp Heat Cyclic IEC 60068 2 30 1980 Test Db 55 C 6 cycles 95 humidity Object Penetration IEC 60529 1989 IP30 IP54 Vibration IEC 60255 21 1 1988 Class 1 IEC 60255 21 2 1988 Class 1 IEC 60255 21 3 1993 Class 2 Safety Impulse IEC 60255 5 1977 0 5 J 5000 V Certifications ISO Relay is designed and man...

Page 21: ...hase Distance Elements Zones 1 2 Impedance Reach Setting Range OFF 0 05 to 64 Ω sec 0 01 Ω steps 5 A nominal OFF 0 25 to 320 Ω sec 0 01 Ω steps 1 A nominal Minimum sensitivity is controlled by the pickup of the supervising phase to phase 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 s...

Page 22: ...p and reset time curves in Figure 3 11 and Figure 3 12 Instantaneous Definite Time Overcurrent Elements Pickup Range OFF 0 25 100 00 A 0 01 A steps 5 A nominal OFF 0 05 20 00 A 0 01 A steps 1 A nominal Steady State Pickup 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 Time Delay 0 00 16 000 00 cycles 0 25 cycle steps Timer Accuracy ...

Page 23: ...2 14 TABLES Table 2 1 Communication Cables to Connect the SEL 311A Relay to Other Devices 2 7 Table 2 2 Move Jumper JMP23 to Select Extra Alarm 2 12 Table 2 3 Password and Breaker Jumper Operation 2 13 Table 2 4 EIA 232 Serial Port Voltage Jumper Positions for Standard Relay Shipments 2 14 FIGURES Figure 2 1 SEL 311A Relay Dimensions and Panel Mount Cutout 2 1 Figure 2 2 SEL 311A Relay Front and R...

Page 24: ......

Page 25: ...Date Code 20011205 Installation 2 1 SEL 311A Instruction Manual SECTION 2 INSTALLATION RELAY MOUNTING Figure 2 1 SEL 311A Relay Dimensions and Panel Mount Cutout ...

Page 26: ...2 2 Installation Date Code 20011205 SEL 311A Instruction Manual FRONT AND REAR PANEL DIAGRAMS Figure 2 2 SEL 311A Relay Front and Rear Panel Drawings Horizontal ...

Page 27: ...Date Code 20011205 Installation 2 3 SEL 311A Instruction Manual Figure 2 3 SEL 311A Relay Front and Rear Panel Drawings Vertical ...

Page 28: ...2 4 Installation Date Code 20011205 SEL 311A Instruction Manual Figure 2 4 SEL 311A Relay Connectorized Rear Panel Drawing ...

Page 29: ...or power supply ratings The relay power supply rating is listed on the serial number sticker on the relay rear panel Output Contacts The SEL 311A Relay can be ordered with standard output contacts only Refer to General Specifications in Section 1 Introduction and Specifications for output contact ratings Standard output contacts are not polarity dependent Optoisolated Inputs The optoisolated input...

Page 30: ...see Table 10 1 also see following discussion on IRIG B time code input The pin definitions for all the ports are given on the relay rear panel and are detailed in Table 10 1 through Table 10 3 in Section 10 Serial Port Communications and Commands Refer to Table 2 1 for a list of cables available from SEL for various communication applications Refer to Section 10 Serial Port Communications and Comm...

Page 31: ...232 ports SEL 2100 C272A 2 SEL 2100 with IRIG C273A 2 3 SEL 2505 SEL 2800 A corresponding main board jumper must be installed to power the Telenetics Modem with 5 Vdc 0 5 A limit from the SEL 311A Relay See Figure 2 7 and Table 2 4 IRIG B Time Code Input The SEL 311A Relay accepts a demodulated IRIG B time signal to synchronize the relay internal clock with some external source A demodulated IRIG ...

Page 32: ...A RELAY AC DC CONNECTION DIAGRAMS FOR VARIOUS APPLICATIONS Current Channel IP does not need to be connected Channel IP provides current for current polarized directional elements Figure 2 5 SEL 311A Relay Provides Distance and Overcurrent Protection for a Transmission Line ...

Page 33: ... this example current Channel IP provides current polarization for a directional element used to control ground elements Figure 2 6 SEL 311A Relay Provides Distance and Overcurrent Protection for a Transmission Line Current Polarization Source Connected to Channel IP ...

Page 34: ...result in injury or death 4 Each circuit board corresponds to a row of rear panel terminal blocks or connectors and is affixed to a drawout tray The SEL 311A Relay has only a main board 5 Disconnect circuit board cables as necessary to allow the main board and drawout tray to be removed Ribbon cables can be removed by pushing the extraction ears away from the connector The 6 conductor power cable ...

Page 35: ...Date Code 20011205 Installation 2 11 SEL 311A Instruction Manual Figure 2 7 Jumper Connector and Major Component Locations on the SEL 311A Relay Main Board ...

Page 36: ...26 for examples of output contact operation for different output contact types Extra Alarm Output Contact Control Jumper All the SEL 311A Relays have dedicated alarm output contacts labeled ALARM see Figure 2 2 and Figure 2 3 Often more than one alarm output contact is needed for such applications as local or remote annunciation backup schemes etc Convert the output contact adjacent to the dedicat...

Page 37: ... JMP6 B ON in place Enable serial port commands OPEN CLOSE and PULSE2 These commands are disabled in a standard relay shipment OFF removed not in place Disable serial port commands OPEN CLOSE and PULSE2 These commands are disabled in a standard relay shipment 1 View or set the passwords with the PASSWORD command see Section 10 Serial Port Communications and Commands 2 The OPEN CLOSE and PULSE comm...

Page 38: ...AUTION There is danger of explosion if the battery is incorrectly replaced Replace only with Ray O Vac no BR2335 or equivalent 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 rat...

Page 39: ...ment Maximum Phase Logic Outputs 3 21 Table 3 5 Residual Ground Time Overcurrent Element Settings 3 24 FIGURES Figure 3 1 Positive Sequence Polarized Mho Element 3 3 Figure 3 2 Compensator Distance Phase to Phase Element Operation 3 4 Figure 3 3 Compensator Distance Three Phase Element Operation 3 5 Figure 3 4 Zone 1 Phase Distance Logic 3 7 Figure 3 5 Zone 2 Phase Distance Logic 3 8 Figure 3 6 Zo...

Page 40: ......

Page 41: ... concepts Sampled currents and voltages are represented in the relay as vectors by using the most recent sample as the real vector component and the sample taken one quarter cycle earlier as the imaginary vector component See Figures 12 3 and 12 4 in Chapter 12 Standard Event Reports and SER for a description of this process If vector V1 V1 Ð θ1 and vector V2 V2 Ð θ2 then V1 V2 conjugate V1 V2 V1 ...

Page 42: ...lation Positive torque restrains negative torque operates Z Replica line impedance at operating or balance point As mentioned previously a digital relay mho element tests the angle between a line drop compensated voltage and a polarizing reference voltage Figure 3 1 through Figure 3 3 show the operating voltages inside positive sequence polarized mho elements and compensator distance mho elements ...

Page 43: ... 0 Z I V I Zsource Test Angle cos q 0 Balance cos 90 0 I X I R Vmem Z I V Z I V I Zsource Test Angle cos q 0 Operate cos q 0 I X I R Vmem Z I V Z I V I Zsource Test Angle cos q 0 Forward External Fault Forward Fault at the Balance Point Forward Internal Fault M311B034 Figure 3 1 Positive Sequence Polarized Mho Element ...

Page 44: ...IAB V BC Z I BC Fault Near Balance Point VA VC VB VAB Z IAB V BC Z I BC Forward External Fault VA VC VB VAB Z IAB V BC Z I BC Internal Fault VA VC Test Angle q 180 sin q 0 Test Angle q 180 sin q 0 Note VA VB and VC are internal element voltages not system voltages Test Angle q 180 sin q 0 M311B035 Figure 3 2 Compensator Distance Phase to Phase Element Operation ...

Page 45: ...ized 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 a delta wye transformer The compensator ...

Page 46: ... in the E21P setting e g 2C is two zones of compensator distance relaying If EADV N and compensator distance elements are selected E21MG is set to N and hidden If EADV 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 2 Enable Setting E21P 1 2 1C 2C Setting range for Mho Phase Distance Eleme...

Page 47: ...te 1 mAB Z1P CVTBL VPOLV ILOP FSB FSA 32QF 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 ILOP IBC ICA See Note 2 ABC1 0 Calc See Note 2 PP1 0 Calc MPP1 CVTBL C in E21P Setting _ _ _ M1P MBC1 MCA1 Relay Word Bits MABC1...

Page 48: ...ompensator distance element calculations IAB 50PP2 Setting C in E21P Setting VPOLV ILOP IBC ICA See Note 2 ABC2 0 Calc See Note 2 PP2 0 Calc MPP2 _ _ _ C in E21P Setting MABC2 MPP2 Relay Word Bits Relay Word Bits Relay Word Bits unless noted 2 1 3 2 1 3 From Figure 4 14 From Figure 4 1 From Figure 4 15 Figure 3 5 Zone 2 Phase Distance Logic Ground Distance Elements The SEL 311A Relay has two indep...

Page 49: ... and 50L2 and 50GZ1 and50GZ2 Note If EADVS N level 2 fault detector is set at its minimum value and hidden 0 50 100 00 A secondary 0 01 A steps 5 A nominal 0 10 20 00 A 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 11 and Figure 3 12 ...

Page 50: ...SA CVTBL 3PO ILOP VPOLV Zone 1 A Phase Mho Ground Distance Logic B and C Phase Are Similar Note 1 mAG A Phase to Ground Distance Calculation Z1MG Zone 1 Distance Setting MAG1 MBG1 MCG1 Z1G Relay Word Bits Relay Word Bit Relay Word Bits unless noted 4 2 1 3 From Figure 4 12 From Figure 5 3 From Figure 4 2 From Figure 4 1 Figure 3 6 Zone 1 Mho Ground Distance Logic ...

Page 51: ...gure 4 12 From Figure 4 1 From Figure 5 3 Figure 3 7 Zone 2 Mho Ground Distance Logic Distance Element Operating Time Curves at Nominal Frequency Figure 3 8 shows operating times for the SEL 311A Relay distance elements The diagrams show operating times at each test point Operating times include output contact closure time For the distance element test a fault was applied at a location representin...

Page 52: ... 10 0 SIR 30 0 0 0 25 0 5 0 75 1 1 25 1 5 1 75 2 0 10 20 30 40 50 60 70 80 90 Fault Location in Percent of Set Reach Trip Time in Cycles SEL 311A Phase Mho Operating Times Phase to Phase Faults SIR 0 1 SIR 1 0 SIR 10 0 SIR 30 0 Figure 3 8 Ground and Phase Distance Speed Curves Additional Distance Element Supervision The SEL 311A uses Relay Word bit VPOLV for positive sequence memory supervision of...

Page 53: ...ase and ground distance elements both drive a common timer Common Timer Settings Z1D and Z2D Independent Phase Timer Settings Z1PD and Z2PD Independent Ground Timer Settings Z1GD and Z2GD Pickup Ranges OFF 0 00 16 000 00 cycles 0 25 cycle steps Pickup and dropout accuracy for all timers 0 25 cycle and 0 1 of setting Select independent zone timing by using relay words MnPT and ZnGT where n is the p...

Page 54: ...al Z1D 0 Z1PD 0 Z1GD 0 SUSPEND TIMING Z1T Z1G Zone 1 Delay Timer Logic M1PT Z1GT SUSPEND TIMING Z2T Z2G Zone 2 Delay Timer Logic M2PT Z2GT DWG M311A011a M1P M2P Z2D 0 Z2PD 0 Z2GD 0 4 2 1 3 From Figure 3 4 From Figure 3 5 From Figure 3 6 From Figure 3 7 Figure 3 9 Zone Timing Elements ...

Page 55: ...ing 67P1D 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 Transient Overreach 5 of setting Pickup Operation See the phase instantaneous definite time overcurrent element logic in Figure 3 10 The pickup ...

Page 56: ... IN105 logical 1 67P1 67P1T follows 50P1 67P1TC M2P The 67P1 67P1T uses the Zone 2 mho phase distance element to provide forward directional control Other SELOGIC control equation torque control settings may be set to provide directional control See Overcurrent Directional Control Provided by Torque Control Settings at the end of Section 4 Loss of Potential CCVT Transient Detection Load Encroachme...

Page 57: ... residual ground instantaneous definite time overcurrent element is available It is enabled with the E50G enable setting as shown in Figure 3 13 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 13 follow the explanation given for Figure 3 10 in the preceding Phase Instantane...

Page 58: ...tting range for pickup setting 50G1P OFF 0 25 100 00 A secondary 5 A nominal phase current inputs IA IB IC OFF 0 05 20 00 A secondary 1 A nominal phase current inputs IA IB IC Setting range for definite time setting 67G1D 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...

Page 59: ...aximum 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 electromechanical reset timing Y Enable elect...

Page 60: ... 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 14 are the Relay Word bits shown in Table 3 4 ...

Page 61: ...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 0 if IABC pickup setting 51PP 51PT 1 ...

Page 62: ...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 time overcurrent element 51PT is enabled and nondirectional Note All overcurrent element SELOGIC control e...

Page 63: ...nd 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 Curves in Section 9 Setting the Relay for reset curve equations Setting 51PRS N If reset timing setting 51PRS N element 51PT reset timing is a 1 cycle dropout If current IABC goes ab...

Page 64: ...GC 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 see note b...

Page 65: ...anual 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 ...

Page 66: ......

Page 67: ... 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 26 Overcurrent Directional Control Provided by Torque Control Settings 4 27 TABLES Table 4 1 Elements Controlled by Zone Level Directi...

Page 68: ...ure 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 General Logic Flow of Directional Control for Negative Sequence...

Page 69: ... Figure 4 1 From Figure 5 3 To Figure 3 4 through Figure 3 7 Figure 4 9 through Figure 4 11 Figure 4 14 and Figure 4 15 Figure 4 1 Loss of Potential Logic Inputs into the LOP logic are 3PO three pole open condition indicates circuit breaker open condition see Figure 5 3 V1 positive sequence voltage V secondary I1 positive sequence current A secondary V0 zero sequence voltage V secondary I0 zero se...

Page 70: ...ese voltage polarized directional elements are disabled also unless overridden by conditions explained in the following Setting ELOP Y discussion Setting ELOP Y Additionally if setting ELOP Y and a loss of potential condition occurs Relay Word bit LOP asserts to logical 1 overcurrent elements set direction forward are enabled see Figure 4 12 These direction forward overcurrent elements effectively...

Page 71: ...em Capacitive Voltage Transformer Transient Overreach Concerns and Solutions for Distance Relaying 0 1 5 DWG M311A015a CVTBL SIR 5 During Zone 1 Fault ECCVT Y SOTFE 3PO Distance Calculation Stable 2 1 From Figure 5 3 To Figure 3 4 and Figure 3 6 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...

Page 72: ...ent logic in Figure 4 3 Load is largely a balanced condition so apparent positive sequence impedance is a good load measure The 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 ZLOU...

Page 73: ...aximum Positive Load Angle Forward 90 to 90 NLAF Maximum Negative Load Angle Forward 90 to 90 PLAR Maximum Positive Load Angle Reverse 90 to 270 NLAR Maximum Negative Load Angle Reverse 90 to 270 Load Encroachment Setting Example Example system 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...

Page 74: ...To provide a margin for setting ZLF multiply by a factor of 0 9 ZLF 13 2 W secondary 0 9 11 90 W secondary For the maximum reverse load 230 2 400 500 2000 21 1 W secondary Again to provide a margin for setting ZLR ZLR 21 1 W secondary 0 9 19 00 W 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 26 Se...

Page 75: ...he ZLOUT area and stays outside the ZLIN area too resulting in ZLOAD ZLOUT ZLIN logical 0 logical 0 logical 0 Refer to Figure 3 14 in Section 3 Distance and Overcurrent 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 overcurr...

Page 76: ...oachment logic in the SEL 311A Relay DIRECTIONAL CONTROL FOR GROUND DISTANCE AND RESIDUAL GROUND OVERCURRENT ELEMENTS Setting E32 configures directional control for distance and overcurrent elements Setting E32 and other directional control settings are described in the following subsection Directional Control Settings Three directional elements are available to control the ground distance and res...

Page 77: ...esidual ground overcurrent elements Note in Figure 4 5 that setting ORDER enables the directional elements Setting ORDER can be set with any combination of Q V and I They have the following correspondence to the directional elements Q Negative sequence voltage polarized directional element V Zero sequence voltage polarized directional element I Channel IP current polarized directional element The ...

Page 78: ...h the directional element should be enabled to operate The ground distance and residual ground overcurrent elements set for directional control are then controlled by this directional element Directional Elements Refer to Figure 4 5 Figure 4 9 Figure 4 10 and Figure 4 11 The enable output of Best Choice Ground Directional logic in Figure 4 8 determines which directional element will run Additional...

Page 79: ...evels 1 and 2 residual ground overcurrent elements These direction forward overcurrent elements effectively become nondirectional and provide overcurrent protection during a loss of potential condition As detailed in Figure 4 9 and Figure 4 10 voltage based directional elements are disabled during a loss of potential condition Thus the overcurrent elements that are directionally controlled by thes...

Page 80: ...de 20011205 Load Encroachment and Directional Element Logic SEL 311A Instruction Manual From Figure 4 7 To Figure 4 14 To Figure 4 9 To Figure 4 8 Figure 4 6 Internal Enables 32QE and 32QGE Logic for Negative Sequence Voltage Polarized Directional Elements ...

Page 81: ...oad Encroachment and Directional Element Logic SEL 311A Instruction Manual To Figure 4 10 To Figure 4 6 To Figure 4 11 To Figure 4 8 Figure 4 7 Internal Enables 32VE and 32IE Logic for Zero Sequence Voltage Polarized and Channel IP Current Polarized Directional Elements ...

Page 82: ...Transient Detection Date Code 20011205 Load Encroachment and Directional Element Logic SEL 311A Instruction Manual From Figure 4 6 Figure 4 10 From Figure 4 7 Figure 4 11 Figure 4 9 Figure 4 8 Best Choice Ground Directional Logic ...

Page 83: ... Load Encroachment and Directional Element Logic SEL 311A Instruction Manual From Figure 4 6 From Figure 4 8 From Figure 4 1 To Figure 4 12 Figure 4 9 Negative Sequence Voltage Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements ...

Page 84: ...05 Load Encroachment and Directional Element Logic SEL 311A Instruction Manual From Figure 4 7 From Figure 4 8 From Figure 4 1 To Figure 4 12 Figure 4 10 Zero Sequence Voltage Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements ...

Page 85: ...7 From Figure 4 8 From Figure 4 1 To Figure 4 12 Figure 4 11 Channel IP Current Polarized Directional Element for Ground Distance and Residual Ground Overcurrent Elements From Figure 4 1 From Figure 4 11 From Figure 4 7 To Figure 3 6 Figure 3 7 From Figure 4 9 and Figure 3 13 From Figure 4 10 Figure 4 12 Ground Distance and Residual Ground Directional Logic ...

Page 86: ...quence 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 6 Figure 4 15 Figure 4 14 Figure 3 4 and Figure 3 5 Figu...

Page 87: ...ation on loss of potential 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 logic point Loss of Potent...

Page 88: ...11205 Load Encroachment and Directional Element Logic SEL 311A Instruction Manual From Figure 4 6 From Figure 3 4 and Figure 3 5 From Figure 4 1 Figure 4 14 Negative Sequence Voltage Polarized Directional Element for Phase Distance and Negative Sequence Elements ...

Page 89: ...nts is configured by making directional control enable setting E32 Setting E32 has setting choices Y All directional control settings made 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 50QFP a2...

Page 90: ...Setting Range Q Negative sequence voltage polarized directional element V Zero sequence voltage polarized directional element I Channel IP current polarized directional element Setting ORDER can be set with any combination of Q V and I The order in which these directional elements are listed determines the priority in which they operate to provide Best Choice Ground Directional logic control See F...

Page 91: ... Y setting Z2F negative sequence impedance is calculated by the user and entered by the user Z2F Set Automatically If configuration setting E32 AUTO setting Z2F negative sequence impedance is calculated automatically using the positive sequence line impedance magnitude setting Z1MAG as follows Z2F Z1MAG 2 Ω secondary 50QFP Forward Directional Negative Sequence Current Pickup Setting Range 0 25 5 0...

Page 92: ...itless Note the directional enable logic outputs in Figure 4 6 32QE enable for the negative sequence voltage polarized directional element that controls the phase distance elements 32QGE enable for the negative sequence voltage polarized directional element that controls the ground distance and residual ground overcurrent elements The k2 factor is applied to enable 32QGE The negative sequence curr...

Page 93: ... A nominal phase current inputs IA IB IC 0 05 1 00 A secondary 1 A nominal phase current inputs IA IB IC If preceding setting ORDER does not contain V or I no zero sequence voltage polarized or channel IP current polarized directional elements are enabled then setting 50GFP is not made or displayed The 50GFP setting 3I0 current value is the pickup for the forward fault detector 50GF of the zero se...

Page 94: ...e current inputs IA IB IC 320 00 to 320 00 Ω secondary 1 A nominal phase current inputs IA IB IC If preceding setting ORDER does not contain V no zero sequence voltage polarized directional element is enabled then setting Z0F is not made or displayed Z0F is used to calculate the Forward Threshold for the zero sequence voltage polarized directional elements see Figure 4 10 If configuration setting ...

Page 95: ...C control equation setting E32IV OVERCURRENT DIRECTIONAL CONTROL PROVIDED BY TORQUE CONTROL SETTINGS Directional and additional control for phase ground and negative sequence overcurrent elements is available with SELOGIC 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 ...

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Page 97: ...ogic 5 8 Close Bus Operated Switch Onto Fault Logic 5 9 Switch Onto Fault Logic Output SOTFE 5 9 Switch Onto Fault Trip Logic Trip Setting TRSOTF 5 9 Front Panel Target LEDs 5 10 Additional Target LED Information 5 10 Target Reset Lamp Test Front Panel Pushbutton 5 12 TABLES Table 5 1 SEL 311A Relay Front Panel Target LED Definitions 5 10 FIGURES Figure 5 1 Trip Logic 5 2 Figure 5 2 Minimum Trip D...

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Page 99: ... SEL relay TRSOTF Switch Onto Fault Trip Conditions Setting TRSOTF is supervised by the switch onto fault condition SOTFE See Switch Onto Fault SOTF Trip Logic on page 5 6 for more information on switch onto fault logic TR Other Trip Conditions Setting TR is the SELOGIC control equation trip setting most often used if tripping does not involve communications assisted setting DTT or switch onto fau...

Page 100: ...ne example in Figure 5 2 the Minimum Trip Duration Timer with setting TDURD outputs a logical 1 for a time duration of TDURD cycles any time it sees a rising edge on its input logical 0 to logical 1 transition if it is not already timing timer is reset The TDURD timer ensures that the TRIP Relay Word bit remains asserted at logical 1 for a minimum of TDURD cycles If the output of OR 1 gate is logi...

Page 101: ...toisolated input IN105 the following setting is made TR OC IN105 With this setting the OPEN command can provide a trip only if optoisolated input IN105 is asserted This is just one OPEN command supervision example many variations are possible Unlatch Trip Once Relay Word bit TRIP is asserted to logical 1 it remains asserted at logical 1 until all the following conditions come true Minimum Trip Dur...

Page 102: ...trol equation settings are TR M1P Z1G M2PT Z2GT 51GT OC trip conditions ULTR 50L 51G unlatch trip conditions The factory setting for the Minimum Trip Duration Timer setting is TDURD 9 000 cycles See the settings sheets in Section 9 Setting the Relay for setting ranges Set Trip In SELOGIC control equation setting TR M1P Z1G M2PT Z2GT 51GT OC Distance elements M1P M2PT Z1G and Z2GT and time overcurr...

Page 103: ...utputs Timers and Other Control Logic ULTR 52A Input IN101 has to be deenergized 52a circuit breaker auxiliary contact has to be open before the trip logic unlatches and the TRIP Relay Word bit deasserts to logical 0 ULTR 52A NOT 52A Unlatch Trip with 52b Circuit Breaker Auxiliary Contact A 52b circuit breaker auxiliary contact is wired to optoisolated input IN101 52A IN101 SELOGIC control equatio...

Page 104: ...reaker is closed into an existing fault condition For example suppose safety grounds are accidentally left attached to a line If the circuit breaker is closed into such a condition the resulting fault needs to be cleared right away and reclosing blocked An instantaneous element is usually set to trip in the three pole open 3PO logic and the SOTF trip logic Refer to the switch onto fault trip logic...

Page 105: ...ole open 3PO logic is the top half of Figure 5 3 It is not affected by enable setting ESOTF see Settings Sheet 1 in Section 9 Setting the Relay The open circuit breaker condition is determined by load current 50L and either one of Circuit breaker status 52A logical 0 Positive sequence voltage V1 27PO Select OPO 52 if 3PO is determined by circuit breaker status Select OPO 27 if 3PO is determined by...

Page 106: ...low load current levels When the circuit breaker is open Relay Word bit 50L drops out logical 0 and the 3PO condition asserts 3PO logical 1 circuit breaker open When the circuit breaker is closed Relay Word bit 50L picks up logical 0 current above phase pickup 50LP and the 3PO condition deasserts after the 3POD dropout time 3PO logical 0 circuit breaker closed Note that the 3PO condition is also r...

Page 107: ...n of SOTFD cycles any time it sees a rising edge on its input logical 0 to logical 1 transition if it is not already timing The SOTF logic output SOTFE asserts to logical 1 for SOTFD time Switch Onto Fault Logic Output SOTFE Relay Word bit SOTFE is the output of the circuit breaker operated SOTF logic or the close bus operated SOTF logic described previously Time setting SOTFD in each of these log...

Page 108: ...residual ground element picked up at time of trip 13 1 Zone Level 1 element picked up at time of trip 14 2 Zone Level 2 element picked up at time of trip 15 67P Phase instantaneous torque controlled element picked up at time of trip 16 67G Forward directional ground instantaneous torque controlled element picked up at time of trip Target LEDs numbered 2 through 5 and 7 through 16 in Table 5 1 are ...

Page 109: ...g DT Target LED The DT target LED illuminates at the rising edge of trip if the trip is the result of SELOGIC control equation setting DT see Figure 5 1 Use the DT target LED to indicate direct tripping via remote communications channels e g via serial port commands or SCADA asserting optoisolated inputs Use SELOGIC control equation setting DTT Direct Transfer Trip to accomplish this see Figure 5 ...

Page 110: ...otection element causes the trip and Phase A is involved in the fault likewise for B Phase B and C Phase C target LEDs G Target LED G target LED is illuminated at the rising edge of trip if a ground distance or residual ground overcurrent element causes the trip or was picked up and timing to trip Zone LED Zone Level LEDs illuminate for the lowest zone number detected during the fault M1P M2P Z1G ...

Page 111: ...urs SV7T asserts the occurrence can be displayed on the front panel with seal in logic and a rotating default display see Rotating Default Display in Section 7 and Section 11 also SV8 SV8 SV7T TRGTR DP3 SV8 DP3_1 BREAKER FAILURE DP3_0 blank Figure 5 4 Seal in of Breaker Failure Occurrence for Message Display If a breaker failure trip has occurred the momentary assertion of SV7T breaker failure tri...

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Page 113: ...anual TABLE OF CONTENTS SECTION 6 CLOSE LOGIC 6 1 Close Logic 6 1 Set Close 6 2 Unlatch Close 6 2 Factory Settings Example 6 2 Defeat the Close Logic 6 3 Circuit Breaker Status 6 3 Program an Output Contact for Closing 6 4 FIGURES Figure 6 1 Close Logic 6 1 ...

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Page 115: ...ons e g manual close initiation via serial port or optoisolated inputs The close logic in Figure 6 1 provides flexible circuit breaker closing with SELOGIC control equation settings 52A breaker status CL close conditions other than automatic reclosing ULCL unlatch close conditions other than circuit breaker status or close failure and setting CFD Close Failure Time See the settings sheet in Sectio...

Page 116: ...s for setting CL If a user wants to supervise the CLOSE command with optoisolated input IN106 the following setting is made CL CC IN106 With this setting the CLOSE command can provide a close only if optoisolated input IN106 is asserted This is just one CLOSE command supervision example many variations are possible Unlatch Close If the CLOSE Relay Word bit is asserted at logical 1 it stays asserte...

Page 117: ...r Control Logic for more 52A setting examples With setting CFD 60 00 cycles once the CLOSE Relay Word bit asserts it remains asserted at logical 1 no longer than a maximum of 60 cycles If the Close Failure Timer times out Relay Word bit CF asserts to logical 1 forcing the CLOSE Relay Word bit to logical 0 Defeat the Close Logic If SELOGIC control equation circuit breaker auxiliary setting 52A is s...

Page 118: ...sing In the factory settings the resultant of the close logic in Figure 6 1 is routed to output contact OUT103 with the following SELOGIC control equation OUT103 CLOSE See Output Contacts in Section 7 Inputs Outputs Timers and Other Control Logic for more information on programming output contacts ...

Page 119: ...e Latch Control Switch Settings with Care 7 17 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 Setting Group Change 7 22 Active Setting Group Switching Exam...

Page 120: ...tch Active Setting Group Switching 7 26 Table 7 8 Mnemonic Settings for Metering on the Rotating Default Display 7 43 Table 7 9 Mnemonic Settings for Self Check Status on the Rotating Default Display 7 46 FIGURES Figure 7 1 Example Operation of Optoisolated Inputs IN101 Through IN106 7 2 Figure 7 2 Circuit Breaker Auxiliary Contact and Close Enable Switch Connected to Optoisolated Inputs IN101 and...

Page 121: ...tating Selector Switch Connected to Inputs IN101 IN102 and IN103 for Active Setting Group Switching 7 26 Figure 7 22 Active Setting Group 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 Failu...

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Page 123: ...vercurrent and voltage 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 Serial Port Communications and Commands for more information...

Page 124: ...arest 1 8 cycle For example if setting IN105D 0 80 internally the timer runs at the nearest 1 8 cycle 6 8 cycles 6 8 0 75 For most applications the input pickup dropout debounce timers should be set in 1 4 cycle increments The relay processing interval is 1 4 cycle so Relay Word bits IN101 through IN106 are updated every 1 4 cycle The optoisolated input status may assert input debounce timer setti...

Page 125: ...ct and Close Enable 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...

Page 126: ...he SELOGIC control equation to block all breaker close operations CL IN102 CC Connect input IN102 to a close enable switch When the close enable switch is open input IN102 is deenergized and the SELOGIC equation CLOSE is blocked CL IN102 CC logical 0 CC logical 0 CLOSE DISABLED When the close enable switch is closed input IN102 is energized and the SELOGIC equation CL enabled CL IN102 CC logical 1...

Page 127: ...ocal 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 switch the local control switch positions are enabled by making corresponding label settings Note...

Page 128: ...NLBn is the overall switch 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 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 Local bit LBn is in either...

Page 129: ... 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 130: ...itches Local Bit Label Settings Function LB3 NLB3 MANUAL TRIP trips breaker 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 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 l...

Page 131: ...f a local control switch is in the OFF position corresponding local bit is deasserted to logical 0 when power is lost it comes back in the OFF position corresponding local bit is still deasserted to logical 0 when power is restored This feature makes the local bit feature behave the same as a traditional installation with panel mounted control switches If power is lost to the panel the front panel...

Page 132: ...Bn n 1 to 16 called remote bits Use these remote bits in SELOGIC control equations Any given remote control switch can be put in one of the following three positions ON logical 1 OFF logical 0 MOMENTARY logical 1 for one processing interval Remote Bit Application Ideas With SELOGIC control equations the remote bits can be used in applications similar to those that local bits are used in see preced...

Page 133: ...nge it comes back in the OFF position corresponding remote bit is still deasserted to logical 0 after the change If settings are changed for a setting group other than the active setting group there is no interruption of the remote bits the relay is not momentarily disabled LATCH CONTROL SWITCHES The latch control switches are enabled using the ELAT setting Set ELAT to the number of latch control ...

Page 134: ...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 135: ... In this example a contact is connected to optoisolated input IN104 Each pulse of the pushbutton contact changes the state of the close enable The pushbutton contact is not maintained just pulsed to enable disable the circuit breaker closing Figure 7 12 Pushbutton Contact Pulses Input IN104 to Enable Disable Circuit Breaker Closing If the circuit breaker closing is enabled and the pushbutton conta...

Page 136: ...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 NOT LT1 IN104 NOT logical 0 IN104 rising edge of input IN104 RST1 IN104 LT1 IN104 logical 0 logical 0 If latch bit LT1 logical 1 input IN104 is routed to setting RST1 reset latch bit LT1 SET1 IN104 LT1 IN104 N...

Page 137: ...l 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 then appear to enable the reset input setting RST1 the next processing interval But the rising edge condition occurred during the preceding processing interval IN104 is now at logical 0 so setting RST1 does not assert ...

Page 138: ...l latching relays In a traditional installation if power is lost to the panel the latching relay output contact position remains unchanged Note Although the relay retains the state of a latched bit when power is cycled the relay cannot hold output contact closure when power is removed from the relay output contacts go to their deenergized states Settings Change or Active Setting Group Change If in...

Page 139: ...e Table 7 3 For example when setting Group 4 becomes the active setting group latch bit LT2 should be reset Make the following SELOGIC control equation settings in setting Group 4 SV7 SG4 RST2 SV7T NOT SV7T Figure 7 15 Time Line for Reset of Latch Bit LT2 After Active Setting Group Change In Figure 7 15 latch bit LT2 is reset deasserted to logical 0 when reset setting RST2 asserts to logical 1 for...

Page 140: ...e preceding circuit breaker closing enable disable example application Figure 7 12 through Figure 7 14 the pushbutton contact cannot be asserting deasserting continuously thus causing latch bit LT1 to change state continuously Note that the rising edge operators in the SET1 and RST1 settings keep latch bit LT1 from cyclically operating for any single assertion of the pushbutton contact Another var...

Page 141: ...Date Code 20011205 Inputs Outputs Timers and Other Control Logic 7 19 SEL 311A Instruction Manual Figure 7 17 Latch Control Switch with Time Delay Feedback Operation Time Line ...

Page 142: ...Group 3 is the 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 ...

Page 143: ... logical 0 setting Group 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 T...

Page 144: ...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 145: ...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 146: ...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 147: ...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 148: ...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 149: ...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 150: ...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 151: ...gh 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 The SELOGIC control equation variables timers are enabled using the ESV setting Set ESV to the number of SELOGIC control equation variables timers that are desired N 1 16 Sixteen 16 SELOG...

Page 152: ...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 153: ...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 154: ... 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 active setting group switch Preceding Figure 7 25 shows an effective seal in logic circuit created by use of Relay Word bit SV7 SELOGIC control equation ...

Page 155: ...output contact closes or opens as demonstrated in Figure 7 26 An a type output contact is open when the output contact coil is deenergized and closed when the output contact coil is energized A b type output contact is closed when the output contact coil is deenergized and open when the output contact coil is energized Notice in Figure 7 26 that all four possible combinations of output contact coi...

Page 156: ...command PULSE ALARM is executed the ALARM Relay Word bit momentarily asserts to logical 1 Also when the relay enters Access Level 2 the ALARM Relay Word bit momentarily asserts to logical 1 and the ALARM output contact coil is deenergized momentarily Notice in Figure 7 26 that all possible combinations of ALARM output contact coil states energized or deenergized and output contact types a or b are...

Page 157: ...Light Installations Note that Figure 7 27 corresponds to Figure 7 2 Circuit Breaker Closing Enabled Indication In Figure 7 27 the CLOSING ENABLED panel light illuminates when the Close Enable switch is closed When the Close Enable switch is open the CLOSING ENABLED panel light extinguishes and it is understood that the circuit breaker closing is disabled Circuit Breaker Status Indication In Figure...

Page 158: ...d SET T View these text settings using the serial port command SHO T see Section 9 Setting the Relay and Section 10 Serial Port Communications and Commands These text settings are displayed on the SEL 311A 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 fol...

Page 159: ... 52 CLOSE ENABLED Circuit Breaker Closing Disabled In Figure 7 28 optoisolated input IN102 is deenergized to disable the circuit breaker closing resulting in DP1 IN102 logical 0 This results in the display of corresponding text setting DP1_0 on the front panel display 52 CLS DISABLED Circuit Breaker Status Indication Make SELOGIC control equation display point setting DP2 DP2 IN101 Make correspond...

Page 160: ...itional 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 28 DP2_1 BREAKER CLOSED displays when DP2 logical 1 DP2_0 b...

Page 161: ...ine 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 LINE 1204 This can also be realized with the following settings DP5 0 set directly to logical 0 DP5_1 blank DP5_0 LINE 1204 displays when DP5 log...

Page 162: ...LS DISABLED displayed when DP1 logical 0 Circuit Breaker Closing Enabled In Figure 7 28 optoisolated input IN102 is energized to enable the circuit breaker closing resulting in DP1 IN102 logical 1 This results in the display of corresponding text setting DP1_1 on the front panel display 52 CLOSE ENABLED Circuit Breaker Closing Disabled In Figure 7 28 optoisolated input IN102 is deenergized to disa...

Page 163: ...ying text in Section 5 Trip and Target Logic for an example of resetting a rotating default display with the TARGET RESET pushbutton Displaying Time Overcurrent Elements on the Rotating Default Display The LCD can display the pickup settings for the time overcurrent elements in primary units via a special character sequence in the display points equations As with the previously described display p...

Page 164: ...manently rotate in the display The DPn logic equation can be set to control the text display turning it on and off under certain conditions With the relay set as shown above the LCD will show the following PHASE TRIPS AT 1200 00 A pri then NEUTRAL TRIPS AT 150 00 A pri With the control string set on the even display points DP2 DP4 DP6 and the description set on the odd display points DP1 DP3 each ...

Page 165: ...ay on the rotating LCD screen Table 7 8 Mnemonic Settings for Metering on the Rotating Default Display Mnemonic Display Description IA I A x x x x A y y y º IA input current IB I B x x x x A y y y º IB input current IC I C x x x x A y y y º IC input current IP I P x x x x A y y y º IN input current VA V A x x x x K V y y y º VA input voltage VB V B x x x x K V y y y º VB input voltage VC V C x x x...

Page 166: ...x IP peak current 3I2DEM 3 I 2 D E M x x x x 3I2 demand current 3I2PK 3 I 2 P E A K x x x x 3I2 peak current MWADI MWA I N D E M x x x x A demand megawatts in MWAPI MWA I N P K x x x x A peak megawatts in MWBDI MW B I N D E M x x x x B demand megawatts in MWBPI MW B I N P K x x x x B peak megawatts in MWCDI MW C I N D E M x x x x C demand megawatts in MWCPI MW C I N P K x x x x C peak megawatts in...

Page 167: ...egawatt hours in MWHCO MW h C O U T x x x x x C megawatt hours out MWH3I MW h 3 I N x x x x x three phase megawatt hours in MWH3O MW h 3 O U T x x x x x three phase megawatt hours out MVRHAI M V A R h A I x x x x x A megavar hours in MVRHAO M V A R h A O x x x x x A megavar hours out MVRHBI M V A R h B I x x x x x B megavar hours in MVRHBO M V A R h B O x x x x x B megavar hours out MVRHCI M V A R...

Page 168: ...tion available without using pushbuttons The values shown Table 7 9 in can be set to automatically display on the rotating LCD screen Table 7 9 Mnemonic Settings for Self Check Status on the Rotating Default Display Mnemonic Display Description BRKDATE R S T D A T m m d d y y last reset date BRKTIME R S T T I M h h m m s s last reset time CTRLTR C T R L T R I P S x x x x x internal trip count OPSC...

Page 169: ...s Example This example demonstrates use of the rotating display to show metering quantities automatically on the rotating default display This example will set the EXTTR CTRLTR CTRLIA EXTIA and WEARA to display in the rotating default display Set the following SET T SET L DP1_0 EXTTR DP1 0 DP2_0 CTRLTR DP2 0 DP3_0 CTRLIA DP3 0 DP4_0 EXTIA DP4 0 DP5_0 WEARA DP5 0 Setting DPn 0 and using the DPn_0 i...

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Page 171: ...set Demand Metering Information 8 27 Demand Metering Updating and Storage 8 27 Energy Metering 8 27 View or Reset Energy Metering Information 8 27 Energy Metering Updating and Storage 8 28 Maximum Minimum Metering 8 28 View or Reset Maximum Minimum Metering Information 8 28 Maximum Minimum Metering Updating and Storage 8 29 TABLES Table 8 1 Breaker Maintenance Information for an Example Circuit Br...

Page 172: ...DC Voltage Elements with SELOGIC Control Equations 8 16 Figure 8 11 Response of Thermal and Rolling Demand Meters to a Step Input setting DMTC 15 minutes 8 20 Figure 8 12 Current IS Applied to Parallel RC Circuit 8 21 Figure 8 13 Demand Current Logic Outputs 8 24 Figure 8 14 Raise Pickup of Residual Ground Time Overcurrent Element for Unbalance Current 8 25 ...

Page 173: ...ance The breaker monitor 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 Settings Sheet 13 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 Serial Port Communications and Commands T...

Page 174: ... 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 311A 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 175: ...Date Code 20011205 Breaker Monitor and Metering Functions 8 3 SEL 311A Instruction Manual Figure 8 1 Plotted Breaker Maintenance Points for an Example Circuit Breaker ...

Page 176: ...KASP1 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 ...

Page 177: ...Date Code 20011205 Breaker Monitor and Metering Functions 8 5 SEL 311A Instruction Manual Figure 8 2 SEL 311A Relay Breaker Maintenance Curve for an Example Circuit Breaker ...

Page 178: ... 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 Figure 5 1 Refer to Figure 8 3 When BKMON asserts Relay Word bit TRIP goes from logical 0 to logical 1 the breaker monitor reads in the current values and applies them to the breaker monitor m...

Page 179: ...r 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 changes from 2 5 kA to 12 0 kA Value 12 0 kA is interrupted 11 times 11 close open operations 24 13 pushing the b...

Page 180: ...8 8 Breaker Monitor and Metering Functions Date Code 20011205 SEL 311A Instruction Manual Figure 8 4 Breaker Monitor Accumulates 10 Percent Wear ...

Page 181: ...Date Code 20011205 Breaker Monitor and Metering Functions 8 9 SEL 311A Instruction Manual Figure 8 5 Breaker Monitor Accumulates 25 Percent Wear ...

Page 182: ...8 10 Breaker Monitor and Metering Functions Date Code 20011205 SEL 311A Instruction Manual Figure 8 6 Breaker Monitor Accumulates 50 Percent Wear ...

Page 183: ...Date Code 20011205 Breaker Monitor and Metering Functions 8 11 SEL 311A Instruction Manual Figure 8 7 Breaker Monitor Accumulates 100 Percent Wear ...

Page 184: ...ee BRE Command Breaker Monitor Data in Section 10 Serial Port Communications and Commands The BRE command displays the following information Accumulated number of relay initiated trips Accumulated interrupted current from relay initiated trips Accumulated number of externally initiated trips Accumulated interrupted current from externally initiated trips Percent circuit breaker contact wear for ea...

Page 185: ...ip 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 1 If TRIP is asserted TRIP logical 1 the current and trip count information is accumulated under relay initiated trips Rly Trips If TRIP is deasserted TRIP logic...

Page 186: ...asserts energizing the trip bus the breaker monitor will deem it an externally initiated trip This is because when BKMON is newly asserted input IN106 energized the TRIP Relay Word bit is deasserted Thus the current and trip count information is accumulated under externally initiated trips Ext Trips STATION DC BATTERY MONITOR The station dc battery monitor in the SEL 311A Relay can alarm for under...

Page 187: ...power supply limits listed in Section1 Introduction and Specifications Figure 8 9 DC Under and Overvoltage Elements Logic outputs DCLO and DCHI in Figure 8 9 operate as follows DCLO 1 logical 1 if Vdc pickup setting DCLOP 0 logical 0 if Vdc pickup setting DCLOP DCHI 1 logical 1 if Vdc pickup setting DCHIP 0 logical 0 if Vdc pickup setting DCHIP Create Desired Logic for DC Under and Overvoltage Ala...

Page 188: ...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 cannot because of the total loss of power all output contacts deassert on total loss of power Thus the resultant dc voltage element at the botto...

Page 189: ...ontact type a or 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 v...

Page 190: ...er trip coil any change in station dc battery voltage can be observed in column Vdc in the event report To generate an event report for external trips make connections similar to Figure 8 8 and program optoisolated input IN106 monitoring the trip bus in the SELOGIC control equation event report generation setting e g ER IN106 When the trip bus is energized any change in station dc battery voltage ...

Page 191: ... ac voltage powering the relay which is very near zero volts as displayed in column Vdc in event reports Pickup settings DCLOP and DCHIP should be set off DCLOP OFF DCHIP OFF since they are of no real use If a raw event report is displayed with the EVE R command column Vdc will display the sampled ac voltage waveform rather than the average DEMAND METERING The SEL 311A Relay offers the choice betw...

Page 192: ...nd Meters The example in Figure 8 11 shows the response of thermal and rolling demand meters to a step current input The current input is at a magnitude of zero and then suddenly goes to an instantaneous level of 1 0 per unit a step Figure 8 11 Response of Thermal and Rolling Demand Meters to a Step Input setting DMTC 15 minutes ...

Page 193: ...p current input top In general just as voltage VC across the capacitor in Figure 8 12 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 11 the thermal demand meter response middle is at 90 perc...

Page 194: ...y step calculation of the rolling demand response example in Figure 8 11 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 195: ...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 Table 8 3 Demand Meter Settings and Settings Range Setting Definition Range EDEM Demand meter type THM thermal ROL rolling DMTC Demand meter time constant 5 10 15 30 or 60 minutes PDEMP Phase demand current pickup OFF GDEMP...

Page 196: ...QDEM to alarm for high loading or unbalance conditions Use in other schemes such as the following example Figure 8 13 Demand Current Logic Outputs Demand Current Logic Output Application Raise Pickup for Unbalance Current During times of high loading the residual ground overcurrent elements can see relatively high unbalance current IG IG 3I0 To avoid tripping on unbalance current IG use Relay Word...

Page 197: ...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 control setting 51GTC being in the state 51GTC GDEM GDEM 50G1 NOT GDEM GDEM 50G1 NOT logical 0 logical 0 50G1 logical 1 Thus the residu...

Page 198: ...results in SELOGIC control equation torque control setting 51GTC being in the state 51GTC GDEM GDEM 50G1 NOT GDEM GDEM 50G1 NOT logical 1 logical 1 50G1 logical 0 50G1 50G1 Thus the residual ground time overcurrent element 51GT operates with an effective less sensitive pickup 50G1P 2 30 A secondary The reduced sensitivity keeps the residual ground time overcurrent element 51GT from tripping on hig...

Page 199: ...vailable via the front panel METER pushbutton See Figure 11 2 in Section 11 Front Panel Interface Demand Metering Updating and Storage The SEL 311A 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 dem...

Page 200: ...the relay at 23 50 hours on the previous day 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 Serial Port Communications and Commands The MET M command displays maximum minimum metering for the following values Currents IA B C IG Input currents A primary Residual ground current A p...

Page 201: ...ating of maximum minimum metering values The metering value is above the previous maximum or below the previous minimum for 2 cycles For voltage values the voltage is above 13 V secondary For current values the currents are above 0 25 A secondary 5 A nominal 0 05 A secondary 1 A nominal Megawatt and megavar values are subject to the above voltage and current thresholds The SEL 311A Relay stores ma...

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Page 203: ...e SEL 311A Relay 9 23 TABLES Table 9 1 Serial Port SET Commands 9 1 Table 9 2 Set Command Editing Keystrokes 9 2 Table 9 3 SEL 311A Relay Word Bits 9 7 Table 9 4 Relay Word Bit Definitions for the SEL 311A 9 8 FIGURES Figure 9 1 U S Moderately Inverse Curve U1 9 4 Figure 9 2 U S Inverse Curve U2 9 4 Figure 9 3 U S Very Inverse Curve U3 9 4 Figure 9 4 U S Extremely Inverse Curve U4 9 4 Figure 9 5 U...

Page 204: ......

Page 205: ...rs etc 12 13 SET R SER Sequential Events Recorder trigger conditions 14 SET T Text Front panel default display and local control text 15 18 SET P m Port Serial port settings for Serial Port m m 1 2 3 or F 19 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 See SHO Command Showset in Section 10 Serial Port Communicat...

Page 206: ...diting 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 relay checks each entry...

Page 207: ...rrent Relays 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 M0 02 1 tp TD 0 180 5 95 M2 1 tr TD 1 08 1 M2 tr TD 5 95 1 M2 U S V...

Page 208: ...g the Relay Date Code 20011205 SEL 311A 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 209: ... Code 20011205 Setting the Relay 9 5 SEL 311A 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 210: ... 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 211: ...TAR51P TAR51G 1 A B C G ZONE1 ZONE2 TAR67P TAR67G 2 M1P M1PT Z1G Z1GT M2P M2PT Z2G Z2GT 3 Z1T Z2T 50P1 67P1 67P1T 50G1 67G1 67G1T 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...

Page 212: ...an be a or b type contacts See Figure 2 7 and Figure 7 26 for more information on the operation of output contacts OUT101 through ALARM Table 9 4 Relay Word Bit Definitions for the SEL 311A Row Bit Definition Primary Application 0 EN Relay enabled see Table 5 1 Target TRP Relay trip TIME Time delayed trip TARDT Direct trip target SOTF Switch onto fault trip TARLOP Loss of potential target TAR51P P...

Page 213: ... M2PT Zone 2 phase distance time delayed see Figure 3 9 Z2G Zone 2 ground distance instantaneous see Figure 3 7 Z2GT Zone 2 ground distance time delayed see Figure 3 9 3 Z1T Zone 1 phase and or ground distance time delayed see Figure 3 9 Z2T Zone 2 phase and or ground distance time delayed see Figure 3 9 50P1 Phase instantaneous overcurrent element A B or C above pickup setting 50P1P see Figure 3 ...

Page 214: ...ential see Figure 4 1 Testing Special directional control schemes ILOP Internal loss of potential see Figure 4 1 Distance directional control enable ZLOAD ZLOUT ZLIN see Figure 4 3 Special phase overcurrent element control ZLOUT Load encroachment load out element see Figure 4 3 ZLIN Load encroachment load in element see Figure 4 3 5 LB1 LB2 LB3 LB4 LB5 LB6 LB7 LB8 Local Bit 1 asserted see Figure 7...

Page 215: ...mote Bit 6 asserted see Figure 7 9 Remote Bit 7 asserted see Figure 7 9 Remote Bit 8 asserted see Figure 7 9 Remote control via serial port 8 RB9 RB10 RB11 RB12 RB13 RB14 RB15 RB16 Remote Bit 9 asserted see Figure 7 9 Remote Bit 10 asserted see Figure 7 9 Remote Bit 11 asserted see Figure 7 9 Remote Bit 12 asserted see Figure 7 9 Remote Bit 13 asserted see Figure 7 9 Remote Bit 14 asserted see Fig...

Page 216: ...ELOGIC control equation variable timer input SV4 asserted see Figure 7 23 SV1T SELOGIC control equation variable timer output SV1T asserted see Figure 7 23 Control SV2T SELOGIC control equation variable timer output SV2T asserted see Figure 7 23 SV3T SELOGIC control equation variable timer output SV3T asserted see Figure 7 23 SV4T SELOGIC control equation variable timer output SV4T asserted see Fi...

Page 217: ...ntrol equation variable timer output SV10T asserted see Figure 7 24 SV11T SELOGIC control equation variable timer output SV11T asserted see Figure 7 24 SV12T SELOGIC control equation variable timer output SV12T asserted see Figure 7 24 14 SV13 SV14 SV15 SV16 SELOGIC control equation variable timer input SV13 asserted see Figure 7 24 SELOGIC control equation variable timer input SV14 asserted see F...

Page 218: ...ault trip 16 MAG1 Mho ground distance A phase zone 1 see Figure 3 6 Testing MBG1 Mho ground distance B phase zone 1 see Figure 3 6 MCG1 Mho ground distance C phase zone 1 see Figure 3 6 MAG2 Mho ground distance A phase zone 2 see Figure 3 7 MBG2 Mho ground distance B phase zone 2 see Figure 3 7 MCG2 Mho ground distance C phase zone 2 see Figure 3 7 DCHI Station dc battery instantaneous overvoltage...

Page 219: ...active see Table 7 3 SG4 Setting group 4 active see Table 7 3 SG5 Setting group 5 active see Table 7 3 SG6 Setting group 6 active see Table 7 3 OC Asserts 1 4 cycle for Open Command execution see OPE Command Open Breaker in Section 10 Serial Port Communications and Commands Control CC Asserts 1 4 cycle for Close Command execution see CLO Command Close Breaker in Section 10 Serial Port Communicatio...

Page 220: ...igure 5 1 Output contact assignment 50QF Forward direction negative sequence overcurrent threshold exceeded see Figures 4 5 4 6 and 4 14 Directional threshold 50GF Forward direction residual ground overcurrent threshold exceeded see Figures 4 5 and 4 7 21 32QF Forward directional control routed to phase distance elements see Figures 4 13 and 4 14 Directional control 32GF Forward directional contro...

Page 221: ...sserted see Figure 7 1 Optoisolated input IN104 asserted see Figure 7 1 Optoisolated input IN103 asserted see Figure 7 1 Optoisolated input IN102 asserted see Figure 7 1 Optoisolated input IN101 asserted see Figure 7 1 Relay input status Control via optoisolated inputs 24 ALARM ALARM output contact indicating that relay failed or PULSE ALARM command executed see Figure 7 26 Relay output status Con...

Page 222: ...T Phase time overcurrent element 51PT timed out see Figure 3 14 Tripping 51PR Phase time overcurrent element 51PT reset see Figure 3 14 Testing 29 35 36 Tripping MPP1 Zone 1 compensator distance phase to phase element see Figure 3 4 MABC1 Zone 1 compensator distance three phase element see Figure 3 4 MPP2 Zone 2 compensator distance phase to phase element see Figure 3 5 MABC2 Zone 2 compensator di...

Page 223: ...MB7A Channel A transmit bit 7 TMB6A Channel 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 b...

Page 224: ...tions are for settings that do not have reference information anywhere else in the instruction manual Identifier Labels Refer to Settings Sheet 1 The SEL 311A 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 protection scheme Typical terminal identifiers include an abbreviation of th...

Page 225: ...xample if a particular line length is 15 miles enter the line impedance values W 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 Refer to Settings Sheets 1 2 and 13 The enable settings on Settings Sheets 1 and 2 E21P through EADVS control the settings that fol...

Page 226: ...ear format set DATE_F to YMD to display dates in Year Month Day format SETTINGS SHEETS The settings sheets 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 ...

Page 227: ...agnitude 0 05 255 00 W secondary 5 A nom 0 25 1275 00 W secondary 1 A nom Z1MAG Positive sequence line impedance angle 5 00 90 00 degrees Z1ANG Zero sequence line impedance magnitude 0 05 255 00 W secondary 5 A nom 0 25 1275 00 W secondary 1 A nom Z0MAG Zero sequence line impedance angle 5 00 90 00 degrees Z0ANG Line length 0 10 999 00 unitless LL Application Settings See Section 14 Application 31...

Page 228: ... see Figure 8 11 EDEM Advanced settings Y N EADVS Mho Phase Distance Elements Number of mho phase distance element settings dependent on preceding enable setting E21P 1 2 Zone 1 OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom see Figure 3 4 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 5 Z2P Mho Phase Distance Fault Detector Settings ...

Page 229: ...ZSC factor magnitude 0 000 6 000 unitless k0M ÝZone 2 ZSC factor angle 180 00 to 180 00 k0A Mho Phase Distance Element Time Delays See Figure 3 9 Number of mho phase distance element time delay settings dependent on preceding enable setting E21P 1 2 Zone 1 time delay OFF 0 00 16000 00 cycles Z1PD Zone 2 time delay OFF 0 00 16000 00 cycles Z2PD Mho Ground Distance Element Time Delays See Figure 3 9...

Page 230: ...ry 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 Element See Figure 3 15 Make the following settings if preceding enable setting E51G Y Pickup OFF 0 50 16 00 A secondary 5 A nom 0 10 3 20 A secondary 1 A nom 51GP Curve U1 U5 C1 C5 see Figures ...

Page 231: ...directional 3I0 pickup 0 25 5 00 A secondary 5 A nom 0 05 1 00 A secondary 1 A nom 50GFP Positive sequence current restraint factor I0 I1 0 02 0 50 unitless a0 Make setting Z0F if preceding enable setting E32 Y and preceding setting ORDER contains V If E32 AUTO and ORDER contains V this setting is made automatically Forward directional Z0 threshold 64 00 64 00 W secondary 5 A nom 320 00 320 00 W s...

Page 232: ...9 00 cycles in 0 25 cycle steps SV3DO SV4 Pickup Time 0 00 999999 00 cycles in 0 25 cycle steps SV4PU SV4 Dropout Time 0 00 999999 00 cycles in 0 25 cycle steps SV4DO SV5 Pickup Time 0 00 999999 00 cycles in 0 25 cycle steps SV5PU SV5 Dropout Time 0 00 999999 00 cycles in 0 25 cycle steps SV5DO SV6 Pickup Time 0 00 999999 00 cycles in 0 25 cycle steps SV6PU SV6 Dropout Time 0 00 999999 00 cycles i...

Page 233: ... cycles in 0 25 cycle steps SV14PU SV14 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV14DO SV15 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV15PU SV15 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV15DO SV16 Pickup Time 0 00 16000 00 cycles in 0 25 cycle steps SV16PU SV16 Dropout Time 0 00 16000 00 cycles in 0 25 cycle steps SV16DO ...

Page 234: ...nto 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 3 also 52A Close conditions other than automatic reclosing or CLOSE command CL Unlatch close conditions ULCL Latch Bits Set Reset Equations See Figure 7 11 Set Latch Bit LT1 SET1 Reset Latch Bit LT1 RST1 Set Latch Bit LT2 SET...

Page 235: ...ol equation settings cannot be set directly to logical 0 Phase see Figure 3 14 51PTC Residual Ground see Figure 3 15 51GTC SELOGIC Control Equation Variable Timer Input Equations See Figures 7 23 and 7 24 SELOGIC control equation Variable SV1 SV1 SELOGIC control equation Variable SV2 SV2 SELOGIC control equation Variable SV3 SV3 SELOGIC control equation Variable SV4 SV4 SELOGIC control equation Va...

Page 236: ...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 DP16 Setting Group Selection Equ...

Page 237: ... zero sequence voltage polarized and channel IP current polarized directional elements see Figure 4 7 E32IV MIRRORED BITS Transmit Equations See Appendix H 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 TM...

Page 238: ... 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 1 179 cycles in 1 cycle steps for LER 180 Station DC Battery Monitor See Figures 8 9 and 8 10 DC battery instantaneous undervoltage pickup OFF 20 00 300 00 Vdc DCL...

Page 239: ...lowing 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 00 99...

Page 240: ...05 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 241: ...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 Label ...

Page 242: ... 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 7 c...

Page 243: ...rs DP3_0 Display if DP4 logical 1 16 characters 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 cha...

Page 244: ...16 characters DP13_1 Display if DP13 logical 0 16 characters DP13_0 Display if DP14 logical 1 16 characters DP14_1 Display if DP14 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 ...

Page 245: ...1 2 STOP Other Port 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 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 SEL DTA2 to communicate wi...

Page 246: ......

Page 247: ... Level 1 10 9 Access Level B 10 9 Access Level 2 10 10 Command Summary 10 10 Command Explanations 10 12 Access Level 0 Commands 10 12 Access Level 1 Commands 10 14 Access Level B Commands 10 32 Access Level 2 Commands 10 35 SEL 311A Relay Command Summary 10 39 TABLES Table 10 1 Pinout Functions for EIA 232 Serial Ports 2 3 and F 10 2 Table 10 2 Terminal Functions for EIA 485 Serial Port 1 10 2 Tab...

Page 248: ......

Page 249: ...lus Relay Gold and SmartCOM For the best display use VT 100 terminal emulation or the closest variation The default settings for all serial ports are Baud Rate 2400 Data Bits 8 Parity N Stop Bits 1 To change the port settings use the SET P command see Section 9 Setting the Relay or the front panel SET pushbutton PORT CONNECTOR AND COMMUNICATIONS CABLES Figure 10 1 DB 9 Connector Pinout for EIA 232...

Page 250: ... Table 10 2 Terminal Functions for EIA 485 Serial Port 1 Terminal Function 1 TX 2 TX 3 RX 4 RX 5 SHIELD 6 N C 7 IRIG B 8 IRIG B The following cable diagrams show several types of EIA 232 serial communications cables that connect the SEL 311A Relay to other devices SEL provides fiber optic transceivers and cable for communications links with improved safety noise immunity and distance as compared t...

Page 251: ...ND 5 5 GND CTS 8 8 CTS 7 RTS 1 DCD 4 DTR 6 DSR Cable C227A SEL 311A Relay 25 Pin DTE Device 9 Pin Male 25 Pin Female D Subconnector D Subconnector GND 5 7 GND TXD 3 3 RXD RXD 2 2 TXD GND 9 1 GND CTS 8 4 RTS 5 CTS 6 DSR 8 DCD 20 DTR SEL 311A to Modem or Other DCE Cable C222 SEL 311A 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 ...

Page 252: ...D 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 311A to SEL DTA2 Cable C272A SEL DTA2 SEL 311A Relay 9 Pin Male 9 Pin Male D Subconnector D Subconnector RXD 2 3 TXD TXD 3 2 RXD GND 5 5 GND RTS 7 7 RTS CTS 8 8 CTS SEL 311A to SEL PRTU Cable C231 SEL PRTU SEL 311A Relay 9 Pin Male 9 Pin Male Round Conxa...

Page 253: ...orts 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 characters If RTSCTS Y t...

Page 254: ...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 ETX Each message begins with the start of transmission character ASCII 02 and ends with the end of transmission character ASCII 03 Each line of the message ends with a carriage return and line feed 3 The relay implements XON XOFF flow control The rel...

Page 255: ...ore 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 described in Appendix D SEL Compressed ASCII Protocol SEL Compressed ASCII protocol provides compressed versions of some of the relay ASCII commands The protocol is described in Appendix E Distributed Network ...

Page 256: ... Y the AUTO setting is hidden and forced to Y With DTA set to Y the SEL 311A Relay is compatible with the SEL DTA2 Display Transducer Adapter SERIAL PORT ACCESS LEVELS Commands can be issued to the relay via the serial port to view metering values change relay settings etc The available serial port commands are listed in Table 10 5 The commands can be accessed only from the corresponding access le...

Page 257: ...the relay to go to Access Level 2 Enter the 2AC command at the Access Level 1 prompt 2AC ENTER The BAC command allows the relay to go to Access Level B Enter the BAC command at the Access Level 1 prompt BAC ENTER Access Level B When the relay is in Access Level B the relay sends the prompt Commands BRE n through PUL in Table 10 5 are available from Access Level B For example enter the CLO command ...

Page 258: ...ial port commands is also available via the front panel pushbuttons The correspondence between the serial port commands and the front panel pushbuttons is also given in Table 10 5 See Section 11 Front Panel Interface for more information on the front panel pushbuttons The serial port commands at the different access levels offer varying levels of control The Access Level 1 commands primarily allow...

Page 259: ...MET Metering data METER 1 SER Sequential Events Recorder 1 SHO Show view settings SET 1 STA Relay self test status STATUS 1 SUM Display Event Summary EVENTS 1 TAR Display relay element status OTHER 1 TIM View change time OTHER 1 TRI Trigger an event report B BRE n Preload reset breaker wear OTHER B CLO Close breaker B GRO n Change active setting group GROUP B OPE Open breaker B PUL Pulse output co...

Page 260: ...y by changing the DATE_F relay setting Time This is the time the command response was given except for relay response to the EVE or SUM command where it is the time the event occurred The serial port command explanations that follow in the Command Explanations subsection are in the same order as the commands listed in Table 10 5 COMMAND EXPLANATIONS Access Level 0 Commands ACC Command Go to Access...

Page 261: ...el 0 At the Access Level 0 prompt enter the ACC command ACC ENTER Because the Password jumper is not in place the relay asks for the Access Level 1 password to be entered Password The relay is shipped with the default Access Level 1 password OTTER Enter the default password Password OTTER ENTER The relay responds SEL 311A Date 03 01 00 Time 16 22 04 372 EXAMPLE BUS B BREAKER 3 Level 1 The prompt i...

Page 262: ... much the same with command BAC or 2AC entered at the access level screen prompt The relay closes the ALARM contact for one second after a successful Level B or Level 2 access If access is denied the ALARM contact closes for one second Access Level 1 Commands 2AC and BAC Commands See previous discussion on passwords BRE Command Breaker Monitor Data Use the BRE command to view the breaker monitor r...

Page 263: ...or 0 Framing error 0 Loopback 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 L ENTER COM L ENTER COM L ENTER COM L ENTER SEL 311A Date 03 10 00 Time 16 24 01 623 EXAMPLE BUS B BREAKER 3 FID SEL 311A R100 V0 Z001001 D20000301 CID FF27 Summary for Mirrored Bits ch...

Page 264: ...D BITS channels are enabled omitting the channel specifier in the clear command will cause both channels to be cleared DAT Command View Change Date DAT displays the date stored by the internal calendar clock If the date format setting DATE_F is set to MDY the date is displayed as month day year If the date format setting DATE_F is set to YMD the date is displayed as year month day To set the date ...

Page 265: ...setting If x is C or c the relay clears the event summaries and all corresponding event reports from nonvolatile memory The event summaries include the date and time the event was triggered the type of event the fault location the maximum phase current in the event the power system frequency the number of the active setting group the reclose shot count and the front panel targets To display the re...

Page 266: ...olumn is one of the following TRIP event report generated by assertion of Relay Word bit TRIP ER event report generated by assertion of SELOGIC control equation event report trigger setting ER PULSE event report generated by execution of the PUL Pulse command TRIG event report generated by execution of the TRI Trigger command The TARGETS column will display any of the following illuminated front p...

Page 267: ...age energy demand and maximum minimum logging of selected quantities To make the extensive amount of meter information manageable the relay divides the displayed information into four groups Instantaneous Demand Energy and Maximum Minimum MET k Instantaneous Metering The MET k command displays instantaneous magnitudes and angles if applicable of the following quantities Currents IA B C P IG Input ...

Page 268: ...6 192 614 198 090 0 302 4 880 I ANG DEG 8 03 128 02 111 89 52 98 81 22 A B C V MAG KV 11 691 11 686 11 669 V ANG DEG 0 00 119 79 120 15 A B C 3P MW 2 259 2 228 2 288 6 774 MVAR 0 319 0 322 0 332 0 973 PF 0 990 0 990 0 990 0 990 LAG LAG LAG LAG I1 3I2 3I0 V1 V2 3V0 MAG 195 283 4 630 4 880 11 682 0 007 0 056 ANG DEG 8 06 103 93 81 22 0 12 80 25 65 83 FREQ Hz 60 00 VDC V 129 5 MET D Demand Metering T...

Page 269: ...tion on demand metering see Demand Metering in Section 8 Breaker Monitor and Metering Functions MET E Energy Metering The MET E command displays the following quantities Energy MWhA B C MWh3P MVARhA B C MVARh3P Single phase megawatt hours in and out Three phase megawatt hours in and out Single phase megavar hours in and out Three phase megavar hours in and out Reset Time Last time the energy meter...

Page 270: ...0 14 50 55 536 IC A 200 4 03 01 00 15 00 42 578 52 2 03 01 00 14 51 02 332 IP A 42 6 03 01 00 14 51 02 328 42 6 03 01 00 14 51 02 328 IG A 42 0 03 01 00 14 50 55 294 42 0 03 01 00 14 50 55 294 VA kV 11 7 03 01 00 15 01 01 576 3 4 03 01 00 15 00 42 545 VB kV 11 7 03 01 00 15 00 42 937 2 4 03 01 00 15 00 42 541 VC kV 11 7 03 01 00 15 00 42 578 3 1 03 01 00 15 00 42 545 MW3P 6 9 03 01 00 15 00 44 095...

Page 271: ...s SHO n Show relay settings n specifies the setting group 1 2 3 4 5 or 6 n defaults to the active setting group if not listed SHO L n Show SELOGIC control equation settings n specifies the setting group 1 2 3 4 5 or 6 n defaults to the active setting group if not listed SHO G Show global settings SHO P n Show serial port settings n specifies the port 1 2 3 or F n defaults to the active port if not...

Page 272: ... Y E50G N E51P N E51G Y E32 AUTO ELOAD Y ESOTF Y EFLOC Y ELOP Y ELOP Y EDEM THM EADVS N Z1P 6 24 Z2P 9 36 50PP1 0 50 Z1MG 6 24 Z2MG 9 36 50L1 0 50 Press RETURN to continue 50GZ1 0 50 k0M1 0 726 k0A1 3 69 Z1PD OFF Z2PD 20 00 Z1GD OFF Z2GD 20 00 Z1D OFF Z2D OFF 50P1P 11 25 67P1D 0 00 51GP 0 75 51GC U3 51GTD 2 00 51GRS Y ZLF 9 22 ZLR 9 22 PLAF 30 00 NLAF 30 00 PLAR 150 00 NLAR 210 00 ORDER QVI CLOEND...

Page 273: ...1G 52A IN101 CL CC ULCL TRIP SET1 0 RST1 0 SET2 0 RST2 0 SET3 0 RST3 0 SET4 0 RST4 0 SET5 0 RST5 0 Press RETURN to continue SET6 0 RST6 0 SET7 0 RST7 0 SET8 0 RST8 0 SET9 0 RST9 0 SET10 0 RST10 0 SET11 0 RST11 0 SET12 0 RST12 0 SET13 0 RST13 0 SET14 0 RST14 0 SET15 0 RST15 0 Press RETURN to continue SET16 0 RST16 0 67P1TC 1 51GTC 1 OUT101 TRIP OUT102 TRIP OUT103 CLOSE OUT104 0 OUT105 0 OUT106 0 OU...

Page 274: ... SHO G ENTER Global Settings TGR 180 00 NFREQ 60 PHROT 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 SHO P ENTER SHO P ENTER 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 SHO R ENTER SHO R ENTER SHO R ENTER Sequentia...

Page 275: ...SLB15 PLB15 NLB16 CLB16 SLB16 PLB16 DP1_1 BREAKER CLOSED DP1_0 BREAKER OPEN Press RETURN to continue DP2_1 DP2_0 DP3_1 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 DP14_1 DP14_0 DP15_1 DP15_0 DP16_1 DP16_0 STA Command Relay Self Test Status The STA command displays the status report showing the relay self test...

Page 276: ...ed dc offset voltages in millivolts for the current and voltage channels The MOF master status is the dc offset in the A D circuit when a grounded input is selected PS PS Power Supply displays power supply voltages in Vdc for the power supply outputs TEMP Displays the internal relay temperature in degrees Celsius RAM ROM CR_RAM critical RAM and EEPROM These tests verify that the relay memory compo...

Page 277: ...yed on all ports with AUTO Y whenever an event is generated To view a summary event report enter the command SUM ACK n N ext ENTER where no parameters Display the newest chronological summary event ACK Acknowledge the oldest unacknowledged summary event report available on this port or if a number is supplied acknowledge the specified summary n Display or acknowledge if ACK present the summary eve...

Page 278: ...w containing Relay Word bit name e g TAR 50P1 displays Relay Word Row 3 Valid names are shown in Table 9 3 and Table 9 4 k is an optional parameter to specify the number of times 1 32767 to repeat the Relay Word row display If k is not specified the Relay Word row is displayed once TAR R Clears front panel tripping target LEDs TRIP TIME DT SOTF 51P 51G A B C G Zone 1 Zone 2 67P and 67G Unlatches t...

Page 279: ...generate an event report TRI ENTER TRI ENTER TRI ENTER TRI ENTER Triggered If the serial port AUTO setting Y the relay sends the summary event report SEL 311A Date 03 01 00 Time 10 12 45 627 EXAMPLE BUS B BREAKER 3 Event TRIG Location Trip Time 00002 Freq 60 00 Group 1 Close Time Targets Breaker Open PreFault IA IB IC IP IG 3I2 VA VB VC MAG A kV 200 199 199 1 2 0 131 420 131 560 131 460 ANG DEG 0 ...

Page 280: ... 8 ENTER 0 8 ENTER IB 0 00 0 9 ENTER 0 9 ENTER 0 9 ENTER 0 9 ENTER IC 0 00 1 1 ENTER 1 1 ENTER 1 1 ENTER 1 1 ENTER Percent Wear 0 100 A phase 0 25 ENTER 25 ENTER 25 ENTER 25 ENTER B phase 0 28 ENTER 28 ENTER 28 ENTER 28 ENTER C phase 0 24 ENTER 24 ENTER 24 ENTER 24 ENTER Are you sure Y N Y ENTER Y ENTER Y ENTER Y ENTER SEL 311A Date 09 24 01 Time 12 22 21 506 EXAMPLE BUS B BREAKER 3 Rly Trips 11 I...

Page 281: ...TER CLO ENTER CLO ENTER CLO ENTER Close Breaker Y N Y ENTER Y ENTER Y ENTER Y ENTER Are you sure Y N Y ENTER Y ENTER Y ENTER Y ENTER Typing N ENTER after either of the above prompts will abort the command The CLO command is supervised by the main board Breaker jumper see Table 2 3 If the Breaker jumper is not in place Breaker jumper OFF the relay does not execute the CLO command and responds Abort...

Page 282: ...y Word bit OC can then be programmed into the SELOGIC control equation TR to assert the TRIP Relay Word bit which in turn asserts an output contact e g OUT101 TRIP to trip a circuit breaker See Figure 5 1 See the discussion following Figure 5 2 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 ...

Page 283: ...tep command that allows you to control Relay Word bits RB1 through RB16 see Rows 7 and 8 in Table 9 3 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 8 The following example shows the steps necessary to pu...

Page 284: ...ysically 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 mode on that channel for 5 minutes while the in...

Page 285: ... ENTER PAS 1 BIKE ENTER PAS 1 BIKE ENTER Set After entering new passwords type PAS ENTER to inspect them Make sure they are what you intended and record the new passwords Passwords may include up to six characters Valid characters consist of A Z a z 0 9 and Upper and lower case letters are treated as different characters Examples of valid distinct passwords include OTTER otter Ot3456 TAIL 123456 1...

Page 286: ......

Page 287: ...r if Date Format setting DATE_F MDY DAT y m d Enter date in this manner if Date Format setting DATE_F YMD EVE n Show event report number n with 1 4 cycle resolution EVE L n Show event report number n with 1 16 cycle resolution EVE R n Show raw event report number n with 1 16 cycle resolution EVE C n Show compressed event report number n for use with SEL 5601 Analytic Assistant GRO Display active g...

Page 288: ...or k 1 30 seconds Parameter n must be specified k defaults to 1 if not specified Access Level 2 Commands The Access Level 2 commands allow unlimited access to relay settings parameters and output contacts All Access Level 1 and Access Level B commands are available from Access Level 2 The screen prompt is CON n Control Remote Bit RBn Remote Bit n n 1 8 Execute CON n and the relay responds CONTROL ...

Page 289: ...otating Default Display 11 9 Scroll Lock Control of Front Panel LCD 11 12 Stop Scrolling Lock 11 13 Restart Scrolling Unlock 11 13 Single Step 11 13 Exit 11 13 Cancel 11 13 Additional Rotating Default Display Example 11 13 FIGURES Figure 11 1 SEL 311A Relay Front Panel Pushbuttons Overview 11 1 Figure 11 2 SEL 311A Relay Front Panel Pushbuttons Primary Functions 11 2 Figure 11 3 SEL 311A Relay Fro...

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Page 291: ...secondary A primary function is selected first e g METER pushbutton After a primary function is selected the pushbuttons revert to operating on their secondary functions CANCEL SELECT left right arrows up down arrows EXIT For example after the METER pushbutton is pressed the up down arrows are used to scroll through the front panel metering screens The primary functions are activated again when th...

Page 292: ...Command Metering Data in Section 10 Some of the front panel primary functions do not have serial port command equivalents These are discussed in the following subsection Functions Unique to the Front Panel Interface Figure 11 2 SEL 311A Relay Front Panel Pushbuttons Primary Functions Front Panel Password Security Refer to the comments at the bottom of Figure 11 3 concerning Access Level B and Acce...

Page 293: ...ls with LCD 11 3 SEL 311A Instruction Manual The factory default passwords for Access Level 1 B and 2 are Access Level Factory Default Password 1 OTTER B EDITH 2 TAIL Table 2 3 Figure 11 3 SEL 311A Relay Front Panel Pushbuttons Primary Functions Continued ...

Page 294: ...red function Then press the SELECT pushbutton to select the function Use left right arrows to underscore a desired setting digit Then use the up down arrows to change the digit After the setting 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...

Page 295: ...Date Code 20011205 Front Panel Interface Only on Models with LCD 11 5 SEL 311A Instruction Manual Figure 11 4 SEL 311A Relay Front Panel Pushbuttons Secondary Functions ...

Page 296: ...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 Rows 5 and 6 in Tables 9 3 and 9 4 Local control can emulate the following switch types in Figure 11 5 through Fig...

Page 297: ...bel settings were made the following message displays with the rotating default display messages Press CNTRL for Local Control Assume the following settings TR LB3 Trip setting includes LB3 CL LB4 Close setting includes LB4 NLB3 MANUAL TRIP CLB3 RETURN PLB3 TRIP NLB4 MANUAL CLOSE CLB4 RETURN PLB4 CLOSE Press the CNTRL pushbutton and the first set local control switch displays MANUAL TRIP Position ...

Page 298: ...TRIP Position TRIP Because this is an OFF MOMENTARY type switch the MANUAL TRIP switch returns to the RETURN position after momentarily being in the TRIP position Technically the MANUAL TRIP switch being an OFF MOMENTARY type switch is in the TRIP position for one processing interval 1 4 cycle long enough to assert the corresponding local bit LB3 to logical 1 and then returns to the RETURN positio...

Page 299: ... to enable disable reclosing If local bit LB1 is at logical 1 reclosing is enabled If power to the relay is turned off and then turned on again local bit LB1 remains at logical 1 and reclosing is still enabled This is akin to a traditional panel where enabling disabling of re closing and other functions is accomplished by panel mounted switches If dc control voltage to the panel is lost and then r...

Page 300: ... and BREAKER OPEN are enabled for display they also enter into the display rotation display time SCROLD The following table and figures demonstrate the correspondence between changing display point states e g DP2 and DP4 and enabled display point labels DP2_1 DP2_0 and DP4_1 DP4_0 respectively The display time is equal to global setting SCROLD for each screen The display point example settings are...

Page 301: ...play Point Label Settings DP2 LB1 DP4 IN101 logical 0 logical 0 DP2_1 CLOSE ENABLED DP2_0 CLOSE DISABLED DP4_1 BREAKER CLOSED DP4_0 BREAKER OPEN DP2 LB1 DP4 IN101 logical 1 logical 0 DP2_1 CLOSE ENABLED DP2_0 CLOSE DISABLED DP4_1 BREAKER CLOSED DP4_0 BREAKER OPEN DP2 LB1 DP4 IN101 logical 1 logical 1 DP2_1 CLOSE ENABLED DP2_0 CLOSE DISABLED DP4_1 BREAKER CLOSED DP4_0 BREAKER OPEN ...

Page 302: ...lay point label settings are set with the SET T command or viewed with the SHO T command via the serial port see Section 9 Setting the Relay and SHO Command Show View Settings in Section 10 Serial Port Communications and Commands For more detailed information on the logic behind the rotating default display see Rotating Default Display in Section 7 Inputs Outputs Timers and Other Control Logic Scr...

Page 303: ...ock ON SELECT to Unlock Restart Scrolling Unlock The SELECT key unlocks the LCD and resumes the rotating display Single Step From the Scroll Locked state single step through the display screens by pressing the SELECT key twice Wait for the first press to display the next screen as the active display then press the SELECT key a second time to freeze scrolling Exit Press the EXIT key to leave Scroll...

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Page 305: ...24 SER Triggering 12 24 Making SER Trigger Settings 12 24 Retrieving SER Reports 12 25 Clearing SER Report 12 26 Example Sequential Events Recorder SER Report 12 26 TABLES Table 12 1 Event Types 12 4 Table 12 2 Standard Event Report Current Voltage and Frequency Columns 12 8 Table 12 3 Output Input and Protection and Control Element Event Report Columns 12 9 Table 12 4 Communication Elements Event...

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Page 307: ...med condition changes state The relay stores the latest 512 lines of the SER report in nonvolatile memory If the report fills up newer rows overwrite the oldest rows in the report See Figure 12 5 for an example SER report STANDARD 15 30 60 180 CYCLE EVENT REPORTS See Figure 12 2 for an example event report Note Figure 12 2 is on multiple pages Event Report Length Settings LER and PRE The SEL 311A ...

Page 308: ...OP The elements in this example setting are M2P Zone 2 phase distance element asserted see Figure 3 5 Z2G Zone 2 ground distance element asserted see Figure 3 7 51G Residual ground current above pickup setting 51GP for residual ground time overcurrent element 51GT see Figure 3 15 50P1 Phase current above pickup setting 50P1P for phase overcurrent element 50P1 see Figure 3 10 LOP Loss of potential ...

Page 309: ...so generates a corresponding event summary see Figure 12 1 Event summaries contain the following information Relay and terminal identifiers settings RID and TID Date and time when the event was triggered Event type Fault location Breaker Trip Time System frequency at trigger time Active Settings Group Breaker Close Time Front panel fault type targets at the time of trip Breaker Status open or clos...

Page 310: ...0 0 0 0 Figure 12 1 Example Event Summary The relay sends event summaries to all serial ports with setting AUTO Y each time an event triggers The latest event summaries are stored in nonvolatile memory and are accessed by the SUM and HIS Event Summaries History commands Event Type The Event field shows the event type The possible event types and their descriptions are shown in the table below Note...

Page 311: ... Z1ANG Z0MAG and Z0ANG and corresponding line length setting LL See the SET command in Table 9 1 and corresponding Settings Sheet 2 in Section 9 Setting the Relay for information on the line parameter settings Trip and Close Times Trip and close times follow 52A Relay Word bit contact changes during the event A blank value indicates that a trip or close did not occur Targets The relay reports the ...

Page 312: ...ing to the number displayed in the HIS report Defaults to 1 if not listed where 1 is the most recent event Sx Display x samples per cycle 4 or 16 defaults to 4 if not listed Ly Display y cycles of data 1 to LER Defaults to LER value if not listed Unfiltered reports R parameter display an extra cycle of data L Display 16 samples per cycle same as the S16 parameter R Specifies the unfiltered raw eve...

Page 313: ...d the SEL 5601 Analytic Assistant software take advantage of the compressed ASCII format Use the EVE C command or CEVENT CEV command to display compressed ASCII event reports See the CEVENT command discussion in Appendix E Compressed ASCII Commands for further information Filtered and Unfiltered Event Reports The SEL 311A Relay samples the basic power system measurands ac voltage ac current statio...

Page 314: ...y columns Table 12 2 Standard Event Report Current Voltage and Frequency Columns Column Heading Definition IA Current measured by channel IA primary A IB Current measured by channel IB primary A IC Current measured by channel IC primary A IP Current measured by channel IP primary A IG Calculated residual current IG 3I0 IA IB IC primary A VA Voltage measured by channel VA primary kV VB Voltage meas...

Page 315: ...t If Zone 2 AB phase phase distance element MAB2 set not ZAB1 Z PP2 MPP1 MPP2 1 2 If Zone 1 phase phase distance element MPP1 set If Zone 2 phase phase distance element MPP2 set not ZPP1 ZBC1 MBC1 MBC2 1 2 If Zone 1 BC phase phase distance element MBC1 set If Zone 2 BC phase phase distance element MBC2 set not ZBC1 Z 3P2 MABC1 MABC2 1 2 If Zone 1 3 phase distance element MABC1 set If Zone 2 3 phas...

Page 316: ...asserted 50G2 asserted both 50G1 and 50G2 asserted 32 Q F32Q Q Forward negative sequence directional element F32Q picked up 32 QVI F32QG Q Forward negative sequence ground directional element F32Q picked up F32V V Forward zero sequence ground directional element F32V picked up F32I I Forward current polarized ground directional element F32I picked up 67P 67P1 1 67P1 asserted 67G 67G1 1 67G1 assert...

Page 317: ...Output contact OUT106 asserted Both OUT105 and OUT106 asserted Out1 7 A OUT107 ALARM 7 Output contact OUT107 asserted A Output contact ALARM asserted b Both OUT107 and ALARM 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 IN103 IN104 3 4 b Optoisolated input IN103 asserted Optoisolated input IN104 asserted...

Page 318: ... asserted TMB A 5 6 TMB5A TMB6A 5 MIRRORED BITS channel A transmit bit 5 TMB5A asserted 6 MIRRORED BITS channel A transmit bit 6 TMB6A asserted b Both TMB5A and 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 bi...

Page 319: ...d TMB4B asserted TMB B 5 6 TMB5B TMB6B 5 MIRRORED BITS channel B transmit bit 5 TMB5B asserted 6 MIRRORED BITS channel B transmit bit 6 TMB6B asserted b Both TMB5B 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 rec...

Page 320: ...ed CBAD CBADA CBADB A MIRRORED BITS channel A unavailability CBADA asserted B MIRRORED BITS channel B unavailability CBADB asserted b Both CBADA and CBADB asserted LBOK LBOKA LBOKB A MIRRORED BITS channel A loopback OK LBOKA asserted B MIRRORED BITS channel A loopback 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 LB...

Page 321: ...ficant as 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 The following example standard 15 cycle event report in Figure 12 2 also corresponds to the example sequential events recorder SER report in Figure 12 5 The boxed numbers in Figure 12 2 correspond to the SER row numbers in Figure 12 5 The row explanations follow Figure 12 5 In Figure 12 ...

Page 322: ...1 1945 1975 0 201 112 4 5 5 103 5 24 107 3 6 104 1533 1500 1 71 68 4 113 8 47 7 24 64 8 170 1945 1973 0 198 112 4 5 4 103 6 24 106 1 105 1533 1503 1 75 68 4 113 8 47 7 24 64 2 172 1944 1973 1 201 112 4 5 3 103 6 24 105 1 7 104 1536 1504 0 72 68 5 113 8 47 5 24 63 7 171 1944 1971 0 198 112 3 5 3 103 6 24 104 4 105 1538 1507 1 74 68 6 113 8 47 5 24 63 3 171 1940 1970 0 201 112 2 5 1 103 7 24 103 8 8...

Page 323: ...68 9 0 0 1 1 1 111 4 4 7 116 3 24 110 8 15 1 0 0 0 1 70 0 131 6 61 7 24 69 1 1 0 0 0 1 111 3 4 8 116 4 24 110 9 0 1 1 1 2 70 1 131 5 61 6 24 69 3 0 1 0 1 1 111 3 4 9 116 4 24 111 1 Protection and Contact I O Elements 21 V 51 50 32 67 Dm ZZZZZZ P Q ZLV Out1 In1 ABCABC O V P P lOd 1357 135 BCAGGG L PG PG QI PG QG dPc 246A 246 1 V o 1 V o 1 V o 1 V o 1 2 V o 1 V o 1 V o 1 V o 1 3 V o 1 V o 1 V o 1 V ...

Page 324: ...rp QQ b V rp b 12 V rr b V rr b V rr b V r b 13 V r b V r b V r b V r b 14 V r V r V r V r 15 V r V r V r V r Communication Elements S TMB RMB TMB RMB RRCL Lcl Rem Ltch SELogic 3O A A B B OBBB PT 1357 1357 1357 1357 KAAO O RW RW RW RW RW RW 1111111 OF 2468 2468 2468 2468 DDK C 5 6 7 8 9 10 1234567890123456 1 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 2 00 00 00 00 40 0...

Page 325: ...00 00 40 00 9 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 10 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 11 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 12 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 13 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 00 00 00 00 40 00 14 00 00 00 00...

Page 326: ... 0 50 50GZ1 0 50 k0M1 0 726 k0A1 3 69 Z1PD OFF Z2PD 20 00 Z1GD OFF Z2GD 20 00 Z1D OFF Z2D OFF 50P1P 11 25 67P1D 0 00 51GP 0 75 51GC U3 51GTD 2 00 51GRS Y ZLF 9 22 ZLR 9 22 PLAF 30 00 NLAF 30 00 PLAR 150 00 NLAR 210 00 ORDER QVI CLOEND OFF 52AEND 10 00 SOTFD 30 00 DMTC 60 PDEMP OFF GDEMP OFF QDEMP OFF TDURD 9 00 CFD 60 00 3POD 0 50 OPO 52 50LP 0 25 SELogic group 1 SELogic Control Equations TR M1P Z...

Page 327: ...07 0 DP1 52A DP2 0 DP3 0 DP4 0 DP5 0 DP6 0 DP7 0 DP8 0 DP9 0 DP10 0 DP11 0 DP12 0 DP13 0 DP14 0 DP15 0 DP16 0 SS1 0 SS2 0 SS3 0 SS4 0 SS5 0 SS6 0 ER M2P Z2G 51G 50P1 LOP FAULT 51G M2P Z2G CLMON 0 E32IV 1 Global Settings TGR 1800 00 NFREQ 60 PHROT 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 Figu...

Page 328: ...mn data relates to the actual sampled waveform and RMS values Figure 12 4 shows how the event report current column data can be converted to phasor RMS values Voltages are processed similarly Figure 12 3 Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform In Figure 12 3 note that any two rows of current data from the event report in Figure 12 2 1 4 cycle ...

Page 329: ...Date Code 20011205 Standard Event Reports and SER 12 23 SEL 311A Instruction Manual Figure 12 4 Derivation of Phasor RMS Current Values From Event Report Current Values ...

Page 330: ... each element in the SER lists every 1 4 cycle If an element changes state the relay time tags the changes in the SER For example setting SER1 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 co...

Page 331: ...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 332: ... 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 Clearing SER Report Clear the SER report from nonvolatile memory with the SER C comm...

Page 333: ...5 Example Sequential Events Recorder SER Event Report The SER event report rows in Figure 12 5 are explained in the following text numbered in correspondence to the column The boxed numbered comments in Figure 12 2 also correspond to the column numbers in Figure 12 5 The SER event report in Figure 12 5 may contain records of events that occurred before and after the standard event report in Figure...

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Page 335: ...13 11 Test Setup 13 11 Test Source Connections 13 11 Serial Communication Equipment Connections 13 16 Test Procedures 13 17 Overcurrent Elements 13 17 Negative Sequence Directional Element 13 19 Phase Mho Distance Elements 13 29 Ground Mho Distance Elements 13 35 Troubleshooting Test Results 13 42 Relay Self Tests 13 43 Relay Troubleshooting 13 46 Inspection Procedure 13 46 Troubleshooting Procedu...

Page 336: ...round Fault Test Connections Using Two Current Sources 13 13 Figure 13 4 Three Phase Fault and METER Test Connections Using Two Current Sources 13 14 Figure 13 5 Phase to Ground Fault Test Connections Using a Single Current Source 13 15 Figure 13 6 Phase to Phase Fault Test Connections Using a Single Current Source 13 16 Figure 13 7 Communications Connections Between the SEL 311A Relay and a Termi...

Page 337: ...y 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 acceptance testin...

Page 338: ... 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 relay ...

Page 339: ...mary for each oscillographic event report Use the SUM command to view and acknowledge the event summaries Use the event summary to quickly verify proper relay operation Compare the reported fault current and voltage magnitudes and angles against the reported fault location and fault type If you question the relay response or your test method obtain the oscillographic event report for a more detail...

Page 340: ...ng module relay main board You can test the relay processing module using signals from the SEL RTS Low Level Relay Test System Never apply voltage signals greater than 9 volts peak to peak to the low level test interface Figure 13 1 shows the signal scaling factors CAUTION The relay contains devices sensitive to Electrostatic Discharge ESD When working on the relay with front or top cover removed ...

Page 341: ...of the LCD displays all elements asserted in Relay Word Row 28 The relay maps the state of the elements in Relay Word Row 28 on the bottom row of LEDs The 51PT element state is reflected on the LED labeled B See Table 9 3 and Table 9 4 for the correspondence between the Relay Word elements and the TAR command To view the 51PT element status from the serial port issue the TAR 51PT command The relay...

Page 342: ...es and the SEL 311C has four zones Settings E21P E21MG and E21XG will need to be set to 2 instead of 3 when testing the SEL 311A Equipment Required The following equipment is necessary for initial checkout 1 Source of control power 2 Source of three phase voltages and at least two currents 3 Ohmmeter or contact opening closing sensing device Checkout Procedure Step 1 Purpose Be sure you received t...

Page 343: ... service is lost Step 4 Purpose Apply power supply voltage to the relay and access the relay via the optional LCD front panel Method Turn on the voltage source connected to the relay power supply inputs If you are using a battery simulator as the relay power supply voltage source be sure the simulator voltage level is stabilized The relay front panel Enable target EN should illuminate EN should ap...

Page 344: ...or of 1 73 Real power P should be approximately 160 1 MW reactive power Q should be approximately 0 MVAR If you inadvertently switched a pair of voltages or currents the MW reading should be approximately zero It is important to remember this when commissioning the relay using system voltages and currents Step 9 Purpose Use the front panel setting feature to adjust a relay setting Method The follo...

Page 345: ...per line of the display reads LL 100 00 Press SELECT Use the left right up and down arrow keys to change the setting to LL 99 00 Press SELECT Press EXIT Press SELECT YES to save the new settings Step 10 Purpose Test the fault locator Method Test the fault locator using the voltages and currents in Table 13 1 These voltages and currents were obtained for various locations and fault types assuming a...

Page 346: ... the expected results Table 13 2 Output Contact and Target LED Results Location Type Output Relays Target LEDs 75 miles AG OUT1 OUT2 OUT4 INST Zone 1 A G 75 miles BC OUT1 OUT2 OUT4 INST Zone 1 B C 85 miles AG OUT1 OUT2 OUT4 TIME Zone 2 A G 85 miles BC OUT1 OUT2 OUT4 TIME Zone 2 B C Output Contact Explanation The OUT1 and OUT2 are set to close for trips The relay is set to trip instantaneously for ...

Page 347: ...ile you are reviewing the fault data press the EXIT button then the EVENT button to review the new data You may review the long form event report for each fault using a terminal connected to one of the relay serial ports Each event report is a record of the currents voltages relay element states and logic input and contact output states See Section 12 Standard Event Reports and SER for further det...

Page 348: ... Voltage Source and Two Current Source Connections Figure 13 3 and Figure 13 4 show connections to use when three voltage sources and two current sources are available Phase to phase phase ground and two phase ground faults may be simulated using the connections shown in Figure 13 3 Three phase faults may be simulated using the connections shown in Figure 13 4 ...

Page 349: ...Date Code 20011205 Testing and Troubleshooting 13 13 SEL 311A Instruction Manual Figure 13 3 Phase to Phase Phase to Ground and Two Phase to Ground Fault Test Connections Using Two Current Sources ...

Page 350: ...rrent Sources Three Voltage Source and One Current Source Connections Figure 13 5 and Figure 13 6 show connections to use when three voltage sources and a single current source are available Phase ground faults may be simulated using the connections shown in Figure 13 5 Phase to phase faults may be simulated using the connections shown in Figure 13 6 ...

Page 351: ...Date Code 20011205 Testing and Troubleshooting 13 15 SEL 311A Instruction Manual Figure 13 5 Phase to Ground Fault Test Connections Using a Single Current Source ...

Page 352: ... relay event reports We recommend using a terminal during relay testing Figure 13 7 shows typical connections between a computer and the SEL 311A Relay Port F Complete details regarding serial communications with the relay may be found in Section 10 Serial Port Communications and Commands WARNING Use only serial communications cables manufactured by SEL or built to SEL specifications with the SEL ...

Page 353: ...element under test If the element under test is supervised by other conditions be sure that you understand the inputs necessary to satisfy the supervisory conditions and the overcurrent condition Step 2 Verify the element setting by executing the SHOWSET command via a terminal connected to a relay serial port or by examining the relay settings via the front panel LCD display using the Access Level...

Page 354: ...r C phase current Test using single phase current 50P1 50P2 50P3 Residual Residual current IR IA IB IC Test using single phase current 50G1 50G2 50G3 50G4 50GF 50GR Negative Sequence 3 I2 IA a2 IB a IC Test using single phase current 50Q1 50Q2 50Q3 50Q4 50QF 50QR Positive Sequence I1 1 3 IA a IB a2 IC Test using three phase or single phase current 50ABC Overcurrent Element Test Examples Examples b...

Page 355: ...1 element asserts causing OUT106 to close This should occur when current applied is approximately 11 25 amps Note As you perform this test other protection elements may assert causing the relay to close other output contacts and assert relay targets This is normal and is not a cause for concern Negative Sequence Directional Element The SEL 311A Relay includes phase F32Q and R32Q and ground F32QG a...

Page 356: ...ault ondary sec amps 90 2 I ondary sec volts 180 10 V 90 ANG 1 Z 2 2 Ð Ð Ð 2 2 90 2 90 1 180 Re 10 c 2 Z Ð Ð Ð 4 ohms 20 c 2 Z ohms 5 c 2 Z Notice that the result of Equation 13 1 is positive for a reverse fault and negative for a forward fault This result is consistent with actual behavior on the power system The relay determines fault direction by comparing the result of Equation 13 1 to forward...

Page 357: ...s for both Z2F and Z2R may be either positive or negative depending upon the constraints of the relay application Negative Sequence Directional Element Supervisory Conditions There are a number of supervisory conditions that must be fulfilled before the relay asserts the negative sequence directional elements These supervisory conditions are described below Magnitude of 3I2 The SEL 311A Relay uses...

Page 358: ... voltage and current sources set ELOP N to simplify the test Negative Sequence Directional Element Test Using Single Voltage and Current Sources Step 1 Execute the SHOWSET command and verify the following relay settings Z1MAG Z1ANG Z2F 50QF Z2R 50QR and a2 The example relay settings use the following settings Z1MAG 7 8 W Z1ANG 83 97 Z2F 0 77 W 50QF 0 5 amps secondary Z2R 5 45 W 50QR 0 5 amps secon...

Page 359: ... V a V a V V Using single phase signals simplifies the V2 and I2 calculations A 3 1 2 A 3 1 2 C B C B I I V V amps 0 I I volts 0 V V Assume that you apply a test voltage VA 18 0 Ð180 volts secondary volts 180 0 6 V volts 180 0 18 V 2 3 1 2 Ð Ð Determine the test angle of A phase current from the Z1ANG relay setting Equation 13 1 yields a positive result when I2 lags V2 by the angle of Z1ANG Equati...

Page 360: ...when Z2c is less than Z2FT As the magnitude of IA is increased the magnitudes of Z2c and Z2m decrease For magnitudes of IA less than 23 4 amps F32Q should not assert given the other test quantities For IA magnitudes greater than 23 4 amps Z2c applied is less than Z2FT so F32Q asserts Step 5 Turn on the voltage source Apply VA 18 0 V Ð180 IA 0 0 A Ð96 Slowly increase the magnitude of IA without var...

Page 361: ... to close other output contacts and assert relay targets This is normal and is not a cause for concern Negative Sequence Directional Element Test Using Three Voltage Sources and One Current Source Step 1 Execute the SHOWSET command and verify the following relay settings Z1MAG Z1ANG Z2F 50QF Z2R 50QR and a2 The example relay settings use the following settings Z1MAG 7 8 W Z1ANG 83 97 Z2F 0 77 W 50...

Page 362: ...e magnitude and angle of negative sequence voltages and currents You can calculate the magnitude and angle of V2 and I2 given the magnitude and angle of each of the phase quantities using the equations below C B 2 A 3 1 2 C B 2 A 3 1 2 I a I a I I V a V a V V Using a single phase current source simplifies the I2 calculation A 3 1 2 C B I I amps 0 I I Assume that you apply the following test voltag...

Page 363: ... 3 3 I ohms 45 5 volts 0 6 3 I A A Calculate Z2m ohms 45 5 m 2 Z A 1 1 V 0 6 m 2 Z I V m 2 Z 2 2 Because Z2R is positive use Equation 13 4 to calculate Z2RT ohms 45 5 RT 2 Z 45 5 25 0 45 5 75 0 RT 2 Z m 2 Z 25 0 R 2 Z 75 0 RT 2 Z The R32Q element asserts when Z2c applied is greater than Z2RT As the magnitude of IA is increased the magnitudes of Z2c and Z2m decrease For magnitudes of IA less than 3...

Page 364: ...t varying the phase angle The relay R32Q element asserts closing OUT107 when IA 0 5 amps This indicates that Z2c applied is greater than Z2RT 3I2 is greater than 50QR and I2 is greater than a2 I1 where a2 is the relay setting Continue to increase the magnitude of IA R32Q deasserts when IA 3 3 amps indicating that Z2c is now less than Z2RT F32Q asserts closing OUT106 when IA 23 4 amps indicating th...

Page 365: ...zone must be set to reach in the same direction Reach is set in secondary ohms The phase distance element maximum reach angle is always equal to the angle of Z1ANG Each zone has an instantaneous indication For example the M3P element asserts without intentional time delay for A B B C or C A faults within the Zone 3 characteristic All zones also include time delayed indication through elements M1PT...

Page 366: ...ge signals set ELOP N to simplify the test Load Encroachment Logic The relay includes Load Encroachment logic to help prevent the relay phase distance elements from operating improperly under heavy load conditions Forward and reverse load regions are defined using impedance and angle settings The relay calculates the positive sequence impedance If the calculated impedance falls within the set load...

Page 367: ...lays the current logic settings Type Y ENTER to accept those settings Connect output OUT106 to the sense input of your test set an ohmmeter or some other contact sensing device Step 3 Connect the voltage sources to the relay A phase B phase and C phase voltage inputs Connect the current source to the relay B phase and C phase current inputs Refer to the voltage and current connections shown in Fig...

Page 368: ...ated by the following equations TEST BC B BC C B BC C B TEST I 2 I I 2 I I I I I I I With a 50PP2 setting of 2 22 amps 50PP2 picks up when ITEST is greater than 1 11 amps The 50QF negative sequence overcurrent element operates based upon the magnitude of 3I2 applied Using the current connections shown in Figure 13 6 we can calculate the magnitude of 3I2 applied based upon the magnitude of ITEST Ð ...

Page 369: ...ngs the magnitude of VBC equals 46 8 volts From the equations above select the following test voltage magnitudes and angles volts 150 8 46 V volts 150 8 46 V volts 0 0 67 V C B A Ð Ð Ð The phase distance element maximum reach is measured when faulted phase to phase current lags faulted phase to phase voltage by the distance element maximum torque angle In the SEL 311A Relay the phase distance elem...

Page 370: ... Ð Ð Ð Ð Due to the test connections used IB IC ITEST Ð Ð Ð 03 6 A 5 2 I 97 173 A 5 2 I 0 A 0 0 I C B A amps 03 96 44 1 I amps 03 6 5 2 120 1 97 173 5 2 240 1 0 0 0 I 2 3 1 2 Ð Ð Ð Ð Ð Ð Using Equation 13 1 to calculate Z2c the result is ohms 47 15 c 2 Z ohms 91 2 FT 2 Z 47 15 25 0 77 0 25 1 FT 2 Z ohms 47 15 m 2 Z The Z2FT threshold is 2 91 W Z2c applied 15 47 W is less than the Z2FT threshold ba...

Page 371: ...he magnitude of ITEST2 using Equation 13 10 sec amps Angle pedance Im Test New Angle pedance Im Line cos I I 1 TEST 2 TEST amps 54 3 I amps 45 cos 5 2 I amps 97 38 97 83 cos 5 2 I 2 TEST 2 TEST 2 TEST Equation 13 10 Note As you perform this test other protection elements may assert causing the relay to close other output contacts and assert relay targets This is normal and is not a cause for conce...

Page 372: ...distance elements Phase and Ground Nondirectional Overcurrent Elements 50Ln and 50GZn Each zone ground distance element is supervised by two nondirectional overcurrent elements 50GZn and 50Ln where n indicates the zone associated with the overcurrent element For example the relay may assert the Zone 3 A ground distance element only if the A phase current is greater than the 50L3 setting and the re...

Page 373: ...ing relay settings Z1MAG Z1ANG E21MG E32 Z2MG 50L2 50GZ2 k0M1 k0A1 ORDER Z2F and 50QF The example relay settings use the following settings Z1MAG 7 8 Z1ANG 83 97 E21G 3 E32 Y Z2MG 9 36 W 50L2 0 50 50GZ2 0 50 k0M 0 726 k0A 3 69 ORDER Q Z2F 0 77 W 50QF 0 5 amps secondary Execute the SET command and change the following settings Change E21XG to N and ELOP from Y to N Changing the E21XG setting preven...

Page 374: ...gnals that fulfill the impedance and supervisory requirements of the relay but are within the ability of the test sources to produce accurately The Zone 2 ground distance element is forward reaching Thus it is supervised by the forward directional element 32GF as well as the 50L2 and 50GZ2 phase and residual overcurrent elements Applied phase current must exceed the 50L2 setting applied residual c...

Page 375: ...ctor for Zone 1 ground distance elements When the advanced user settings are not enabled EADVS N the remaining zone settings k0M and k0A follow k0M1 and k0A1 The impedance measured by the relay ground mho distance element for a Zone 2 fault is defined by the following equation R A A AG I 0 k I V Z Equation 13 11 Where k0 k0M Ðk0A For a fault on a radial system and when testing a ground distance el...

Page 376: ... are supervised by the negative sequence directional element It is important to check the negative sequence quantities applied and verify that the 32GF element should assert allowing the forward reaching distance element to operate Calculate the magnitude and angle of negative sequence voltage and current applied for the test quantities listed above Then calculate the negative sequence impedance Z...

Page 377: ...current angle to 82 Slowly increase the magnitude of current applied until the Z2G element asserts causing OUT106 to close This occurs when current applied is approximately 2 5 amps You may wish to test the distance element characteristic at impedance angles other than the line positive sequence impedance angle To do this you must adjust the magnitude and angle of ITEST from the values shown in Ta...

Page 378: ... small signals to the connected current and voltage inputs Trigger an event report using the TRIGGER command Plot the magnitude and angle of measured currents and voltages Check the TR TRCOMM and TRSOTF settings to determine which elements are enabled to trip Check the output logic equation settings to determine which outputs are enabled to trip Check the settings of elements that are enabled to t...

Page 379: ...ignals were applied to cause the element under test to assert RELAY SELF TESTS The relay runs a variety of self tests The relay takes the following corrective actions for out of tolerance conditions see Table 13 5 Protection Disabled The relay disables overcurrent elements and trip close logic All output contacts are deenergized The EN front panel LED is extinguished ALARM Output The ALARM output ...

Page 380: ... 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 V REG Warning 4 75 V 5 20 V 4 75 V 5 25 V No Pulsed Measures the regulated 5 V power supply every 10 seconds Failure 4 50 V 5 40 V 4 50 V 5 50 V Yes Latched 12 V PS Warning 11 50 V 12 50 V No Pulsed Measures the 12 V power supply every 10 seconds Failure 11 20 V 14 00 V Yes Latched 15 V PS Warnin...

Page 381: ...Yes Latched Performs a checksum test on the nonvolatile copy of the relay settings every 10 seconds The following self tests are performed by dedicated circuitry in the microprocessor and the SEL 311A Relay main board Failures in these tests shut down the microprocessor and are not shown in the STATUS report Micro processor Crystal Failure Yes Latched The relay monitors the microprocessor crystal ...

Page 382: ...djustment Use the steps below to adjust the contrast a Remove the relay front panel by removing the six front panel screws b Press any front panel button The relay should turn on the LCD back lighting c Locate the contrast adjust potentiometer adjacent to the serial port connector d Use a small screwdriver to adjust the potentiometer e Replace the relay front panel Relay Does Not Respond to Comman...

Page 383: ...not loose or defective 5 Inspect the relay self test status with the STA command or with the front panel STATUS button RELAY CALIBRATION The SEL 311A Relay is factory calibrated If you suspect that the relay is out of calibration please contact the factory FACTORY ASSISTANCE We appreciate your interest in SEL products and services If you have questions or comments please contact us at Schweitzer E...

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Page 385: ...1A Secondary Quantities 14 2 Convert SEL 2PG10 Relay Settings to SEL 311A Relay Settings 14 2 Convert SEL 2PG10 Output Mask Logic Settings to SELOGIC Control Equations 14 5 SEL 2PG10 Settings Sheets 14 9 TABLES Table 14 1 SEL 311A Settings Calculated From SEL 2PG10 Settings 14 3 Table 14 2 SEL 311A SELOGIC Equation Equivalent to Each SEL 2PG10 Mask Logic Setting 14 5 Table 14 3 SELOGIC Equivalent ...

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Page 387: ...11A do not change setting APP back to 2PG10 As described above when setting APP 2PG10 the user is presented only with SEL 311A settings associated with the features found in an SEL 2PG10 This section explains how to make those remaining SEL 311A settings directly from the settings used in an SEL 2PG10 There are mainly two kinds of settings in the SEL 311A relay settings and SELOGIC settings Relay ...

Page 388: ...2PG10 impedance settings must be converted from percent of primary line impedance to secondary impedance in ohms For example the Zone 1 distance setting in the SEL 311A Z1P is calculated as MAG Z Z P Z 1 100 1 1 where Z1 is the SEL 2PG10 distance reach setting Z1MAG is the SEL 311A positive sequence line impedance setting in secondary ohms Z1P is the SEL 311A Zone 1 reach setting in secondary ohms...

Page 389: ...tings Sheets CTRP CTR PTR PTR PTRS SPTR Z1MAG R X CTR PTR 1 1 2 2 é ë ê ù û ú Section 9 Settings Sheets Z1ANG Arc X R tan 1 1 é ë ê ù û ú degrees MTA Z0MAG R X CTR PTR 0 0 2 2 é ë ê ù û ú Z0ANG Arc X R tan 0 0 é ë ê ù û ú degrees LL LL APP None Z1P MAG Z Z 1 100 where Z1MAG ú û ù ê ë é PTR CTR X R 2 2 1 1 Section 3 Phase Distance Elements Z1PD PTMR Section 3 Zone Time Delay Elements 50G1P SV1 50G1...

Page 390: ...1 U2 U3 U4 67NC 1 2 3 4 51GTD 67NTD 51GTC 67NC 51GTC is an SEL 311A SELOGIC setting 1 Non Directional 32GF Torque Controlled ORDER Q V I 32QE 32VE 32IE Section 4 Directional Control for Ground Distance and Residual Ground Overcurrent Elements Curve U1 in the SEL 311A is slightly different from curve 1 in the SEL 2PG10 Time dial adjustments may be necessary Note SEL 311A phase to phase fault detect...

Page 391: ...4 OUT104 MA5 OUT105 Table 14 3 shows all SEL 2PG10 Relay Word bits and an approximate equivalent SEL 311A SELOGIC expression when setting APP 2PG10 in the SEL 311A Table 14 2 shows each SEL 2PG10 Mask Logic Setting and the equivalent SEL 311A SELOGIC control equation To convert a SEL 2PG10 Mask Logic Setting to a SELOGIC control equation logically OR each appropriate SEL 2PG10 Relay Word bit equiv...

Page 392: ...PG10 the SEL 311A automatically sets the following SELOGIC control equations Change the settings just as you would change the Mask Logic settings in an SEL 2PG10 to customize the relay logic Table 14 4 Default SEL 2PG10 Mask Logic Setting for MT 50L ZABC ZP ZPT 67NP 67NT 67NI 67DT 0 1 1 0 0 1 1 0 Default Tripping Logic Equations TR MABC1 MPP1 51GT 67G1T OC SELOGIC Torque Control Equations 51GTC M2...

Page 393: ...2PG10 Relays 14 7 SEL 311A Instruction Manual Default Output Contact Logic Equations OUT101 TRIP OUT102 TRIP OUT103 MABC1 Reserved for A1 OUT104 MPP1 Reserved for A2 OUT105 51G Reserved for A3 OUT106 51GT Reserved for A4 OUT107 67G1T Reserved for A5 ...

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Page 395: ...00 W secondary 5 A nom 0 25 1275 00 W secondary 1 A nom Z0MAG Zero sequence line impedance angle 5 00 90 00 degrees Z0ANG Line length 0 10 999 00 unitless LL Application 311A 221F 221F3 221C 221 16 2PG10 APP 2PG10 Mho Phase Distance Elements See Settings Explanations in Section 3 Zone 1 OFF 0 05 64 00 W secondary 5 A nom 0 25 320 00 W secondary 1 A nom Z1P Mho Phase Distance Element Time Delays Se...

Page 396: ...l 0 Residual Ground see Figure 3 13 51GTC SELOGIC Control Equation Variable Timer Input Equations See Figures 7 23 and 7 24 SELOGIC control equation Variable SV1 SV1 Output Contact Equations See Figure 7 26 Output Contact OUT101 OUT101 Output Contact OUT102 OUT102 Output Contact OUT103 OUT103 Output Contact OUT104 OUT104 Output Contact OUT105 OUT105 Output Contact OUT106 OUT106 Output Contact OUT1...

Page 397: ...low an SEL DTA or SEL DTA2 to communicate with the relay This setting is available when PROTO SEL or LMD Set AUTO Y to allow automatic messages at the serial port Set RTSCTS Y to enable hardware handshaking With RTSCTS Y the relay will not send characters until the CTS input is asserted Also if the relay is unable to receive characters it deasserts the RTS line Setting RTSCTS is not applicable to ...

Page 398: ......

Page 399: ...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 4 A5C2 A5C3 Demand Peak Demand Fast Meter Configuration Messages D 4 A5D2 A5D3 Demand Peak Demand Fast Meter Message D 7 A5B9 Fast Meter Status Acknowledge Message D 7 A5CE Fast Operate C...

Page 400: ...rol Equations F 3 SELOGIC Control Equation Operators F 3 All SELOGIC Control Equations Must Be Set F 7 SELOGIC Control Equation Limitations F 8 Processing Order and Processing Interval F 9 APPENDIX G DISTRIBUTED NETWORK PROTOCOL DNP 3 00 G 1 Overview G 1 Configuration G 1 Data Link Operation G 2 Data Access Method G 2 Device Profile G 3 Object Table G 6 Data Map G 9 Relay Summary Event Data G 13 P...

Page 401: ...solicited Data Transfer Sent From Master to Relay I 3 18 Function Unsolicited Fast SER Response Sent From Relay to Master I 3 Acknowledge Message Sent from Master to Relay and from Relay to Master I 5 TABLES Table F 1 SELOGIC Control Equation Operators Listed in Processing Order F 3 Table G 1 Data Access Methods G 3 Table G 2 SEL 311A DNP Object Table G 6 Table G 3 SEL 311A Wye DNP Data Map G 9 FI...

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Page 403: ...n Added STA C command Added Fast SER SEL 311A R102 V0 Z001001 D20010625 This firmware differs from the original as follows Modified SEL 311 Relays to record consecutive event reports Modified the SUM command so that the Breaker Status reports the status from the last row of the event report SEL 311A R101 V0 Z001001 D20010518 This firmware differs from the original as follows Improved overflow supe...

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Page 405: ... computer Terminal emulation software that supports XMODEM CRC protocol e g CROSSTALK Microsoft Windows Terminal and HyperTerminal Procomm Plus Relay Gold or SmartCOM Serial communications cable SEL 234A or equivalent Disk containing firmware upgrade file UPGRADE PROCEDURE The instructions below assume you have a working knowledge of your personal computer terminal emulation software In particular...

Page 406: ...ompt 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 properly when just the ENTER key is pressed on the connected PC even though everything is OK 7 Make a copy of the fi...

Page 407: ...38400 at the SELBOOT prompt The firmware receive can be started again at Step 8 The file transfer takes approximately 6 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 L_D ENTER L_D ENTER L_D ENTER Disable relay to send or receive firmware Y N Y EN Y E...

Page 408: ...s will be in effect OTTER for level 1 TAIL for level 2 e Issue the Restore Settings R_S command to restore the factory default settings in the relay This takes about two minutes then the EN LED will illuminate Note If the relay asks for a part number to be entered use the number from the label on the firmware diskette or from the new part number sticker if supplied f Enter Access Level 2 by issuin...

Page 409: ...press ENTER If the relay reinitializes after saving the changes go to Access Level 2 15 Execute the Status STA command to verify that all relay self test parameters are within tolerance and that the relay is enabled 16 Apply current 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...

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Page 411: ... 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 promp...

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Page 413: ...ce 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 p...

Page 414: ...ngth 74 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...

Page 415: ...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 Analog channel type...

Page 416: ...rved checksum 1 byte checksum of all preceding bytes A5D1 Fast Meter Data Block In response to the A5D1 request the relay sends the following block Data Description A5D1 Command 94 Length 1 byte 1 Status Byte 80 bytes X and Y components of IA IB IC IP VA VB VC VS Freq and Vbatt in 4 byte IEEE FPS 8 bytes Time stamp 54 bytes 54 Digital banks TAR0 TAR53 1 byte Reserved checksum 1 byte checksum of al...

Page 417: ... message 334932000000 Analog channel name 3I2 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50412B000000 Analog channel name PA 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50422B000000 Analog channel name PB 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50432B000...

Page 418: ...32D000000 Analog channel name PC 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50332D000000 Analog channel name P3 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 51412D000000 Analog channel name QA 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 51422D000000 Analog ch...

Page 419: ...ernal device should request the A5C1 A5C2 and A5C3 messages The external device can then determine if the scale factors or line configuration parameters have been modified A5CE Fast Operate Configuration Block In response to the A5CE request the relay sends the following block Data Description A5CE Command 3C Length 01 Support 1 circuit breaker 0010 Support 16 remote bit set clear commands 0100 Al...

Page 420: ...RB10 29 Operate code set remote bit RB10 49 Operate code pulse remote bit RB10 0A Operate code clear remote bit RB11 2A Operate code set remote bit RB11 4A Operate code pulse remote bit RB11 0B Operate code clear remote bit RB12 2B Operate code set remote bit RB12 4B Operate code pulse remote bit RB12 0C Operate code clear remote bit RB13 2C Operate code set remote bit RB13 4C Operate code pulse r...

Page 421: ...ns assert the remote bit for one processing interval 1 4 cycle It is common practice to route remote bits to output contacts to provide remote control of the relay outputs If you wish to pulse an output contact closed for a specific duration SEL recommends using the remote bit pulse command and SELOGIC control equations to provide secure and accurate contact control The remote device sends the rem...

Page 422: ... The breaker jumper JMP2B is in place on the SEL 311A Relay main board A5CD Fast Operate Reset Definition Block In response to an A5CD request the relay sends the configuration block for the Fast Operate Reset message Data Description A5CD Command 0E Message length 01 The number of Fast Operate reset codes supported 00 Reserved for future use Per Fast Operate reset code repeat 00 Fast Operate rese...

Page 423: ...or the SEL 311A PARTNO is the part number that matches the Model Option Table number CONFIG is configuration string used for SEL internal use only The ID message is available from Access Level 1 and higher DNA Message In response to the DNA command the relay sends names of the Relay Word bits transmitted in the A5D1 message The first name is associated with the MSB the last name with the LSB These...

Page 424: ...2Q F32QG F32V 085C IN106 IN105 IN104 IN103 IN102 IN101 0AD9 ALARM OUT107 OUT106 OUT105 OUT104 OUT103 OUT102 OUT101 0FC8 04D0 04D0 04D0 51P 51PT 51PR 071A 04D0 04D0 04D0 04D0 04D0 04D0 04D0 MPP1 MABC1 MPP2 MABC2 08EE 04D0 04D0 04D0 04D0 04D0 04D0 04D0 04D0 04D0 04D0 RMB8A RMB7A RMB6A RMB5A RMB4A RMB3A RMB2A RMB1A 0E34 TMB8A TMB7A TMB6A TMB5A TMB4A TMB3A TMB2A TMB1A 0E44 RMB8B RMB7B RMB6B RMB5B RMB4...

Page 425: ...ommand the relay sends the name string of the SER SER1 SER2 SER3 settings SNS 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 50A1 OUT101 SER2 67P1T SER3 OUT102 52A the name string will be 50A1 OUT101 67P1T OUT102 52A If there are more than eight sett...

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Page 427: ...I configuration message provides data for an external computer to extract data from 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 CR COMMAND 2 ll yyyy CR h ddd ddd ddd yyyy CR D ddd ddd ddd ddd dd...

Page 428: ... 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 No Data Avail...

Page 429: ... I I I I 0AF2 CR 12H IA IB IC IP IG VA kV VB kV VC kV V1MEM VDC TRIG Names of elements in Relay Word separated by spaces YYYY CR 240D I I I I I F F F I F 2S 104S 0AC5 CR CEV R 1 021D 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 13H FREQ SAM CYC_A SAM CYC_D NUM_OF_CYC EVENT LOCATION TARGETS IA IB IC IP IG 3I2 19AA CR 1D F I I I 6S F 22S I I I...

Page 430: ...ormat by sending CST CR The relay sends STX FID yyyy CR Relay FID string yyyy CR MONTH DAY YEAR HOUR MIN SEC MSEC yyyy CR xxxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR IA IB IC IP VA VB VC VS MOF 5V_PS 5V_REG 5V_REG 12V_PS 12V_PS 15V_PS 15V_PS TEMP RAM ROM A D CR_RAM EEPROM IO_BRD yyyy CR xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxx...

Page 431: ...the Sx parameter Defaults to 16 cycles in length unless overridden with the Ly parameter C specifies 16 samples per cycle 15 cycle length The relay responds to the CEV command with the nth event report as shown below Items in bold italics will be replaced with the actual relay data STX FID yyyy CR Relay FID string yyyy CR MONTH DAY YEAR HOUR MIN SEC MSEC yyyy CR xxxx xxxx xxxx xxxx xxxx xxxx xxxx ...

Page 432: ...t does not exist the relay responds STX No Data Available 0668 CR ETX The Names of elements in the Relay Word separated by spaces field is shown below for the SEL 311A EN TRP TIME TARDT SOTF TARLOP TAR51P TAR51G A B C G ZONE1 ZONE2 TAR67P TAR67G M1P M1PT Z1G Z1GT M2P M2PT Z2G Z2GT Z1T Z2T 50P1 67P1 67P1T 50G1 67G1 67G1T 51G 51GT 51GR LOP ILOP ZLOAD ZLOUT ZLIN LB1 LB2 LB3 LB4 LB5 LB6 LB7 LB8 LB9 LB...

Page 433: ...s Labels Z1T Z2T 50P1 67P1 67P1T 50G1 67G1 67G1T Bits 0 0 0 1 0 0 0 0 In this example the 67P1 element is asserted logical 1 all others are deasserted logical 0 CSU COMMAND SEL 311A Display long summary event report in compressed ASCII format by sending CSU N EXT TERSE CSU ACK TERSE n where No parameters Output the newest chronological event summary ACK Acknowledge the oldest unacknowledged event ...

Page 434: ...IA IA_DEG IB IB_DEG IC IC_DEG IP IP_DEG IG IG_DEG 3I2 3I2_DEG VA VA_DEG VB VB_DEG VC VC_DEG 1D07 CR 200 0 31 199 120 24 200 120 16 0 29 96 2 105 04 0 0 96 131 470 0 04 131 540 120 02 131 630 119 98 1368 CR TRIG RMB8A RMB7A RMB6A RMB5A RMB4A RMB3A RMB2A RMB1A TMB8A TMB7A TMB6A TMB5A TMB4A TMB3A TMB2A TMB1A RMB8B RMB7B RMB6B RMB5B RMB4B RMB3B RMB2B RMB1B TMB8B TMB7B TMB6B TMB5B TMB4B TMB3B TMB2B TMB...

Page 435: ...nts an element being dropped out or otherwise deasserted Complete listings of Relay Word bits and their descriptions are referenced in Table 9 3 and Table 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 bits a phase time overcurrent element is examined Refer to p...

Page 436: ...rcurrent 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 Already timed out Timing to reset one cycle reset or electromechanical emulation see...

Page 437: ...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 438: ...status setting is labeled 52A See Optoisolated Inputs in Section 7 Inputs Outputs Timers and Other Control Logic and Close Logic in Section 6 Close 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 true f...

Page 439: ...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 440: ... example allow setting ER to see each transition individually Suppose a ground fault occurs and a breaker failure condition finally results Figure F 1 demonstrates the action of the rising edge operator on the individual elements in setting ER Figure F 1 Result of Rising Edge Operators on Individual Elements in Setting ER Note in Figure F 1 that setting ER sees three separate rising edges due to t...

Page 441: ...in front 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 overcurrent element ER 50G1 This allows recovery from an overcurrent condition to be observed Figure F 2 demonstrates the a...

Page 442: ... these factory settings in SHO Command Show View Settings in Section 10 Serial Port Communications and Commands If one of these torque control settings is set directly to logical 1 e g 67G1TC 1 set directly to logical 1 then the corresponding overcurrent element is subject only to the directional control See Figure 3 13 in Section 3 Distance and Overcurrent Elements for zero sequence overcurrent e...

Page 443: ...xx 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 INTERVAL The relay elements and logic and corresponding SELOGIC control equation settings and resultant Relay Word bits are processed in a predetermined order They are processed every quarter cycle 1 4 c...

Page 444: ......

Page 445: ... 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 Enable Unsolicited rep...

Page 446: ...significantly reduces communications overhead Otherwise it is necessary to enable confirmation and determine how many retries to allow and what the data 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 respons...

Page 447: ...olls and relies on unsolicited reports only Set ECLASS to a non zero value Set UNSOL Y Set NUMEVE and AGEEVE according to how often messages are desired to be sent DEVICE PROFILE The following is the device profile as specified 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...

Page 448: ...while waiting for Data Link Confirm None Fixed at Variable þ Configurable Complete Appl Fragment þ None Fixed at Variable Configurable Application Confirm None Fixed at Variable þ Configurable Complete Appl 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 A...

Page 449: ...ver þ Binary Input Change With Time Binary Input Change With Relative Time Configurable attach explanation Sends Unsolicited Responses Never þ Configurable attach explanation Only certain objects Sometimes attach explanation þ ENABLE DISABLE UNSOLICITED Function codes supported Sends Static Data in Unsolicited Responses þ Never When Device Restarts When Status Flags Change No other options are per...

Page 450: ...th Relative Time 1 6 7 8 129 17 28 10 0 Binary Output All Variations 1 0 1 6 7 8 10 1 Binary Output 10 2 Binary Output Status 1 0 1 6 7 8 129 0 1 12 0 Control Block All Variations 12 1 Control Relay Output Block 3 4 5 6 17 28 129 echo of request 12 2 Pattern Control Block 12 3 Pattern Mask 20 0 Binary Counter All Variations 1 0 1 6 7 8 20 1 32 Bit Binary Counter 20 2 16 Bit Binary Counter 20 3 32 ...

Page 451: ... 7 8 129 17 28 22 7 32 Bit Delta Counter Change Event with Time 22 8 16 Bit Delta Counter Change Event with Time 23 0 Frozen Counter Event All Variations 23 1 32 Bit Frozen Counter Event without Time 23 2 16 Bit Frozen Counter Event without Time 23 3 32 Bit Frozen Delta Counter Event without Time 23 4 16 Bit Frozen Delta Counter Event without Time 23 5 32 Bit Frozen Counter Event with Time 23 6 16...

Page 452: ...with Time 40 0 Analog Output Status All Variations 1 0 1 6 7 8 40 1 32 Bit Analog Output Status 1 0 1 6 7 8 129 0 1 7 8 40 2 16 Bit Analog Output Status 1 0 1 6 7 8 129 0 1 7 8 41 0 Analog Output Block All Variations 41 1 32 Bit Analog Output Block 3 4 5 6 17 28 129 echo of request 41 2 16 Bit Analog Output Block 3 4 5 6 17 28 129 echo of request 50 0 Time and Date All Variations 50 1 Time and Dat...

Page 453: ...different data map The following is the default object map supported by the SEL 311A wye connected PTs FID SEL 311A Rxxx VM Dxxxxxxxx Table G 3 SEL 311A Wye DNP Data Map DNP Object Type Index Description 01 02 000 499 Relay Word where TAR51G is 0 and LBOKB is 415 01 02 500 999 Relay Word from the SER encoded same as inputs 000 499 with 500 added 01 02 1000 1015 Relay front panel targets where 1015...

Page 454: ... 30 32 04 05 IC magnitude and angle 30 32 06 07 IP magnitude and angle 30 32 08 09 VA magnitude kV and angle 30 32 10 11 VB magnitude kV and angle 30 32 12 13 VC magnitude kV and angle 30 32 14 15 N A 30 32 16 17 IG magnitude and angle 30 32 18 19 I1 magnitude and angle 30 32 20 21 3I2 magnitude and angle 30 32 22 23 3V0 magnitude kV and angle 30 32 24 25 V1 magnitude kV and angle 30 32 26 27 V2 m...

Page 455: ...hot counter 30 109 111 Fault time in DNP format high middle and low 16 bits 40 41 00 Active settings group Binary inputs objects 1 and 2 are supported as defined by the previous table Binary inputs 0 499 and 1000 1023 are scanned approximately once per second to generate events When time is reported with these event objects it is the time at which the scanner observed the bit change This may be si...

Page 456: ...numbered points in 0 27 will only generate an event if in addition to their dead band check the corresponding magnitude the preceding point contains a value greater than the value given by the ANADB setting Analog inputs are scanned at approximately a 1 second rate except for analogs 103 111 During a scan all events generated will use the time the scan was initiated Analogs 103 111 are derived fro...

Page 457: ... outside of the range 1 through 6 the relay will not accept the value and will return a hardware error status Relay Summary Event Data Whenever there is unread relay event summary data fault data binary input point 1023 will be set In order to load the next available relay event summary the master should pulse binary output point 23 This will cause the event summary analogs points 103 111 to be lo...

Page 458: ...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 without a final continuation character is entered Each line of input is ...

Page 459: ... 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 dead...

Page 460: ......

Page 461: ...x and are also usable as inputs to any SELOGIC control equations Further channel status information is available via the COM command Important Do not connect an unconfigured port to a MIRRORED 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 I...

Page 462: ...ore a security counter set to two counts will delay a bit by about 1 2 power system cycle Things get a little more complicated when two relays of different processing rates are connected via MIRRORED BITS such as a SEL 321 talking to a SEL 311A The SEL 321 processes power system information each 1 8 power system cycle but processes the pickup dropout security counters as messages are received Sinc...

Page 463: ...ring Based on the results of data checks described above the relay will collect information regarding the 255 most recent communications errors Each record will contain at least the following fields Dropout Time Date Pickup Time Date Time elapsed during dropout Reason for dropout See Message Decoding and Integrity Checks Use the COMM command to generate a long or summary report of the communicatio...

Page 464: ...oltage at the EIA 232 connector for MIRRORED BITS communications using this specification The relay sets RTS to a positive voltage at the EIA 232 connector for MIRRORED BITS communications using the R6 or original R version of MIRRORED BITS SETTINGS protocol SEL LMD MBA MBB PROTO MBA Set PROTO MBA to enable the MIRRORED BITS protocol channel A on this port Set PROTO MBB to enable the MIRRORED BITS...

Page 465: ...E 6 CBADPU 1000 Use the CBADPU setting to determine the ratio of channel down time to the total channel time before the relay element CBADA is asserted The times used in the calculation are those that are available in the COMM records See the COM command in the 321 or 311A manuals for a description of the COMM records Mirrored Bits transmit identifier 1 4 TX_ID 1 Mirrored Bits receive identifier 1...

Page 466: ...ored Bits RMB_ Debounce DO msgs 1 8 RMB4DO 1 Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB5PU 1 Mirrored Bits RMB_ Debounce DO msgs 1 8 RMB5DO 1 Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB6PU 1 Mirrored Bits RMB_ Debounce DO msgs 1 8 RMB6DO 1 Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB7PU 1 Mirrored Bits RMB_ Debounce DO msgs 1 8 RMB7DO 1 Mirrored Bits RMB_ Debounce PU msgs 1 8 RMB8PU 1 Mirrored Bit...

Page 467: ...a streams MAKE SEQUENTIAL EVENTS RECORDER SER SETTINGS WITH CARE The relay triggers a row in the Sequential Events Recorder SER event report for any change of state in any one of the elements listed in the SER1 SER2 or SER3 trigger settings Nonvolatile memory is used to store the latest 512 rows of the SER event report so they can be retained during power loss The nonvolatile memory is rated for a...

Page 468: ...d for future use in multiple frame messages XX Response number XX 00 01 02 03 00 01 18 Function to enable 18 unsolicited Fast SER messages 0000 Reserved for future use as function code data nn Maximum number of SER records per message 01 20 hex cccc Two byte CRC 16 check code for message The SEL 311A Relay verifies the message by checking the header length function code and enabled function code a...

Page 469: ...multiple frame messages XX Response number XX 00 01 02 03 01 02 18 Function to disable 18 Unsolicited Fast SER 00 Reserved for future use as function code data cccc Two byte CRC 16 check code for message The SEL 311A Relay verifies the message by checking the header length function code and disabled function code against the expected values and checks the entire message against the CRC 16 field If...

Page 470: ...02 00000000 Four bytes reserved for future use as a return routing address dddd Two byte day of year 1 366 yyyy Two byte four digit year e g 1999 or 07CF hex mmmmmmmm Four byte time of day in milliseconds since midnight XX 1st element index match with the response to the SNS command 00 for 1st element 01 for second element and so on uuuuuu Three byte time tag offset of 1st element in microseconds ...

Page 471: ... hex of overflow message generation mmmmmmmm Four byte time of day in milliseconds since midnight FFFFFFFE Four byte end of records flag 00000000 Element status unused cccc Two byte CRC 16 checkcode for message Acknowledge Message Sent from Master to Relay and from Relay to Master The acknowledge message is constructed and transmitted for every received message which contains a status byte with th...

Page 472: ...ed A5 46 10 00 00 00 00 00 01 02 C0 XX 18 00 cc cc XX 0 1 2 3 4 Successful acknowledge from the relay for the Disable Unsolicited Data Transfer message A5 46 0E 00 00 00 00 00 00 82 00 XX cc cc XX is as same as the response number in the Disable Unsolicited Data Transfer message to which it responds 5 Successful acknowledge message from the master for a Fast SER message A5 46 0E 00 00 00 00 00 00 ...

Page 473: ...rement the response number it will wrap around to zero from three A single SER message packet from the relay can have a maximum number 32 records and the data may span a time period of no more than 16 seconds The master may limit the number records in a packet with the third byte of function code data in the Enable Unsolicited Data Transfer message function code 01 The relay may generate a Fast SE...

Page 474: ......

Page 475: ...r if Date Format setting DATE_F MDY DAT y m d Enter date in this manner if Date Format setting DATE_F YMD EVE n Show event report number n with 1 4 cycle resolution EVE L n Show event report number n with 1 16 cycle resolution EVE R n Show raw event report number n with 1 16 cycle resolution EVE C n Show compressed event report number n for use with SEL 5601 Analytic Assistant GRO Display active g...

Page 476: ...or k 1 30 seconds Parameter n must be specified k defaults to 1 if not specified Access Level 2 Commands The Access Level 2 commands allow unlimited access to relay settings parameters and output contacts All Access Level 1 and Access Level B commands are available from Access Level 2 The screen prompt is CON n Control Remote Bit RBn Remote Bit n n 1 8 Execute CON n and the relay responds CONTROL ...

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