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Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

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Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual Download Page 629

F.7

Date Code 20070117

Instruction Manual

SEL-351-5, -6, -7 Relay

Setting Negative-Sequence Overcurrent Elements

Coordinating Negative-Sequence Overcurrent Elements

element, whether it operates faster or slower than its complementary ground 
overcurrent element, will operate faster than the upstream negative-sequence 
overcurrent element for all faults, including those that involve ground.

Summary of Contents for SEL-351-5

Page 1: ...20070117 SEL 351 5 6 7 Relay Directional Overcurrent Relay Reclosing Relay Fault Locator Integration Element Standard Instruction Manual PM351 02 NB ...

Page 2: ...les usagées suivant les instructions du fabricant ATTENTION Au risque de causer des dommages à l équipement ne jamais appliquer un signal de tension supérieur à 9 V crête à crête à l interface de test de bas niveau J10 ATTENTION Cet appareil est expédié avec des mots de passe par défaut A l installation les mots de passe par défaut devront être changés pour des mots de passe confidentiels Dans le ...

Page 3: ...ilable in Firmware Version 7 3 51 Power Elements Available in Firmware Version 7 3 56 Section 4 Loss of Potential Load Encroachment and Directional Element Logic Loss of Potential Logic 4 1 Load Encroachment Logic 4 4 Directional Control for Neutral Ground and Residual Ground Overcurrent Elements 4 9 Directional Control for Negative Sequence and Phase Overcurrent Elements 4 30 Directional Control ...

Page 4: ... 37 Settings Sheets 9 45 SET Section 10 Serial Port Communications and Commands Overview 10 1 Port Connector and Communications Cables 10 2 Communications Protocol 10 6 Serial Port Automatic Messages 10 9 Serial Port Access Levels 10 10 Command Summary 10 12 Command Explanations 10 14 SEL 351 5 6 7 Relay Command Summary Section 11 Front Panel Interface Overview 11 1 Front Panel Pushbutton Operatio...

Page 5: ...CHISTORY Command SEL 351 E 6 CEVENT Command SEL 351 E 7 Appendix F Setting Negative Sequence Overcurrent Elements Setting Negative Sequence Definite Time Overcurrent Elements F 1 Setting Negative Sequence Time Overcurrent Elements F 2 Coordinating Negative Sequence Overcurrent Elements F 3 Other Negative Sequence Overcurrent Element References F 8 Appendix G Setting SELOGIC Control Equations Overv...

Page 6: ...LERATOR QuickSet SEL 5030 Software Introduction K 1 ACSELERATOR QuickSet System Requirements K 2 Installation K 3 Starting ACSELERATOR QuickSet Software K 4 Appendix L SEL Synchrophasors Overview L 1 Introduction L 2 Synchrophasor Measurement L 3 External Equipment Compensation L 4 Protocol Operation L 5 Settings L 8 Synchrophasor Relay Word Bits L 11 View Synchrophasors by Using the MET PM Comman...

Page 7: ... 4 3 56 Table 3 15 Three Phase Power Element Settings and Setting Ranges EPWR 3P1 3P2 3P3 or 3P4 3 56 Table 4 1 Available Ground Directional Elements 4 11 Table 4 2 Best Choice Ground Directional Logic 4 12 Table 4 3 Ground Directional Element Availability by Voltage Connection Settings 4 13 Table 4 4 Overcurrent Elements Controlled by Level Direction Settings DIR1 Through DIR4 Corresponding Overc...

Page 8: ...s 12 5 Table 12 2 Standard Event Report Current Voltage and Frequency Columns 12 9 Table 12 3 Output Input and Protection and Control Element Event Report Columns 12 11 Table 12 4 SSI Element Status Columns 12 35 Table 12 5 Status SSI Column 12 35 Table 13 1 Helpful Commands for Relay Testing 13 4 Table 13 2 Resultant Scale Factors for Input Module 13 5 Table 13 3 Relay Self Tests 13 8 Table 13 4 ...

Page 9: ...18 Message Format J 5 Table J 4 Acknowledge Message Format J 7 Table J 5 SEL 351 Response Codes J 7 Table L 1 SEL Fast Message Protocol Format L 5 Table L 2 Unsolicited Fast Message Enable Packet L 6 Table L 3 Unsolicited Fast Message Disable Packet L 6 Table L 4 Permissible Message Periods Requested by Enable Message L 7 Table L 5 SEL 351 Global Settings for Synchrophasors L 8 Table L 6 SEL 351 S...

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Page 11: ...tribution Bus Overcurrent Protection Includes Fast Bus Trip Scheme Wye Connected PTs 2 20 Figure 2 12 Transmission Line Directional Overcurrent Protection and Reclosing Wye Connected PTs 2 21 Figure 2 13 Transmission Line Directional Overcurrent Protection and Reclosing Current Polarization Source Connected to Channel IN Wye Connected PTs 2 22 Figure 2 14 Delta Wye Transformer Bank Overcurrent Pro...

Page 12: ... to Phase Voltage Elements Delta Connected PTs 3 30 Figure 3 24 Sequence Voltage Elements Delta Connected PTs 3 30 Figure 3 25 Channel VS Voltage Elements Wye or Delta Connected PTs 3 31 Figure 3 26 Synchronism Check Voltage Window and Slip Frequency Elements 3 36 Figure 3 27 Synchronism Check Elements 3 37 Figure 3 28 Angle Difference Between VP and VS Compensated by Breaker Close Time fP fS and ...

Page 13: ...o Sequence Impedance Network for Ground Fault on Feeder 1 4 51 Figure 4 28 Wattmetric Element Operation for Ground Fault on Feeder 1 4 52 Figure 5 1 Trip Logic 5 2 Figure 5 2 Minimum Trip Duration Timer Operation See Bottom of Figure 5 1 5 3 Figure 5 3 Three Pole Open Logic Top and Switch Onto Fault Logic Bottom 5 7 Figure 5 4 Communications Assisted Tripping Scheme 5 10 Figure 5 5 Permissive Inpu...

Page 14: ...le Timer SV8T Used in Setting Group Switching 7 21 Figure 7 21 Active Setting Group Switching With Single Input Time Line 7 23 Figure 7 22 Rotating Selector Switch Connected to Inputs IN101 IN102 and IN103 for Active Setting Group Switching 7 24 Figure 7 23 Active Setting Group Switching With Rotating Selector Switch Time Line 7 26 Figure 7 24 SELOGIC Control Equation Variables Timers SV1 SV1T Thr...

Page 15: ...Resolution Wye Connected PTs 12 28 Figure 12 4 Example Partial Event Report with Delta Connected PTs 12 29 Figure 12 5 Derivation of Event Report Current Values and RMS Current Values From Sampled Current Waveform 12 30 Figure 12 6 Derivation of Phasor RMS Current Values From Event Report Current Values 12 31 Figure 12 7 Example Sequential Events Recorder SER Event Report 12 32 Figure 12 8 Example...

Page 16: ...Derived from Equivalent Phase Overcurrent Element 51EP F 6 Figure G 1 Result of Rising Edge Operators on Individual Elements in Setting ER G 7 Figure G 2 Result of Falling Edge Operator on a Deasserting Underfrequency Element G 8 Figure L 1 Phase Reference L 3 Figure L 2 Waveform at Relay Terminals May Have a Phase Shift L 4 Figure L 3 Correction of Measured Phase Angle L 4 Figure L 4 Sample MET P...

Page 17: ...ruption elements in Firmware Version 7 Section 4 Loss of Potential Load Encroachment and Directional Element Logic Describes the operation of loss of potential logic and its effect on directional elements load encroachment logic and its application to phase overcurrent elements voltage polarized and current polarized directional elements including directional control for low impedance grounded Pet...

Page 18: ...ables communications protocol and serial port commands See SHO Command Show View Settings on page 10 26 for a list of the factory default settings the SEL 351 ships within a standard relay shipment SEL 351 5 6 7 Relay Command Summary Briefly describes the serial port commands that are described in detail in Section 10 Serial Port Communications and Commands Section 11 Front Panel Interface Describ...

Page 19: ...bering This manual shows page identifiers at the top of each page see the figure below Page Number Format The page number appears at the outside edge of each page a vertical bar separates the page number from the page title block The page numbers of the SEL 351 Relay Instruction Manual are represented by the following building blocks Section number Actual page number in the particular section The ...

Page 20: ...e examples may not necessarily match those in the current version of your SEL 351 Typographic Conventions Example Description STATUS Commands typed at a command line interface on a PC Enter Single keystroke on a PC keyboard Ctrl D Multiple combination keystroke on a PC keyboard Start Settings PC software dialog boxes and menu selections The character indicates submenus CLOSE Relay front panel push...

Page 21: ...lows Indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury or equipment damage CAUTION Indicates a potentially hazardous situation that if not avoided could result in death or serious injury WARNING Indicates an imminently hazardous situation that if not avoided will result in death or serious injury DANGER ...

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Page 23: ...truction Manual Introduction and Specifications This section includes the following overviews of the SEL 351 Relay SEL 351 Models on page 1 2 Applications on page 1 5 Hardware Connection Features on page 1 6 Communications Connections on page 1 12 Specifications on page 1 13 ...

Page 24: ...ons 0 2 A or 0 05 A nominal Table 4 1 and accompanying note show the particular ground directional elements available with different options of the neutral channel IN current input The 0 05 A nominal neutral channel IN current input option is a legacy nondirectional sensitive earth fault SEF option the 0 2 A nominal neutral channel IN current input option can provide the same SEF function and addi...

Page 25: ... harmonics However the bipolar peak detector has the best performance in situations of severe CT saturation when the cosine filter magnitude estimation is significantly degraded Combining the two filters provides an elegant solution for ensuring dependable phase instantaneous overcurrent element operation PotentialTransformer Connections Firmware revisions prior to R308 inclusive operate with wye ...

Page 26: ...voltage connection to be used in the zero sequence voltage polarized ground directional elements See Potential Transformer Inputs for details on the broken delta connection and other relay elements that are affected by setting VSCONN 3V0 The connection type setting wye or delta does not affect the voltage input rating of the relay voltage terminals For example a relay with 300 Vac voltage inputs c...

Page 27: ...tection w Transmission Line Protection and Reclosing q Line Recloser Installations Core Balance Current Transformer N N Trip ABC ABC Distribution Bus Fast Bus Trip Scheme The SEL 351R Recloser Control is a similar product to the SEL 351 Utility Distribution Feeder Protection and Reclosing r Industrial Distribution Feeder Protection t 52 Trip and Close ABC ABC ABC Transmission Bus Comm Equip TX RX ...

Page 28: ... Firmware revisions numbered R309 or higher can be configured via global setting PTCONN to accept either wye line to neutral or delta line to line voltages using the open delta connection The relay rear panel markings and the internal connections of terminals Z09 Z12 are not changed See Potential Transformer Inputs on page 2 12 for details on the open delta connection Auxiliary Voltage Channel VS ...

Page 29: ...BLE IN 105 106 IN IN 103 IN 104 102 IN 101 IN A28 A27 A26 A25 A24 A23 A22 A21 A20 A19 A18 A17 Z06 Z08 Z07 Z01 Z05 Z04 Z03 Z02 Z26 Z25 Z14 Z13 Z12 Z11 Z10 Z09 IA IB IC IN VA VB VC N VS NS PROGRAMMABLE OPTOISOLATED INPUTS CURRENT INPUTS VOLTAGE INPUTS Z27 POWER SUPPLY BATTERY MONITOR CHASSIS GROUND A16 A13 A14 A15 A11 A12 A05 A08 A10 A09 A06 A07 A03 A04 A02 A01 OUT101 OUT102 OUT103 OUT104 OUT105 OUT...

Page 30: ...ntacts If the output contacts are high current interrupting output contacts they are polarity dependent See Table 1 1 for information on SEL 351 models with the high current interrupting output contact option See Output Contacts on page 2 10 for more information on the polarity dependence of high current interrupting output contacts ...

Page 31: ...Shown in Figure 1 2 OUT208 OUT207 OUT206 OUT205 OUT204 OUT203 OUT202 OUT201 B01 B02 B04 B03 B07 B06 B09 B10 B08 B05 B12 B11 B15 B14 B13 B16 PROGRAMMABLE OPTOISOLATED INPUTS B25 B26 B27 B28 B29 B30 B31 B32 B33 B34 B35 B36 OUT210 OUT209 OUT211 B22 B21 B20 B19 B18 B17 OUT212 B24 B23 B40 B39 B38 B37 JUMPER CONFIGURABLE PROGRAMMABLE OUTPUT CONTACTS IN 201 IN 202 IN 203 IN 204 IN 205 IN 206 IN 207 IN 20...

Page 32: ...ntacts If the output contacts are high current interrupting output contacts they are polarity dependent See Table 1 1 for information on SEL 351 models with the high current interrupting output contact option See Output Contacts on page 2 10 for more information on the polarity dependence of high current interrupting output contacts ...

Page 33: ...d Shown in Figure 1 2 OUT208 OUT207 OUT206 OUT205 OUT204 OUT203 OUT202 OUT201 B01 B02 B04 B03 B07 B06 B09 B10 B08 B05 B12 B11 B15 B14 B13 B16 PROGRAMMABLE OPTOISOLATED INPUTS B25 B26 B27 B28 B29 B30 B31 B32 B33 B34 B35 B36 OUT210 OUT209 OUT211 B22 B21 B20 B19 B18 B17 OUT212 B24 B23 B40 B39 B38 B37 JUMPER CONFIGURABLE PROGRAMMABLE OUTPUT CONTACTS IN 201 IN 202 IN 203 IN 204 IN 205 IN 206 IN 207 IN ...

Page 34: ...rial port Connect to the SEL communications processor once and communicate with any connected SEL relay Data And Time Synchronization Connections Local Connections EIA 485 Connections Port F Port F Port 2 Port 2 Front Panel Rear Panel Front Panel SEL 2032 SEL 351 Relay 1 Optical Cable Connection Metallic Cable Connection Port 1 Port 1 Computer Port 1 Fiber Optic Cable C273AFZ or C273AFD SEL 2810 P...

Page 35: ...el IN current input 1 5 A continuous 20 A for 1 second linear to 1 5 A symmetrical 100 A for 1 cycle Burden 0 0004 VA 0 05 A 0 36 VA 1 5 A Note The 0 2 A nominal neutral channel IN option is used for directional control on low impedance grounded Petersen Coil grounded and ungrounded high impedance grounded systems see Table 4 1 The 0 2 A nominal channel can also provide non directional sensitive e...

Page 36: ...r with 2100 Vdc of isolation Per Port Baud Rate Selections 300 1200 2400 4800 9600 19200 38400 38400 is not available on PORT 1 Dimensions Refer to Figure 2 1 Weight 13 lbs 5 92 kg 2U rack unit height relay 16 lbs 7 24 kg 3U rack unit height relay Operating Temperature 40 to 185 F 40 to 85 C LCD contrast impaired for temperatures below 20ºC Type Tests Environmental Tests Cold IEC 60068 2 1 1990 Ba...

Page 37: ...ff frequency of 560 Hz Digital Filtering One cycle cosine after low pass analog filtering Net filtering analog plus digital rejects dc and all harmonics greater than the fundamental Protection and Control Processing 4 times per power system cycle Relay Element Pickup Ranges and Accuracies Instantaneous Definite Time Overcurrent Elements Pickup Range 0 25 100 00 A 0 01 A steps 5 A nominal 1 00 170 ...

Page 38: ... 0 500 Hz 0 001 Hz steps Slip Frequency Pickup Accuracy 0 003 Hz Phase Angle Range 0 80 1 steps Phase Angle Accuracy 4 Under and Overfrequency Elements Pickup Range 40 10 65 00 Hz 0 01 Hz steps Steady State plus Transient Overshoot 0 01 Hz Time Delay 2 00 16 000 00 cycles 0 25 cycle steps Timer Accuracy 0 25 cycle and 0 1 of setting Undervoltage Frequency Element Block Range 12 50 150 00 VLN wye o...

Page 39: ...A 5 A nominal 0 07 0 4 VA 1 A nominal 0 05 A L N voltage secondary and 10 of setting at unity power factor for power elements and zero power factor for reactive power element 5 A nominal 0 01 A L N voltage secondary and 10 of setting at unity power factor for power elements and zero power factor for reactive power element 1 A nominal Pickup setting 2 13000 VA 5 A nominal 0 4 2600 VA 1 A nominal 0 ...

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Page 41: ...nstallation Overview Design your installation using the mounting and connection information in this section Options include rack or panel mounting and terminal block or plug in connector Connectorized wiring This section also includes information on configuring the relay for your application ...

Page 42: ...it Panel Mount We also offer the SEL 351 in a panel mount version for a clean look Panel mount relays have sculpted front panel molding that covers all installation holes See Figure 2 1 Cut your panel and drill mounting holes according to the dimensions in Figure 2 1 Insert the relay into the cutout aligning four relay mounting studs on the rear of the relay front panel with the drilled holes in y...

Page 43: ...2 3 Date Code 20070117 Instruction Manual SEL 351 5 6 7 Relay Installation Relay Mounting Figure 2 1 Dimensions for Rack Mount and Panel Mount Models ...

Page 44: ...ifferent relay configurations All 3U rack height units can be ordered with terminal block plug in connectors or extra I O All 2 U rack height SEL 351 5 6 7 models are equipped with terminal blocks only Other members of the SEL 351 family may be available in a 2 U rack height with plug in connectors For model options view the SEL 351 Model Option Tables on our website or contact your local SEL sale...

Page 45: ...070117 Instruction Manual SEL 351 5 6 7 Relay Installation Front Panel and Rear Panel Connection Diagrams Figure 2 2 Front and Rear Panel Drawings Model 0351x0 Rear and Model 0351x0H Front Horizontal Rack Mount Example ...

Page 46: ...ront Panel and Rear Panel Connection Diagrams Figure 2 3 Front and Rear Panel Drawings Model 0351x1xxxxx2 Rear and Models 0351x1H and 0351xYH Front Horizontal Rack Mount Example Rear panel drawing shows standard output contacts on extra I O board terminals no polarity markings ...

Page 47: ...d Rear Panel Connection Diagrams Figure 2 4 Front and Rear Panel Drawings Model 0351xYxxxxx6 Rear and Models 0351x14 and 0351xY4 Front Vertical Panel Mount Example Rear panel drawing shows high current interrupting output contacts on extra I O board terminals with polarity markings Top Top ...

Page 48: ... factory Refer to the SEL WA0351xY Model Option Tables which are available from the factory The SEL WA0351xY Wiring Harness includes the following connectors not prewired 2 8 position female plug in connectors for output contacts OUT101 ALARM 2 6 position female plug in connectors for optoisolated inputs IN101 IN106 1 8 position female plug in connector for EIA 485 IRIG B SERIAL PORT 1 4 6 positio...

Page 49: ...S 1 connector for POWER inputs and 1 spade connector for GROUND connection chassis ground These prewired connectors and the serial port connector are unique and may only be installed in one orientation Figure 2 5 Plug In Connector Coding Top View Model 0351xY IN104 IN106 IN101 IN103 A23 A27 A28 A25 A26 A24 A22 A20 A21 A18 A19 A17 OUT105 ALARM OUT101 OUT104 A13 A15 A16 A14 A11 A12 A10 A06 A08 A09 A...

Page 50: ...nd to the switching power supply The control power circuitry is isolated from the relay chassis ground Plug the power supply connector into terminals Z25 and Z26 The connector locks in place upon insertion Refer to Section 1 Introduction and Specifications for power supply ratings The relay power supply rating is listed on the serial number sticker on the relay rear panel Models 0351x0 and 0351x1 ...

Page 51: ...current interrupting output contacts on the extra I O board OUT201 OUT212 0351x1H42546X1 0351xYH42546X1 High current interrupting output contacts are polarity dependent Note the polarity markings above even numbered terminals B02 B04 B06 B24 in Figure 2 4 The extra I O board of the Model 0351x1 relay in Figure 2 3 does not show these polarity markings because it is the rear panel for an extra I O ...

Page 52: ...gs 5 A or 1 A for the phase IA IB IC and neutral IN current inputs listed under label AMPS AC The neutral IN current input also has the 0 05 A and 0 2 A nominal current options The selection of the neutral current input rating is often determined by the desired ground directional element see Table 4 1 and accompanying note Models 0351x0 and 0351x1 Note the polarity dots above terminals Z01 Z03 Z05...

Page 53: ...bal Setting PTCONN WYE Any of the single phase voltage inputs i e VA N VB N VC N or VS NS can be connected to voltages up to 150 V or 300 V see Table 1 2 continuous Figure 2 10 Figure 2 15 and Figure 2 18 Figure 2 20 show examples of wye connected voltages Frequency is determined from the voltages connected to terminals VA N and VS NS see Synchronism Check Elements on page 3 33 and Frequency Eleme...

Page 54: ...tting VSCONN is not actually available in these relays Broken Delta VS Connection Global Setting VSCONN 3V0 In SEL 351 5 6 7 relays with firmware revision R309 or higher global setting VSCONN 3V0 adjusts the relay to accept a 3V0 zero sequence voltage signal connected to voltage input VS This signal is usually derived from PTs connected wye primary broken delta secondary VS VA VB VC 3V0 This signa...

Page 55: ...o Voltage Input VS Wye Connected PTs To verify the correct polarity on voltage input VS perform the following test on the primary side of one of the PTs connected in broken delta secondary refer to Figure 2 6 and observe the resultant voltage phase angle differences Open circuit the primary side of the PT connected to power system phase A With the resultant collapse of secondary voltage VA VA 0 in...

Page 56: ...ithin a few degrees then the secondary wires from the broken delta secondary in Figure 2 6 need to be swapped in connection to terminals VS NS Figure 2 7 Resultant Voltage VS from the Collapse of Voltage VA in the Broken Delta Secondary Compared to the Wye Connected Power System Voltages Delta Connected PT Example Figure 2 8 Broken Delta Secondary Connection to Voltage Input VS Delta Connected PTs...

Page 57: ...grees Figure 2 9 Resultant Voltage VS from the Collapse of Voltage VA in the Broken Delta Secondary Compared to the Delta Connected Power System Voltages Serial Ports Refer to Table 10 1 for information on the serial ports available on the different SEL 351 models All ports are independent you can communicate to any combination simultaneously SERIAL PORT 1 on all the SEL 351 models is an EIA 485 p...

Page 58: ...as the SEL 2407 or SEL 2401 Satellite Synchronized Clock A demodulated IRIG B time code can be input into SERIAL PORT 2 on any of the SEL 351 models see Table 2 2 This is handled adeptly by connecting SERIAL PORT 2 of the SEL 351 to an SEL 2032 SEL 2030 SEL 2020 or SEL 2100 with Cable C273A A demodulated IRIG B time code can be input into the connector for SERIAL PORT 1 on models 0351x0 0351x1 and...

Page 59: ...roken Delta VS Connection Global Setting VSCONN 3V0 on page 2 14 Current Channel IN does not need to be connected Channel IN provides current IN for the neutral ground overcurrent elements Separate from Channel IN the residual ground overcurrent elements operate from the internally derived residual current IG IG 3I0 IA IB IC But in this residual connection example the neutral ground and residual g...

Page 60: ...nel IN provides current IN for the neutral ground overcurrent elements Separate from Channel IN the residual ground overcurrent elements operate from the internally derived residual current IG IG 3I0 IA IB IC But in this residual connection example the neutral ground and residual ground overcurrent elements operate the same because IN IG Although automatic reclosing is probably not needed in this ...

Page 61: ...lements Separate from Channel IN the residual ground overcurrent elements operate from the internally derived residual current IG IG 3I0 IA IB IC But in this residual connection example the neutral ground and residual ground overcurrent elements operate the same because IN IG Figure 2 12 Transmission Line Directional Overcurrent Protection and Reclosing Wye Connected PTs TC Trip Coil 52A Trip Circ...

Page 62: ...used to control ground overcurrent elements Separate from Channel IN the residual ground overcurrent elements operate from the internally derived residual current IG IG 3I0 IA IB IC Figure 2 13 Transmission Line Directional Overcurrent Protection and Reclosing Current Polarization Source Connected to Channel IN Wye Connected PTs TC Trip Coil 52A Trip Circuit IA C B A N VC VB SEL 351 RELAY VA OUT10...

Page 63: ... with desired supervision e g hot bus check For sensitive earth fault SEF applications the SEL 351 should be ordered with channel IN rated at 0 2 A or 0 05 A nominal See current input specifications in General on page 1 13 See neutral ground overcurrent element pickup specifications in Section 3 Overcurrent Voltage Synchronism Check Frequency and Power Elements See also the note following Table 4 ...

Page 64: ...ed in this example output contact OUT102 can close the circuit breaker via initiation from various means serial port communications optoisolated input assertion etc with desired supervision e g hot bus check Figure 2 15 Overcurrent Protection for a Transformer Bank With a Tertiary Winding Wye Connected PTs TC Trip Coil 52A Trip Circuit IA C B A N VC VB SEL 351 RELAY VA OUT101 Forward Tripping Dire...

Page 65: ... supervision For sensitive earth fault SEF applications the SEL 351 should be ordered with channel IN rated at 0 2 A or 0 05 A nominal See current input specifications in General on page 1 13 See neutral ground overcurrent element pickup specifications in Section 3 Overcurrent Voltage Synchronism Check Frequency and Power Elements See also the note following Table 4 1 Figure 2 16 Industrial Distri...

Page 66: ...nt elements operate from the internally derived residual current IG IG 3I0 IA IB IC But in this residual connection example the neutral ground and residual ground overcurrent elements operate the same because IN IG Figure 2 17 Dedicated Breaker Failure Protection TC Trip Coil 52A Retrip Circuit IA C B A SEL 351 RELAY OUT101 Forward Tripping Direction 86 Lock Out 86B Breaker Failure Trip Circuit IB...

Page 67: ...ance grounded system is selected with setting ORDER U see Table 4 1 Table 4 3 Nondirectional sensitive earth fault SEF protection is also available Figure 2 18 Overcurrent Protection for a High Impedance or Low Impedance Grounded System Wye Connected PTs TC Trip Coil 52A Trip Circuit IA C B A N VC VB SEL 351 RELAY VA OUT101 Forward Tripping Direction CC Close Coil 52B Close Circuit IB OUT102 86 Lo...

Page 68: ...R containing P see Table 4 1 Table 4 3 Nondirectional sensitive earth fault SEF protection is also available Figure 2 19 Petersen Coil Grounded System Overcurrent Protection Wye Connected PTs TC Trip Coil 52A 52A Trip Circuit IA C B A N VC VB SEL 351 RELAY VA OUT101 Forward Tripping Direction Core Balance CT CC Close Coil 52B Close Circuit IB OUT102 86 Lock Out 86B Breaker Failure Trip Circuit IC ...

Page 69: ...ng ORDER U see Table 4 1 Table 4 3 Nondirectional sensitive earth fault SEF protection is also available Figure 2 20 Ungrounded System Overcurrent Protection Wye Connected PTs TC Trip Coil 52A 52A Trip Circuit IA C B A N VC VB SEL 351 RELAY VA OUT101 Forward Tripping Direction Core Balance CT CC Close Coil 52B Close Circuit IB OUT102 86 Lock Out 86B Breaker Failure Trip Circuit IC OUT103 FEEDER A ...

Page 70: ...r and connecting to relay terminal VS NS Z13 and Z14 respectively To use this connection make global setting VSCONN 3V0 Make group setting PTRS as shown in Section 9 Setting the Relay The step down transformer is required when the maximum expected residual voltage exceeds the relay voltage channel rating See Determining Voltage Input Rating on page 2 13 The polarity of the VS NS connection should ...

Page 71: ...70 degrees lagging VAB with ABC rotation See Synchronism Check Elements on page 3 33 Current Channel IN does not need to be connected Channel IN provides current IN for the neutral ground overcurrent elements Separate from Channel IN the residual ground overcurrent elements operate from the internally derived residual current IG IG 3I0 IA IB IC But in this residual connection example the neutral g...

Page 72: ...it is shown connected for use in voltage and synchronism check elements and voltage metering See Synchronism Check VS Connection Global Setting VSCONN VS on page 2 14 and Broken Delta VS Connection Global Setting VSCONN 3V0 on page 2 14 Current Channel IN does not need to be connected Channel IN provides current IN for the neutral ground overcurrent elements Separate from Channel IN the residual g...

Page 73: ... removal of the main board because the LCD on the main board is in the way Step 6 Disconnect circuit board cables as necessary to allow the desired board and drawout tray to be removed Removal of the extra I O board requires removal of the main board first Ribbon cables can be removed by pushing the extraction ears away from the connector The six conductor power cable can be removed by grasping th...

Page 74: ...1xY C μ Optoisolated Inputs Pushbuttons LCD Contrast Adjust LEDs J1 A U46 Serial Port F EIA 232 Serial Port 3 EIA 232 Serial Port 2 EIA 232 Serial Port 1 EIA 485 J7 R131 Analog Connector Clock Battery B1 J8 J9 J10 Power I O Connector B C D JMP1 JMP23 JMP21 JMP22 JMP25 JMP26 JMP27 JMP29 Output Contacts JMP6 ALARM OUT101 OUT102 OUT103 OUT104 OUT105 OUT106 OUT107 JMP2 JMP2 JMP2 B A B A B A B A B A B ...

Page 75: ...on Circuit Board Connections Figure 2 25 Jumper Connector and Major Component Locations on the Extra I O Board Models 0351xY Plug In Connector Version Output Contacts JMP20 OUT209 OUT210 OUT212 OUT211 JMP18 JMP19 JMP17 Power I O Connector Optoisolated Inputs A B A B A B A B ...

Page 76: ...act is an a type output contact An a type output contact is open when the output contact coil is de energized and closed when the output contact coil is energized With a jumper in the B position the corresponding output contact is a b type output contact A b type output contact is closed when the output contact coil is de energized and open when the output contact coil is energized These jumpers a...

Page 77: ...tput contact next to the dedicated ALARM output contact can be converted to operate as an extra alarm output contact by moving a jumper on the main board see Table 2 3 The position of the jumper controls the operation of the output contact next to the dedicated ALARM output contact With the jumper in one position the output contact operates regularly With the jumper in the other position the outpu...

Page 78: ...ntact OUT107 operated by Relay Word bit OUT107 Jumper JMP23 comes in this position in a standard relay shipment see Figure 7 27 Extra Alarm output contact operated by alarm logic cir cuitry Relay Word bit OUT107 does not have any effect on out put contact OUT107 when jumper JMP23 is in this position see Figure 7 27 JMP23 3 2 1 JMP23 3 2 1 Table 2 5 Password and Breaker Jumper Positions for Standar...

Page 79: ...lly operate for 10 years at rated load If the dc source is lost or disconnected the battery powers the clock When the relay is powered from an external source the battery only experiences a low self discharge rate Thus battery life can extend well beyond the nominal 10 years because the battery rarely has to discharge after the relay is installed The battery cannot be recharged If the relay does n...

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Page 81: ...cking schemes see Directional Comparison Blocking DCB Logic on page 5 26 All the other phase instantaneous definite time overcurrent elements are available for use in any tripping or control scheme Settings Ranges Setting range for pickup settings 50P1P 50P6P 0 25 100 00 A secondary 5 A nominal phase current inputs IA IB IC 0 05 20 00 A secondary 1 A nominal phase current inputs IA IB IC Setting r...

Page 82: ... 3 1 and Figure 3 2 The pickup settings for each level 50P1P 50P6P are compared to the magnitudes of the individual phase currents IA IB and IC The logic outputs in Figure 3 1 and Figure 3 2 are Relay Word bits and operate as follows Level 1 example shown Level 1 Setting E5OP 1 Level 2 Setting E5OP 2 Level 3 Setting E5OP 3 Level 4 Setting E5OP 4 50P1P 50P2P 50P3P Settings 50P1 50A1 50B1 50C1 50P2 ...

Page 83: ...ements 67P1 67P4 will display in an organized fashion in event reports see Figure 3 3 and Table 12 3 50A1 1 logical 1 if IA pickup setting 50P1P 0 logical 0 if IA pickup setting 50P1P 50B1 1 logical 1 if IB pickup setting 50P1P 0 logical 0 if IB pickup setting 50P1P 50C1 1 logical 1 if IC pickup setting 50P1P 0 logical 0 if IC pickup setting 50P1P 50P1 1 logical 1 if at least one of the Relay Word...

Page 84: ...bled Levels 67P1 67P1T q 50P1 67P1TC SELOGIC Setting 67P1D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control w Level 1 Level 1 Setting E5OP 1 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control 67P3 67P3T q 50P3 Relay Word Bit 67P3TC SELOGIC Setting 67P3D 0 w Level 3 Level 3 Setting E5OP 3 Directional Control asserted to log...

Page 85: ...ue control settings 67P1TC 67P4TC SELOGIC control equation torque control settings cannot be set directly to logical 0 The following are torque control setting examples for Level 1 phase instantaneous definite time overcurrent elements 67P1 67P1T 67P1TC 1 Setting 67P1TC set directly to logical 1 Then only the corresponding directional control input from Figure 4 19 has to be considered in the cont...

Page 86: ...s applicable to all nondirectional instantaneous overcurrent elements in the SEL 351 Relay 60 Hz or 50 Hz relays These times do not include output contact operating time and thus are accurate for determining element operation time for use in internal SELOGIC control equations Output contact pickup dropout time is approximately 4 ms 0 25 cycle for a 60 Hz relay 0 20 cycle for a 50 Hz relay If insta...

Page 87: ...C 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 Pickup Operation The pickup settings for each level 50PP1P 50PP4P are compared to the magnitudes of the individual phase to phase difference currents IAB IBC and ICA The logic outputs in Figure 3 7 are the following Relay Word bit...

Page 88: ...s see Directional Comparison Blocking DCB Logic on page 5 26 All the other neutral ground instantaneous definite time overcurrent elements are available for use in any tripping or control scheme To understand the operation of Figure 3 8 and Figure 3 9 follow the explanation given for Figure 3 1 Figure 3 2 and Figure 3 3 in Phase Instantaneous Definite Time Overcurrent Elements on page 3 1 substitu...

Page 89: ...E32 N SELOGIC Torque Control q Level 1 Level 1 Setting E5ON 1 67N3 50N3 67N3T 67N3TC SELOGIC Setting 67N3D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control Level 3 Setting E5ON 3 67N4 50N4 67N4T 67N4TC SELOGIC Setting 67N4D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control Level 4 Setting E5ON 4 50N2 67N2 67N2T 67N2D 0 ...

Page 90: ... A nominal channel IN current input 0 01 A secondary and 3 of setting 1 A nominal channel IN current input 1 mA secondary and 3 of setting 0 2 A nominal channel IN current input 1 mA secondary and 5 of setting 0 05 A nominal channel IN current input Timer 0 25 cycles and 0 1 of setting Transient Overreach 5 of setting Pickup and Reset Time Curves See Figure 3 5 and Figure 3 6 Residual Ground Insta...

Page 91: ... Control q Level 1 Level 1 Setting E5OG 1 67G3 50G3 67G3T 67G3TC SELOGIC Setting 67G3D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control Level 3 Setting E5OG 3 67G4 50G4 67G4T 67G4TC SELOGIC Setting 67G4D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control Level 4 Setting E5OG 4 50G2 67G2 67G2T 67G2D 0 Directional Control ...

Page 92: ...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 and Reset Time Curves See Figure 3 5 and Figure 3 6 Negative Sequence Instantaneous Definite Time Overcurrent Elements Four levels of negative sequence instantaneous definite time overcurrent elements are available Two additional levels of negative sequence instantaneou...

Page 93: ...Q6P 0 25 100 00 A secondary 5 A nominal phase current inputs IA IB IC 0 05 20 00 A secondary 1 A nominal phase current inputs IA IB IC Setting range for definite time settings 67Q1D 67Q4D 0 00 16000 00 cycles in 0 25 cycle steps Setting range for definite time setting 67Q2SD used in DCB logic 0 00 60 00 cycles in 0 25 cycle steps Accuracy Pickup 0 05 A secondary and 3 of setting 5 A nominal phase ...

Page 94: ...f E32 N SELOGIC Torque Control q Level 1 Level 1 Setting E5OQ 1 67Q3 50Q3 67Q3T 67Q3TC SELOGIC Setting 67Q3D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control Level 3 Setting E5OQ 3 67Q4 50Q4 67Q4T 67Q4TC SELOGIC Setting 67Q4D 0 Directional Control asserted to logical 1 continuously if E32 N SELOGIC Torque Control Level 4 Setting E5OQ 4 50Q2 67Q2 67Q2T 67Q2D ...

Page 95: ...g information Table 3 1 Available Phase Time Overcurrent Elements Time Overcurrent Element Enabled With Setting Operating Current See Figure 51PT E51P 1 or 2 IP maximum of A B and C phase currents Figure 3 14 51AT E51P 2 IA A phase current Figure 3 15 51BT E51P 2 IB B phase current Figure 3 16 51CT E51P 2 IC C phase current Figure 3 17 Table 3 2 Phase Time Overcurrent Element Maximum Phase Setting...

Page 96: ...N q Level 1 SELOGIC Torque Control 51PT Phase Time Overcurrent Element Curve Timing and Reset Timing Settings 51PP Pickup 51PC Curve Type 51PTD Time Dial 51PRS Electromechanical Reset Y N Pickup Curve Timeout Reset 51P 51PR 51PT Torque Control TCP State Switch Position Logical 1 Closed Logical 0 Open Logic Point TCP Controls the Torque Control Switch Setting 51PRS Reset Timing Y Electromechanical ...

Page 97: ...g 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 Control of Logic Point TCP Refer to Figure 3 14 The Torque Control Switch is controlled by logic point TCP Logic point TCP is controlled by directional control optio...

Page 98: ...the corresponding directional control input from Figure 4 19 has to be considered in the control of logic point TCP and thus in the control of the Torque Control Switch and phase time overcurrent element 51PT If directional control enable setting E32 N then logic point TCP logical 1 and thus the Torque Control Switch closes and phase time overcurrent element 51PT is enabled and nondirectional 51PT...

Page 99: ...g 51PP there is a one cycle delay before the element fully resets Relay Word bit 51PR reset indication logical 1 when the element is fully reset Operation of Single Phase Time Overcurrent Elements 51AT 51BT 51CT To understand the operation of Figure 3 15 Figure 3 16 and Figure 3 17 follow the explanation given for Figure 3 14 in Phase Time Overcurrent Elements on page 3 15 substituting phase curre...

Page 100: ...echanical Reset Y N Pickup Curve Timeout Reset 51B 51BR 51BT Torque Control TCB State Switch Position Logical 1 Closed Logical 0 Open Logic Point TCB Controls the Torque Control Switch Setting 51BRS Reset Timing Y Electromechanical N 1 Cycle TCB Relay Word Bits SELOGIC Setting 51CP IC Setting 51CTC Torque Control Switch Directional Control asserted to logical 1 continuously if E32 N q Level 1 SELO...

Page 101: ...rrent Element Curve Timing and Reset Timing Settings 51NP Pickup 51NC Curve Type 51NTD Time Dial 51NRS Electromechanical Reset Y N Pickup Curve Timeout Reset 51N 51NR 51NT Torque Control TCN State Switch Position Logical 1 Closed Logical 0 Open Logic Point TCN Controls the Torque Control Switch Setting 51NRS Reset Timing Y Electromechanical N 1 Cycle TCN Relay Word Bits SELOGIC Setting Table 3 4 N...

Page 102: ... understand the operation of Figure 3 19 follow the explanation given for Figure 3 14 in Phase Time Overcurrent Elements on page 3 15 substituting residual ground current IG IG 3I0 IA IB IC for maximum phase current IP and substituting like settings and Relay Word bits q From Figure 4 17 Figure 3 19 Residual Ground Time Overcurrent Element 51GT With Directional Control Option 51GP residual IG Sett...

Page 103: ...inputs IA IB IC 51GC curve type U1 U5 US curves see Figure 9 1 Figure 9 10 C1 C5 IEC curves 51GTD time dial 0 50 15 00 US curves see Figure 9 1 Figure 9 10 0 05 1 00 IEC curves 51GRS electromechanical reset timing Y N 51GTC SELOGIC control equation torque control setting Relay Word bits referenced in Table 9 5 or set directly to logical 1 1 see note NOTE SELOGIC control equation torque control set...

Page 104: ...urrent 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 Table 3 6 Negative Sequence Time Overcurrent Element Settings Setting Definition Range 51QP pickup 0 25 16 00 A secondary 5 A nominal phase current inputs IA IB IC 0 05 3 20 A secondary 1 A no...

Page 105: ... voltagea V2 Negative sequence voltage V1 Positive sequence voltage VS Synchronism check voltage from SEL 351 rear panel voltage input VSc c Voltage VS can be used in the synchronism check elements when global setting VSCONN VS see Synchronism Check Elements on page 3 33 Voltage VS can be connected to a zero sequence voltage source typically a broken delta connection when global setting VSCONN 3V0...

Page 106: ...27BC VBC 27CA VCA 59AB VAB 59PP 0 00 260 00 V secondary 150 V voltage inputs 0 00 520 00 V secondary 300 V voltage inputs 59BC VBC 59CA VCA 59N1 3V0 59N1P 0 00 150 00 V secondary 150 V voltage inputs 0 00 300 00 V secondary 300 V voltage inputs 59N2 3V0 59N2P 0 00 150 00 V secondary 150 V voltage inputs 0 00 300 00 V secondary 300 V voltage inputs 59Q V2 59QP 0 00 100 00 V secondary 150 V voltage ...

Page 107: ... 10 Voltage Elements Settings and Settings Ranges Delta Connected PTs Sheet 1 of 2 Voltage Element Relay Word Bits Operating Voltage Pickup Setting Range See Figure 27AB VAB 27PP 0 00 150 00 V secondary 150 V voltage inputs 0 00 300 00 V secondary 300 V voltage inputs Figure 3 23 27BC VBC 27CA VCA 3P27 27AB 27BC 27CA 27AB2 VAB 27PP2P 0 00 150 00 V secondary 150 V voltage inputs 0 00 300 00 V secon...

Page 108: ...tage inputs 0 00 120 00 V secondary 300 V voltage inputs 59V1 V1 59V1P 0 00 85 00 V secondary 150 V voltage inputs 0 00 170 00 V secondary 300 V voltage inputs Table 3 10 Voltage Elements Settings and Settings Ranges Delta Connected PTs Sheet 2 of 2 Voltage Element Relay Word Bits Operating Voltage Pickup Setting Range See Figure 27A1 27B1 27C1 3P27 27A2 27B2 27C2 59A1 59B1 59C1 3P59 59A2 59B2 59C...

Page 109: ...m Check Frequency and Power Elements Voltage Elements q Figure 5 6 Figure 3 22 Phase to Phase and Sequence Voltage Elements Wye Connected PTs 27AB 27BC 27CA 59N1 59N2 59Q 59V1 59AB 59BC 59CA 27PP 59PP 3V0 59N1P 59N2P V2 59QP V1 59V1P VAB VBC VCA Settings Voltages To POTT Logic q Relay Word Bits ...

Page 110: ... Phase to Phase Voltage Elements Delta Connected PTs q Figure 5 6 Figure 3 24 Sequence Voltage Elements Delta Connected PTs 27AB 27BC 27CA 3P27 27AB2 27BC2 27CA2 59AB 59BC 59CA 3P59 59AB2 59BC2 59CA2 27PP 27PP2P 59PP 59PP2P VAB VBC VCA Settings Voltages To POTT Logic q Relay Word Bits 59Q 59Q2 59V1 V2 59QP 59Q2P V1 59V1P Settings Voltages To POTT Logic q Relay Word Bits ...

Page 111: ...ce 27 and overvoltage Device 59 type elements Undervoltage elements Device 27 assert when the operating voltage goes below the corresponding pickup setting Overvoltage elements Device 59 assert when the operating voltage goes above the corresponding pickup setting Undervoltage Element Operation Example Refer to Figure 3 21 top of the figure Pickup setting 27P1P is compared to the magnitudes of the...

Page 112: ...uts Note that voltage elements 27AB 27BC 27CA and 59Q are also used in the weak infeed portion of the POTT logic if the weak infeed logic is enabled see Figure 5 6 If the weak infeed portion of the POTT logic is enabled setting EWFC Y and these voltage elements are used in the logic they can still be used in other applications if the settings are applicable If the weak infeed portion of the POTT l...

Page 113: ...losed at a zero degree phase angle difference to minimize system shock These synchronism check elements are explained in detail in the following text Voltage Input VS Connected Phase to Phase or Beyond Delta Wye Transformer Sometimes synchronism check voltage VS cannot be in phase with voltage VA VB or VC wye connected PTs or VAB VBC or VCA delta connected PTs This happens in applications where vo...

Page 114: ...y degrees VS constantly lags VAB In any synchronism check application voltage input VA VB always has to be connected to determine system frequency on one side of the circuit breaker to determine the slip between VS and VAB VAB always has to meet the healthy voltage criteria settings 25VHI and 25VLO see Figure 3 26 Thus for situations where VS cannot be in phase with VAB VBC or VCA it is most strai...

Page 115: ...ient Overreach 5 of setting Slip Pickup 0 003 Hz Angle Pickup 4 Synchronism Check Elements Voltage Inputs The two synchronism check elements are single phase elements with single phase voltage inputs VP and VS used for both elements VP Phase input voltage VA VB or VC for wye connected voltages VAB VBC VCA for delta connected voltages designated by setting SYNCP e g if SYNCP VB then VP VB VS Synchr...

Page 116: ...ting SYNCP if SYNCP 0 330 then VP VA Delta Connected Select VAB VBC or VCA with setting SYNCP if SYNCP 0 330 then VP VAB Block Synchronism Check VA wye connected VAB delta connected VP Within Healthy Voltage Window VS Within Healthy Voltage Window VA or VAB Within Healthy Voltage Window Slip Frequency Calculator Enable Frequency of VP less than or equal to Frequency of VP greater than Frequency of...

Page 117: ...Angle 1 Maximum Angle 2 Maximum Angle 1 Breaker Close Time Maximum Angle 2 Slip Frequency Element SF VP VP VS VS Relay Word Bits SF Slip Frequency q 0 Relay Word Bits 25A1 25A2 25A1 25A2 Relay Word Bits Angle Difference Angle Difference Enable Enable absolute value absolute value compensated by setting TCLOSD Synchronism Check Element 1 Synchronism Check Element 2 Synchronize at Angle Difference 0...

Page 118: ...terminals VB N or voltage terminals VB VA connected in parallel with voltage terminals VB VC for delta connect voltage terminal VA to VC In such a nonstandard parallel connection remember that voltage terminals VA N are monitoring Phase B or voltage terminals VB VA are monitoring BC phase to phase for delta This understanding helps prevent confusion when observing metering and event report informa...

Page 119: ...sed Relay Word bits 59VP 59VS and 59VA can still be used in other logic with voltage limit settings 25VLO and 25VHI set as desired Enable the synchronism check logic setting E25 Y and make settings 25VLO and 25VHI Apply Relay Word bits 59VP 59VS and 59VA in desired logic scheme using SELOGIC control equations Even though synchronism check logic is enabled the synchronism check logic outputs Relay ...

Page 120: ...voltage VP and voltage VS changes by 36 degrees The absolute value of the Slip Frequency output is run through a comparator and if the slip frequency is less than the maximum slip frequency setting 25SF Relay Word bit SF asserts to logical 1 Generator Application for SSLOW and SFAST Relay Word bits SSLOW and SFAST in Figure 3 26 indicate the relative slip of voltages VP and VS fP fS SSLOW logical ...

Page 121: ...ngle Difference Calculator calculates the angle difference between voltages VP and VS Angle Difference VP VS For example if SYNCP 90 indicating VS constantly lags VP VA by 90 degrees but VS actually lags VA by 100 angular degrees on the power system at a given instant the Angle Difference Calculator automatically accounts for the 90 degrees and Angle Difference VP VS 10 Also if breaker close time ...

Page 122: ...lip frequency is greater than 0 005 Hz and breaker close time setting TCLOSD 0 00 the Angle Difference Calculator takes the breaker close time into account with breaker close time setting TCLOSD set in cycles see Angle Difference Decreasing VS Approaching VP Angle Difference Increasing VS Moving Away From VP Angle Difference Angle Difference Angle Compensation for Breaker Close Time TCLOSD Angle C...

Page 123: ...close time TCLOSD the voltage angle difference between voltages VP and VS changes by 6 degrees This 6 degree angle compensation is applied to voltage VS resulting in derived voltage VS as shown in Figure 3 28 The top of Figure 3 28 shows the Angle Difference decreasing VS is approaching VP Ideally circuit breaker closing is initiated when VS is in phase with VP Angle Difference 0 degrees Then when...

Page 124: ...Angle Difference decreasing VS is approaching VP When VS is in phase with VP Angle Difference 0 degrees synchronism check elements 25A1 and 25A2 assert to logical 1 2 The bottom of Figure 3 28 shows the Angle Difference increasing VS is moving away from VP VS was in phase with VP Angle Difference 0 degrees but has now moved past VP If the Angle Difference is increasing but the Angle Difference is ...

Page 125: ...G1 or 25ANG2 If the Angle Difference is less than angle setting 25ANG1 or 25ANG2 then the corresponding Relay Word bit 25A1 or 25A2 asserts to logical 1 for that instant asserts for 1 4 cycle For example if SELOGIC control equation setting 79CLS Reclose Supervision is set as follows 79CLS 25A1 and the angle difference is less than angle setting 25ANG1 at that instant setting 79CLS asserts to logic...

Page 126: ...rough 6 as shown in Figure 3 31 Frequency is determined from the voltage connected to voltage terminals VA N q Figure 3 31 Figure 3 29 Undervoltage Block for Frequency Elements Group Setting VNOM OFF q Figure 3 31 Figure 3 30 Undervoltage Block for Frequency Elements Group Setting VNOM OFF 0 5 CYC 27B81P Setting VA VAB VB VBC VC VCA Voltages Wye Delta to Frequency Element Logic q 27B81 Relay Word ...

Page 127: ...quency Overfrequency Underfrequency Overfrequency Underfrequency Overfrequency Underfrequency 81D2 w 81D2T 0 81D3 w 81D3T 0 81D4 w 81D4T 0 27B81 Relay Word Bits 81D1 w Relay Word Bits Enabled Frequency Elements 81D1P Settings in Hz Frequency Element 2 Setting E81 2 81D2P NFREQ 81D2P NFREQ 81D2P Frequency Element 3 Setting E81 3 81D3P NFREQ 81D3P NFREQ 81D3P Frequency Element 4 Setting E81 4 81D4P ...

Page 128: ...secondary 300 V voltage inputs 81D1P frequency element 1 pickup 40 10 65 00 Hz 81D1Da a Frequency element time delays are best set no less than 5 cycles Frequency is determined by a zero crossing technique on voltage VA If voltage waveform offset occurs e g due to a fault then frequency can be off for a few cycles A 5 cycle or greater time delay e g 81D1D 6 00 cycles overrides this occurrence freq...

Page 129: ... system frequency is less than or equal to 61 25 Hz 81D1P 61 25 Hz frequency element 1 outputs 81D1 logical 0 instantaneous element 81D1T logical 0 time delayed element If system frequency is greater than 61 25 Hz 81D1P 61 25 Hz frequency element 1 outputs 81D1 logical 1 instantaneous element 81D1T logical 1 time delayed element Relay Word bit 81D1T asserts to logical 1 only after time delay 81D1D...

Page 130: ...ere is only single phase voltage available to the relay Other Uses for Undervoltage Element 27B81 If voltage pickup setting 27B81P is applicable to other control schemes Relay Word bit 27B81 can be used in other logic at the same time it is used in the frequency element logic If frequency elements are not being used Relay Word bit 27B81 can still be used in other logic with voltage setting 27B81P ...

Page 131: ...elements These elements are also available as Relay Word bits so they can be used in any SELOGIC control equation See Sag Swell Interruption SSI Report Available in Firmware Version 7 on page 12 34 Voltage Sag Elements As shown in Figure 3 32 if the magnitude of a voltage drops below the voltage sag pickup threshold for one cycle the corresponding SAG Relay Word bit for that phase or phase to phas...

Page 132: ...on pickup and dropout thresholds depend on Vbase and the VINT setting Figure 3 34 Voltage Interruption Elements Voltage Sag Swell and Interruption Elements Settings The settings ranges for the SSI thresholds are shown in Table 3 13 The factory default settings match the Interruption Sag and Swell definitions in IEEE Standard 1159 1995 Classifications of RMS Variations Set p A B or C Wye or p AB BC...

Page 133: ...se locked at a healthy system voltage level Once the disturbance is over and all of the SAGp SWp and INTp Relay Word bits deassert and the FAULT SELOGIC control equation setting deasserts the thermal element for Vbase is unblocked Figure 3 35 shows an example of how Vbase tracking is suspended during a voltage disturbance wye connected The example voltage disturbance is the result of an overload c...

Page 134: ...ermal element is automatically initialized when the relay is powered up and also after a settings change or group change that results in a new ESSI Y condition Vbase can also be forced to initialize by issuing the SSI R command Access Level 1 During initialization the SSI elements are deasserted and the SSI Recorder is disabled until all of the following conditions are met V1 3V2 correct phase rot...

Page 135: ...west value depends on the global setting PTCONN When PTCONN WYE minimum Vbase When PTCONN DELTA minimum Vbase The maximum value that Vbase can achieve is equivalent to 300 volts secondary divided by VSWELL so the maximum Vbase in primary kV is The upper limit for Vbase is not affected by the PTCONN global setting If the expected higher end of the normal system voltage range is close to 300 V secon...

Page 136: ...ction control VAR control for capacitor banks Power Elements Settings The power element type settings are made in reference to the load convention WATTS positive or forward real power WATTS negative or reverse real power Table 3 14 Single Phase Power Element Settings and Setting Ranges EPWR 1 2 3 or 4 Settings Definition Range PWR1P PWR2P PWR3P PWR4P Power element pickup OFF 0 33 13000 00 VA secon...

Page 137: ...ement s are still receiving sufficient operating quantities In some protection schemes this may jeopardize coordination One method of accommodating this is to increase the power element time delay settings Another method is to supervise the power element Relay Word bit s with the overcurrent element pickup For example if the application requires that the relay trip the attached circuit breaker whe...

Page 138: ...setting at unity power factor 1 A nominal Three Phase Power Elements EPWR 3P1 3P2 3P3 or 3P4 Pickup Pickup setting 1 6 VA 5 A nominal 0 2 1 VA 1 A nominal 0 05 A L L voltage secondary and 10 of setting at unity power factor for power elements and zero power factor for reactive power element 5 A nominal 0 01 A L L voltage secondary and 10 of setting at unity power factor for power elements and zero...

Page 139: ... connected relays Global setting PTCONN DELTA with a broken delta 3V0 connection Global setting VSCONN 3V0 the three phase power is the same as the sum of the theoretical single phase powers under any conditions of unbalance because the zero sequence voltage is available via the VS NS terminals provided the 3V0 source is on the same bus section as the three phase voltage inputs the two signal sour...

Page 140: ...ycle Average 2 Switch B 1 1 Switch A Position WATTS WATTS VARS VARS Setting PWRnT 1 1 2 2 Switch B Position 1 2 1 2 Where n 1 2 3 or 4 40 V VBC VAB Reactive Power Three Phase Real Power Three Phase Multiply by 1 Sufficient Signal Setting 3PWRn 3PWRnP Relay Word Bits PWRnD 0 Reactive Power Reactive Power Real Power Real Power PWR2P pickup PWR1P pickup PWR3P pickup PWR4P pickup Set as Reactive Power...

Page 141: ...R capacitor bank in Figure 3 39 is put on line and taken off line according to the VAR loading on the transformer bank feeding the 21 6 kV bus The VAR loading is measured with the SEL 351 B located at bus circuit breaker 52 B Two SEL 351 relays control the capacitor bank both relays are connected to capacitor bank circuit breaker 52 C The SEL 351 C provides capacitor overcurrent protection and tri...

Page 142: ...rips circuit breaker 52 C for a fault in the capacitor bank Automatic closing of circuit breaker 52 C with the SEL 351 B can then take place only after the block close signals are reset The exact implementation of this block close logic requires an application note beyond the scope of this discussion The rest of this discussion focuses on the determination of VAR levels and corresponding power ele...

Page 143: ...nit VAR level leading when the capacitor bank is taken off line 1 2 1 0 0 2 There is a margin of 0 5 per unit VARs until the capacitor bank is put on line again 0 2 0 5 0 3 Settings for Single Phase Power Elements From preceding calculations and figures 9600 kVAR 1 0 per unit VARs 80 0 VA secondary single phase Convert the per unit VAR levels 0 3 and 1 2 to single phase VA voltamperes secondary 0 ...

Page 144: ...d PWRC1 assert when the lagging VAR level exceeds the 0 3 per unit VAR level lagging for each respective phase see Figure 3 40 and left hand side of Figure 3 38 These elements are used in close logic in the SEL 351 B to automatically put the 9600 kVAR capacitor bank on line Resulting single phase power elements PWRA2 PWRB2 and PWRC2 assert when the leading VAR level exceeds the 1 2 per unit VAR le...

Page 145: ...15 Figure 4 16 and Figure 4 22 Figure 4 1 Loss of Potential Logic Inputs into the LOP logic are Inputs Description 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 I0 zero sequence current A secondary V0 zero sequence voltage V secondary wye connected PTs LOP ELOP Y ELOP Y1 ELOP Y...

Page 146: ...orced to logical 0 and setting ELOP can only be set to N See Potential Transformer Ratios and PT Nominal Secondary Voltage Settings on page 9 42 for more details on the VNOM setting Setting ELOP Y or Y1 If setting ELOP Y or Y1 and a loss of potential condition occurs Relay Word bit LOP asserts to logical 1 all internal enables see NOTE 1 below except for 32IE are disabled see Figure 4 6 Figure 4 7...

Page 147: ...overcurrent elements set direction forward if setting ELOP Y NOTE 2 When global setting VSCONN 3V0 the various ground directional elements that rely on zero sequence voltage quantities ORDER settings V S P and U are not affected by a loss of potential condition on relay inputs VA VB and VC because these elements use the 3V0 zero sequence voltage that comes directly from voltage input VS rather tha...

Page 148: ...mulative currents of all the feeders but still has to provide overcurrent backup protection for all these feeders If the phase elements in the bus relay are set to provide adequate backup they often are set close to maximum bus load current levels This runs the risk of tripping on bus load current The load encroachment feature prevents this from happening as shown in the example that follows in th...

Page 149: ... of ZLOUT and ZLIN ZLOAD ZLOUT ZLIN Settings Ranges Refer to Figure 4 2 Load Encroachment Setting Example Example system conditions The PTs are connected line to neutral Setting Description and Range ZLF Forward Minimum Load Impedance corresponding to maximum load flowing out ZLR Reverse Minimum Load Impedance corresponding to maximum load flowing in 0 05 64 00 Ω secondary 5 A nominal phase curren...

Page 150: ...value can be calculated more expediently with the following equation line line voltage in kV 2 CT ratio 3 phase load in MVA PT ratio Again for the maximum forward load 230 2 400 800 2000 13 2 Ω secondary To provide a margin for setting ZLF multiply by a factor of 0 9 ZLF 13 2 Ω secondary 0 9 11 90 Ω secondary For the maximum reverse load 230 2 400 500 2000 21 1 Ω secondary Again to provide a margi...

Page 151: ...itions loss of potential see Figure 4 1 positive sequence voltage V1 can be substantially depressed in magnitude or changed in angle This change in V1 can possibly cause ZLOAD to deassert logical 0 erroneously indicating that a fault condition exists Thus ZLOAD should be supervised by LOP in a torque control setting This also effectively happens in the directional element in Figure 4 21 where ZLOA...

Page 152: ...mbedded in the positive sequence voltage polarized directional element logic The 32QE Relay Word bit input into the negative sequence voltage polarized directional element logic Figure 4 20 also has LOP control embedded in it see Figure 4 6 And both these directional elements Figure 4 20 and Figure 4 21 have overcurrent fault detectors 50QF 50QR and 50P23P respectively Use SEL 321 Relay Applicatio...

Page 153: ...the following subsection Directional Control Settings on page 4 38 Six directional elements are available to control the neutral ground and residual ground overcurrent elements not all available simultaneously These six directional elements are Negative sequence voltage polarized directional element Zero sequence voltage polarized directional element Channel IN current polarized directional elemen...

Page 154: ...P and U in l are mutually exclusive choices for setting ORDER see r 32NE 50NF 50NR Disable Inputs Petersen Coil o Low Impedance i to Neutral Ground Time Overcurrent Elements j to Neutral Ground Inst Def Time Overcurrent Elements k Level 1 Level 2 Level 3 Level 4 32NF 32NR Best Choice Ground Directional Logic r Zero Sequence Voltage Polarized y Negative Sequence Voltage Polarized t q a w 32VE V lis...

Page 155: ...sponding Ground Directional Element and System Grounding Corresponding Internal Enables and System Grounding Corresponding Figures Availability Q Negative sequence voltage polarized 32QGE Figure 4 6 Figure 4 9 All models not dependent on neutral channel IN V Zero sequence voltage polarized 32VE Figure 4 7 Figure 4 10 I Channel IN current polarized 32IE Figure 2 13 Figure 4 7 Figure 4 11 Models wit...

Page 156: ...led All models not dependent on neutral channel IN Q 32QGE QV 32QGE 32VE V 32VE VQ 32VE 32QGE I 32IE Additional setting combinations for models with a 1 A or 5 A nominal neutral channel IN IQ 32IE 32QGE IQV 32IE 32QGE 32VE IV 32IE 32VE IVQ 32IE 32VE 32QGE QI 32QGE 32IE QIV 32QGE 32IE 32VE QVI 32QGE 32VE 32IE VI 32VE 32IE VIQ 32VE 32IE 32QGE VQI 32VE 32QGE 32IE VS 32VE 32NE Low impedance Additional...

Page 157: ...ce S is listed in setting ORDER By virtue of not being available or not being listed in setting ORDER the directional elements corresponding to setting choices I P and U see Table 4 1 Figure 4 4 and Figure 4 5 are defeated and nonoperational So for nonavailable setting choice I corresponding internal enable 32IE logical 0 and directional outputs F32I logical 0 and R32I logical 0 Similarly for the ...

Page 158: ...unded Systems If an ungrounded or high impedance grounded system setting ORDER U has appreciable circuit length the capacitance levels can be such that appreciable current flows for a ground fault A low impedance grounded system setting ORDER contains S can also have appreciable current flow for a ground fault Refer to Figure 4 8 The 0 2 A nominal neutral channel IN can discriminate up to 5 A seco...

Page 159: ... and Z0R are applied to Figure 4 12 and Figure 4 14 where neutral current IN from neutral current channel IN is also applied Settings Z0F and Z0R are adjusted internally with CT ratio settings to operate on this IN current base Z0F CTRN CTR IN base Z0R CTRN CTR IN base If the logic in Figure 4 8 and Figure 4 12 and Figure 4 14 operates on residual current IG as a result of current switching then s...

Page 160: ... logic for the directional elements corresponding to S or P is effectively handled with the disable inputs internal enables 32QGE and 32VE running into the internal enable logic of Figure 4 8 If neither 32QGE nor 32VE are asserted and thus their corresponding directional elements are not enabled then the internal enable logic of Figure 4 8 is free to run for the last directional element selected i...

Page 161: ...re 4 15 and Figure 4 16 In this situation the elements that are enabled by signals 32VE and 32NE are still able to operate reliably during a loss of potential condition so there is no need to force the forward outputs to assert However when 32VE or 32NE are not asserted a standing LOP condition will force the forward outputs to assert continuously Consider this when determining residual and neutra...

Page 162: ... of Directional Control Settings on page 4 38 for discussion of the operation of level direction settings DIR1 through DIR4 when the directional control enable setting E32 is set to E32 N In some applications level direction settings DIR1 through DIR4 are not flexible enough in assigning the desired direction for certain overcurrent elements Directional Control Provided by Torque Control Settings ...

Page 163: ...and Figure 4 16 Figure 4 7 Internal Enables 32VE and 32IE Logic for Zero Sequence Voltage Polarized and Channel IN Current Polarized Directional Elements 3V0 q Loss of Potential ELOP Y or Y1 LOP t I listed in setting ORDER Setting Enable Setting Enable V listed in setting ORDER r 32IE Internal Enable e 32VE Internal Enable w Neutral Ground Threshold Channel IN Nominal Rating 0 05 IN E32IV 50GF 50G...

Page 164: ...ional Elements Low Impedance Grounded Petersen Coil Grounded and Ungrounded High Impedance Grounded Systems Refer to the setting ideas for SELOGIC setting E32IV near the back of this section especially if setting ORDER U ungrounded or high impedance grounded system 3V0 q Loss of Potential 32NE Internal Enable High Impedance Grounded e ORDER U Ungrounded Petersen Coil Grounded Low Impedance Grounde...

Page 165: ...reshold 1 25 Z2F 0 25 I2 V2 If Z2F Setting 0 Forward Threshold 0 75 Z2F 0 25 Forward Threshold I2 V2 If Z2R Setting 0 Reverse Threshold 1 25 Z2R 0 25 I2 V2 If Z2R Setting 0 Reverse Threshold 0 75 Z2R 0 25 Reverse Threshold Note 1 Z1L One Ohm at the Positive Sequence Line Angle Direction Element Characteristics R2 X2 Forward Threshold Reverse Threshold Z2 PLANE 32QGE is highest w R32QG Reverse F32Q...

Page 166: ...e Voltage Sources on page 4 15 I0 V0 If Z0F Setting 0 Forward Threshold 1 25 Z0F 0 25 I0 V0 If Z0F Setting 0 Forward Threshold 0 75 Z0F 0 25 Forward Threshold I0 V0 If Z0R Setting 0 Reverse Threshold 1 25 Z0R 0 25 I0 V0 If Z0R Setting 0 Reverse Threshold 0 75 Z0R 0 25 Reverse Threshold Note 1 Z0MTA One Ohm at the Zero Sequence Line Angle Direction Element Characteristics R0 X0 Forward Threshold Re...

Page 167: ...ent Polarized Directional Element Forward Threshold Channel IN Nominal Rating Phase Channels Nominal Rating 0 05 2 Forward Threshold Reverse Threshold Channel IN Nominal Rating Phase Channels Nominal Rating 0 05 2 Reverse Threshold 32IE is highest w R32I Reverse F32I Forward Best Choice Ground Directional Logic 50GF Enable Forward Threshold 32IE Reverse Threshold 50GR q Re IG IN IG IN Relay Word B...

Page 168: ...bal setting VSCONN 3V0 See Zero Sequence Voltage Sources on page 4 15 IN 3V0 If Z0F Setting 0 Forward Threshold 1 25 Z0F 0 25 IN 3V0 If Z0F Setting 0 Forward Threshold 0 75 Z0F 0 25 Forward Threshold IN 3V0 If Z0R Setting 0 Reverse Threshold 1 25 Z0R 0 25 IN 3V0 If Z0R Setting 0 Reverse Threshold 0 75 Z0R 0 25 Reverse Threshold Note 1 Z0MTA One Ohm at the Zero Sequence Line Angle Direction Element...

Page 169: ...quence Voltage Sources on page 4 15 P 0 Reverse Threshold Forward Threshold Q 0 Zero Sequence Power Plane Forward Threshold 32WFP 0 95 3V 0 I N 0 05 32WFP Wattmetric Forward Pickup W Secondary 32WRP Wattmetric Reverse Pickup W Secondary Reverse Threshold 32WRP 0 95 3V 0 I N 0 05 Re 3V 0 I N Enable 0 32WD 0 32WD Forward Reverse R32W F32W Delay Setting Cyc Reverse Threshold Forward Threshold Wattmet...

Page 170: ...NN VS and PTCONN WYE or a measured value when global setting VSCONN 3V0 See Zero Sequence Voltage Sources on page 4 15 IN 3V0 Z0F 0 10 Forward Threshold 0 75 Z0F 0 25 Forward Threshold IN 3V0 Z0R 0 10 Reverse Threshold 0 75 Z0R 0 25 Reverse Threshold Note 1 90 One Ohm at 90 Angle For setting ORDER U settings Z0F and Z0R are set internally as shown above and hidden Direction Element Characteristics...

Page 171: ...t Elements q From Figure 4 7 w from Figure 4 8 e from Figure 9 11 r from Figure 4 1 t from Figure 4 9 y from Figure 4 10 u from Figure 4 11 i from Figure 4 12 Figure 4 13 or Figure 4 14 o to Figure 4 18 Figure 4 16 Routing of Direction Elements to Neutral Ground Overcurrent Elements LOP Relay Word Bits q 32VE w 32NE F32QG R32QG e 3V0 q 32IE Relay Word Bits 32GF Forward 32GR Reverse Relay Word Bits...

Page 172: ...Forward Reverse Logic for Residual Ground Overcurrent Elements Level Direction Settings Directional Control 32GF q DIR1 F DIR1 N Relay Word Bits to Residual Ground Time 0vercurrent Elements w to Residual Ground Instantaneous Definite Time Overcurrent Elements e ORDER OFF or ORDER P Setting Forward Forward 32GR q Reverse Level 1 DIR1 R Reverse DIR2 F DIR2 N Forward Level 2 DIR2 R Reverse DIR3 F DIR...

Page 173: ...ection Forward Reverse Logic for Neutral Ground Overcurrent Elements Level Direction Settings Directional Control 32NF q DIR1 F DIR1 N Relay Word Bits to Neutral Ground Time 0vercurrent Elements w to Neutral Ground Instantaneous Definite TIme Overcurrent Elements e ORDER OFF Setting Forward Forward 32NR q Reverse Level 1 DIR1 R Reverse DIR2 F DIR2 N Forward Level 2 DIR2 R Reverse DIR3 F DIR3 N For...

Page 174: ...tions of Figure 4 6 and Figure 4 21 See Settings for Voltage Input Configuration on page 9 39 for a complete list of changes caused by setting VNOM OFF q Figure 4 6 w Figure 4 20 e Figure 4 21 r Figure 4 22 t Figure 4 23 y Figure 4 24 u Figure 3 20 i Figure 3 12 o Figure 3 14 Figure 3 17 a Figure 3 3 Figure 4 19 General Logic Flow of Directional Control for Negative Sequence and Phase Overcurrent ...

Page 175: ...nal element operates for unbalanced faults while the positive sequence voltage polarized directional element operates for three phase faults Note also in Figure 4 21 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 2 Directional Element Routing Refer to Figure 4 19 a...

Page 176: ...nts set direction forward DIR2 F Level 3 overcurrent elements set direction reverse DIR3 R If a level direction setting e g DIR1 is set DIR1 N nondirectional then the corresponding Level 1 directional control outputs in Figure 4 23 and Figure 4 24 assert to logical 1 The referenced Level 1 overcurrent elements in Figure 4 23 and Figure 4 24 are then not controlled by the directional control logic ...

Page 177: ...nt Elements I2 V2 If Z2F Setting 0 Forward Threshold 1 25 Z2F 0 25 I2 V2 If Z2F Setting 0 Forward Threshold 0 75 Z2F 0 25 Forward Threshold I2 V2 If Z2R Setting 0 Reverse Threshold 1 25 Z2R 0 25 I2 V2 If Z2R Setting 0 Reverse Threshold 0 75 Z2R 0 25 Reverse Threshold Direction Element Characteristics R2 X2 Forward Threshold Reverse Threshold Z2 PLANE q R32Q Reverse F32Q Forward 50QF Enable Forward...

Page 178: ...21 Positive Sequence Voltage Polarized Directional Element for Phase Overcurrent Elements 50P32P 3 50P32 IA IB IB IC IC IA ELOP Y or Y1 LOP Setting w 32QE q ZLOAD VPOLV Setting fixed at phase channels nominal rating 0 1 when enable setting ELOAD Y F32P Forward R32P Reverse 90 Z1ANG Z1 90 Z1ANG q e r Z1ANG X1 90 270 0 180 R1 Forward Reverse Loss of Potential Neg Seq Dir Element Has Priority Load Co...

Page 179: ...e Sequence and Phase Overcurrent Elements q From Figure 4 1 w from Figure 4 20 e from Figure 4 21 r to Figure 4 23 t to Figure 4 24 Figure 4 22 Routing of Directional Elements to Negative Sequence and Phase Overcurrent Elements LOP w e F32Q R32Q Relay Word Bits 32PF Forward 32QF Forward 32PR Reverse 32QR Reverse Setting ELOP Y q r t Loss of Potential F32P R32P ...

Page 180: ... Reverse Logic for Negative Sequence Overcurrent Elements Directional Control Level Direction Settings 32QF q DIR1 F DIR1 N Relay Word Bit Relay Word Bit to Negative Sequence Time 0vercurrent Element w to Negative Sequence Instantaneous Definite TIme Overcurrent Elements e VNOM OFF Setting Forward Forward 32QR q Reverse Level 1 DIR1 R Reverse DIR2 F DIR2 N Forward Level 2 DIR2 R Reverse DIR3 F DIR...

Page 181: ... 4 24 Direction Forward Reverse Logic for Phase Overcurrent Elements Directional Control Level Direction Settings 32PF q DIR1 F DIR1 N Relay Word Bit Relay Word Bit to Phase Time 0vercurrent Elements w to Phase Instantaneous Definite TIme Overcurrent Elements e VNOM OFF Setting Forward Forward 32PR q Reverse Level 1 DIR1 R Reverse DIR2 F DIR2 N Forward Level 2 DIR2 R Reverse DIR3 F DIR3 N Forward ...

Page 182: ...ssert to logical 1 The overcurrent elements referenced in Figure 4 17 Figure 4 18 Figure 4 23 and Figure 4 24 are then not controlled by the directional control logic There is one case that does not allow group setting E32 Y or AUTO If all three of the following are true E32 can only be set to N The relay model has a 0 2 A or 0 05 A nominal neutral channel Global setting VSCONN VS Group setting VN...

Page 183: ...es not contain V or I Z0F Z0R Z0MTA setting ORDER does not contain V or S 59RES 32WFP 32WRP 32WD setting ORDER does not contain P or model does not have a 0 2 A nominal neutral channel IN 50NFP 50NRP a0N setting ORDER does not contain S or U or model does not have a 0 2 A nominal neutral channel IN Table 4 4 Overcurrent Elements Controlled by Level Direction Settings DIR1 Through DIR4 Correspondin...

Page 184: ...d directional element Q negative sequence voltage polarized directional element see Figure 4 9 is the first priority directional element to provide directional control for the neutral ground and residual ground overcurrent elements If the negative sequence voltage polarized directional element is not operable i e it does not have sufficient operating quantity as indicated by its internal enable 32...

Page 185: ...nly the wattmetric directional element provides ground overcurrent element directional control setting ORDER P presumably there is no bypass around the Petersen Coil With the tuned Petersen Coil in place and not shorted out by a bypass very little current flows for a ground fault With such low current levels the neutral ground overcurrent elements referenced in Figure 4 18 are the elements that de...

Page 186: ...nd Figure 4 20 If enable setting E32 Y settings Z2F and Z2R negative sequence impedance values are calculated by the user and entered by the user but setting Z2R must be greater in value than setting Z2F by 0 1 Ω secondary Z2F and Z2R Set Automatically If enable setting E32 AUTO settings Z2F and Z2R negative sequence impedance values are calculated automatically using the positive sequence line im...

Page 187: ... the lowest expected negative sequence current magnitude for unbalanced reverse faults 50QFP and 50QRP Set Automatically If enable setting E32 AUTO settings 50QFP and 50QRP are set automatically at 50QFP 0 50 A secondary 5 A nominal phase current inputs IA IB IC 50QRP 0 25 A secondary 5 A nominal phase current inputs IA IB IC 50QFP 0 10 A secondary 1 A nominal phase current inputs IA IB IC 50QRP 0...

Page 188: ...nal decisions for the neutral ground and residual ground overcurrent elements The zero sequence current I0 referred to in the above application of the k2 factor is from the residual current IG which is derived from phase currents IA IB and IC I0 IG 3 3I0 IG IA IB IC If both of the internal enables 32VE internal enable for the zero sequence voltage polarized directional element that controls the ne...

Page 189: ...polarized directional elements see Figure 4 7 Ideally this setting is above normal load unbalance and below the lowest expected zero sequence current magnitude for unbalanced reverse faults See Petersen Coil Considerations for Setting ORDER on page 4 41 for more information on setting 50GFP and 50GRP for a Petersen Coil grounded system 50GFP and 50GRP Set Automatically If enable setting E32 AUTO s...

Page 190: ...A nominal phase current inputs IA IB IC 640 00 to 640 00 Ω secondary 300 V voltage inputs VA VB VC 1 A nominal phase current inputs IA IB IC If preceding setting ORDER does not contain V or S no zero sequence voltage polarized directional element is enabled then settings Z0F and Z0R are not made by the user or displayed Z0F and Z0R are used to calculate the Forward and Reverse Thresholds respectiv...

Page 191: ... can be instructive for negative sequence impedance analysis too For a forward fault the SEL 351 effectively sees the sequence impedance behind it as ZM V0 I0 V0 I0 V0 I0 ZM what the relay sees for a forward fault For a reverse fault the SEL 351 effectively sees the sequence impedance in front of it ZN V0 I0 V0 I0 ZN what the relay sees for a reverse fault If the system in Figure 4 25 is a solidly...

Page 192: ...e fault determination see Figure 9 12 If enable setting E32 AUTO then Z0MTA is set equal to Z0ANG and Z0MTA is hidden 50NFP Forward Directional Neutral Ground Current Pickup 50NRP Reverse Directional Neutral Ground Current Pickup Setting Range 0 005 5 00 A secondary 0 2 A nominal neutral channel input IN If preceding setting ORDER does not contain S or U zero sequence voltage polarized directional...

Page 193: ...ive Sequence Current Restraint Factor IN I1 Setting Range 0 001 0 500 unitless If preceding setting ORDER does not contain S or U zero sequence voltage polarized directional elements low impedance grounded or ungrounded high impedance grounded are not enabled or the model does not have a 0 2 A nominal neutral channel IN then setting a0N is not made or displayed Refer to Figure 4 8 The following co...

Page 194: ...onsiderations in making the 59RES setting that are related to the scaling of the VS NS input signal The 59RES setting must be entered on the same secondary base as the voltage terminals VA VB and VC See Settings Considerations for Petersen Coil Grounded Systems on page 4 53 for an example 32WFP and 32WRP Wattmetric Forward and Reverse Pickups Petersen Coil Grounded System Setting Range 0 001 150 0...

Page 195: ...In such an optimum tuned state little current flows through the Petersen Coil Some Petersen Coils are continually adjusted automatically as load levels system topology change so that tuning remains optimum The tuned circuit resists sustaining an arc so many ground faults are self extinguished by the circuit itself no circuit breaker operation necessary Consider a permanent line to ground fault out...

Page 196: ...ation reveals forward or reverse fault direction forward faults produce negative calculation values and reverse faults produce positive calculation values on Petersen Coil grounded systems Calculate the 32WFP and 32WRP wattmetric pickup settings in watts secondary with a margin of more sensitivity than the minimum detected ground faults forward and reverse respectively Enter wattmetric settings as...

Page 197: ... connected PTs PT ratio 7200 120 setting PTR 7200 120 60 and a core flux summation CT CT ratio 50 5 setting CTRN 50 5 10 is used to demonstrate the required setting scaling If the desired zero sequence voltage pickup for the Wattmetric element in primary 3V0 is 400 V primary obtain the proper setting for 59RES by dividing the primary voltage by the PT ratio for voltage inputs VA VB and VC If the d...

Page 198: ...tage base For our example system the desired 3V0 pickup in terms of the voltage applied to channel VS is The example 3V0 pickup value in terms of the voltage applied to channel VS is The 59RES setting is determined as follows As expected this is the same value as before Similarly if the desired Wattmetric pickup for the Wattmetric element is known in terms of VS channel volts secondary and IN chan...

Page 199: ...rized and channel IN current polarized directional elements for directional control of neutral ground and residual ground overcurrent elements For most applications set E32IV directly to logical 1 E32IV 1 numeral 1 Table 4 5 Affect of Global Settings VSCONN and PTCONN on Petersen Coil Directional Elements Relay Function When VSCONN VS and PTCONN WYE When VSCONN VS and PTCONN DELTA When VSCONN 3V0 ...

Page 200: ... U phase to phase or unbalanced three phase faults can cause the ungrounded high impedance grounded element to operate on false quantities To prevent this situation SELOGIC setting E32IV may be used as follows E32IV V1GOOD 32QE The V1GOOD Relay Word bit see Figure 4 1 deasserts during a three phase fault and the 32QE Relay Word bit see Figure 4 6 asserts during a phase to phase fault If either one...

Page 201: ...tion forward 67G1 direction forward 51PT direction forward 51AT direction reverse 51BT direction reverse 51CT direction reverse 51NT nondirectional 51GT direction forward To accomplish this the DIR1 setting is turned off and the corresponding SELOGIC control equation torque control settings for the above overcurrent elements are used to make the elements directional forward or reverse or nondirect...

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Page 203: ...Setting DTT is also used for Direct Underreaching Transfer Trip DUTT schemes TRSOTF Switch Onto Fault Trip Conditions Setting TRSOTF is supervised by the switch onto fault condition SOTFE See Switch Onto Fault SOTF Trip Logic on page 5 7 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 ...

Page 204: ...ip Logic Communications Assisted Trip Logic Unlatch Trip ULTR Other Trips TR Switch Onto Fault Trip Communications Assisted Trip TRSOTF SOTFE ECOMM DCUB1 Direct Transfer Trip Echo Conversion to Trip DTT TRCOMM TRIP Serial Port Command TARGET RESET Pushbutton TAR R ECTT BTX DSTRT UBB Z3RB PTRX ECOMM DCB ECOMM DCUB2 ECOMM POTT Rising Edge Detect Minimum Trip Duration Timer TRGTR 0 TDURD SELOGIC Trip...

Page 205: ...nd the TDURD time Relay Word bit TRIP remains asserted at logical 1 for as long as the output of OR 1 gate remains at logical 1 regardless of other trip logic conditions The Minimum Trip Duration Timer can be set no less than 4 cycles Figure 5 2 Minimum Trip Duration Timer Operation See Bottom of Figure 5 1 The OPEN Command Is No Longer Embedded in Trip Logic In previous firmware versions of the S...

Page 206: ...ed in the SELOGIC control equation setting 79DTL Drive to Lockout in the factory settings See the Note in the Lockout State discussion following Table 6 1 A COMM target LED option for the OPEN command is discussed in Front Panel Target LEDs on page 5 31 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 Minim...

Page 207: ...control is applied to time overcurrent and definite time overcurrent elements Such control is not apparent by mere inspection of trip setting TR or any other SELOGIC control equation trip setting Frequency element 81D1T trips directly Local bit LB3 trips directly operates as a manual trip switch via the front panel See Local Control Switches on page 7 6 for more information on local bits Phase ins...

Page 208: ...101 Unlatch Trip With 52b Circuit Breaker Auxiliary Contact A 52b circuit breaker auxiliary contact is wired to optoisolated input IN101 52A IN101 SELOGIC control equation circuit breaker status setting see Optoisolated Inputs on page 7 2 ULTR IN101 Input IN101 must be energized 52b circuit breaker auxiliary contact has to be closed before the trip logic unlatches and the TRIP Relay Word bit deass...

Page 209: ... SOTF trip logic Refer to the switch onto fault trip logic in Figure 5 1 middle of figure The SOTF trip logic permits tripping if both the following occur An element asserts in SELOGIC control equation trip setting TRSOTF Relay Word bit SOTFE is asserted to logical 1 Relay Word bit SOTFE the output of the SOTF logic provides the effective time window for an element in trip setting TRSOTF e g TRSOT...

Page 210: ...d 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 routed t...

Page 211: ...or a time duration 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 ...

Page 212: ...Trip PUTT Directional Comparison Unblocking DCUB Directional Comparison Blocking DCB Enable Setting ECOMM The POTT PUTT DCUB and DCB tripping schemes are enabled with enable setting ECOMM Setting choices are ECOMM N no communications assisted trip scheme enabled ECOMM POTT POTT or PUTT scheme ECOMM DCUB1 DCUB scheme for two terminal line communications from one remote terminal ECOMM DCUB2 DCUB sch...

Page 213: ...eous overcurrent element 67G2 Level 2 directional residual ground instantaneous overcurrent element 67Q2 Level 2 directional negative sequence instantaneous overcurrent element The exception is a DCB scheme where Level 2 overreaching overcurrent elements set direction forward with a short delay are used instead 67P2S Level 2 directional phase instantaneous overcurrent element with delay 67P2SD 67N...

Page 214: ...nces are how the optoisolated input settings and the trip settings are made The following explanations describe these differences Optoisolated Input Settings Differences Between the SEL 321 and SEL 351 Relays The SEL 351 does not have optoisolated input settings like the SEL 321 Rather the optoisolated inputs of the SEL 351 are available because Relay Word bits are used in SELOGIC control equation...

Page 215: ...tact closure delay Better security through built in channel monitoring Reduced wiring complexity The subsections that follow use traditional communications equipment in the examples If using MIRRORED BITS communications change some of the SELOGIC control equations to use Transmit MIRRORED BITS instead of output contacts and Receive MIRRORED BITS instead of optoisolated inputs Also MIRRORED BITS co...

Page 216: ... 29 to help set up the SEL 351 in a POTT scheme see Communications Assisted Trip Logic General Overview on page 5 10 for more setting comparison information on the SEL 321 SEL 351 relays External Inputs See Optoisolated Inputs on page 7 2 for more information on optoisolated inputs PT1 Received Permissive Trip Signal s In two terminal line POTT applications a permissive trip signal is received fro...

Page 217: ...s in trip setting TRCOMM typically set at 10 cycles Set to OFF to defeat EBLKD ETDPU Echo Time Delay Pickup Sets minimum time requirement for received PT before echo begins typically set at 2 cycles Set to OFF for no echo EDURD Echo Duration Limits echo duration to prevent channel lockup typically set at 3 5 cycles Logic Outputs The following logic outputs can be tested by assigning them to output...

Page 218: ...permissive trip For example SELOGIC control equation setting OUT105 is set OUT105 KEY Output contact OUT105 drives a communications equipment transmitter input in a two terminal line application see Figure 5 8 In a three terminal line scheme output contact OUT107 is set the same as OUT105 see Figure 5 9 OUT107 KEY EKEY Echo Key Permissive Trip Permissive trip signal keyed by Echo logic used in tes...

Page 219: ...t Z3RB Wye Connected Voltages Delta Connected Voltages This entire logic is enabled if setting ECOMM DCUB1 DCUB2 or POTT 0 EDURD 0 EBLKD 0 Z3RBD ETDPU 0 Permissive Trip Weak Infeed Logic Enabled WFC Comm Scheme Trip Settings Loss of Potential SEL OGIC Settings TRCOMM Setting ELOP Y1 LOP 67P3 67N3 67G3 67Q3 3P0 w PT q 27A1 e 27B1 27C1 59N1 27AB r 27BC 27CA 59Q EWFC Y Setting Settings EBLKD OFFFF ET...

Page 220: ...al negative sequence instantaneous overcurrent element instead of with element KEY see Figure 5 8 OUT105 67P1 67N1 67G1 67Q1 Note only use enabled elements If echo keying is desired add the echo key permissive trip logic output as follows OUT105 67P1 67N1 67G1 67Q1 EKEY In a three terminal line scheme output contact OUT107 is set the same as OUT105 see Figure 5 9 Installation Variations Figure 5 9...

Page 221: ...Equipment for a Two Terminal Line POTT Scheme Figure 5 9 Connections to Communications Equipment for a Three Terminal Line POTT Scheme To From Remote Terminal OUT105 OUT105 KEY TX RX RX TX PT1 IN104 SEL 351 Partial IN104 to from remote terminal 1 OUT105 OUT105 KEY OUT107 KEY TX OUT107 RX RX TX to from remote terminal 2 RX TX PT1 IN104 IN106 SEL 351 partial TX IN104 RX IN106 ...

Page 222: ...ic General Overview on page 5 10 for more setting comparison information on the SEL 321 SEL 351 relays External Inputs See Optoisolated Inputs on page 7 2 for more information on optoisolated inputs PT1 PT2 Received Permissive Trip Signal s In two terminal line DCUB applications setting ECOMM DCUB1 a permissive trip signal is received from one remote terminal One optoisolated input on the SEL 351 ...

Page 223: ...ection 9 Setting the Relay for setting ranges GARD1D Guard Present Delay Sets minimum time requirement for reinstating permissive tripping following a loss of channel condition typically set at 10 cycles Channel 1 and 2 logic use separate timers but have this same delay setting UBDURD DCUB Disable Delay Prevents tripping by POTT logic after a settable time following a loss of channel condition typ...

Page 224: ...rison Unblocking DCUB Logic The UBB1 and UBB2 are routed in various combinations in Figure 5 11 to control Relay Word bit UBB depending on enable setting ECOMM DCUB1 or DCUB2 Relay Word bit UBB is the unblock block input into the trip logic in Figure 5 1 When UBB asserts to logical 1 tripping is blocked ...

Page 225: ...B2 q LOG2 PT2 Loss of Guard Input Permissive Trip Input Z3RB from POTT logic Logic enabled if setting ECOMM DCUB2 Logic enabled if setting ECOMM DCUB1 or ECOMM DCUB2 PTRX2 w Loss of Channel UBEND 0 UBDURD 0 0 GARD1D Relay Word Bit Relay Word Bits SEL OGIC Settings UBB1 q LOG1 PT1 Loss of Guard Input Permissive Trip Input PTRX1 w Loss of Channel UBEND 0 UBDURD 0 0 GARD1D SEL OGIC Settings ...

Page 226: ...setting ECOMM DCUB1 or DCUB2 Relay Word bit PTRX is the permissive trip receive input into the trip logic in Figure 5 1 Installation Variations Figure 5 13 shows output contacts OUT105 and OUT107 connected to separate communication equipment for the two remote terminals Both output contacts are programmed the same OUT105 KEY and OUT107 KEY Depending on the installation perhaps one output contact e...

Page 227: ...Figure 5 13 Connections to Communications Equipment for a Three Terminal Line DCUB Scheme Setting ECOMM DCUB2 IN104 IN105 IN106 IN207 OUT105 TRIP RX OUT107 SEL 351 Partial TX RX To From Remote Terminal 1 RX TX GUARD RX TX TRIP RX TX GUARD RX PT1 IN104 LOG1 IN105 PT2 IN106 LOG2 IN207 OUT105 KEY OUT107 KEY To From Remote Terminal 2 ...

Page 228: ...e AG93 06 to help set up the SEL 351 in a DCB scheme see Communications Assisted Trip Logic General Overview on page 5 10 for more setting comparison information on the SEL 321 SEL 351 relays External Inputs See Optoisolated Inputs on page 7 2 for more information on optoisolated inputs BT Received Block Trip Signal s In two terminal line DCB applications a block trip signal is received from one r...

Page 229: ...ntrol equation setting OUT105 is set OUT105 DSTRT Output contact OUT105 drives a communications equipment transmitter input in a two terminal line application see Figure 5 15 In a three terminal line scheme output contact OUT107 is set the same as OUT105 see Figure 5 16 OUT107 DSTRT DSTART includes current reversal guard logic NSTRT Nondirectional Carrier Start Program an output contact to include...

Page 230: ...cts OUT105 OUT106 OUT107 and OUT208 connected to separate communication equipment for the two remote terminals Both output contact pairs are programmed the same OUT105 DSTRT NSTRT OUT107 DSTRT NSTRT OUT106 STOP OUT208 STOP Depending on the installation perhaps one output contact e g OUT105 DSTRT NSTRT can be connected in parallel to both START inputs on the communication equipment in Figure 5 16 T...

Page 231: ...ntrol equation setting BT IN104 IN106 Depending on the installation perhaps one input e g IN104 can be connected in parallel to both communication equipment RX receive output contacts in Figure 5 16 Then setting BT would be programmed as BT IN104 and input IN106 can be used for another function In Figure 5 15 and Figure 5 16 the carrier scheme cutout switch contact 85CO should be closed when the c...

Page 232: ...igure 5 16 Connections to Communications Equipment for a Three Terminal Line DCB Scheme TX IN106 IN104 BT IN104 IN106 SEL 351 Partial RX 85CO To From Remote Terminal 2 STOP START TX TX RX OUT208 TX OUT106 OUT107 OUT105 DSTRT NSTRT OUT106 STOP OUT107 DSTRT NSTRT OUT108 STOP OUT105 RX RX START STOP TX TX To From Remote Terminal 1 ...

Page 233: ... the TRIP target LED still illuminates Thus tripping via the front panel local control local bits serial port remote bits or OPEN command or voltage elements is indicated only by the illumination of the TRIP target LED Table 5 1 Front Panel Target LED Definitions LED Number LED Label Definition 1 EN Relay Enabled see Relay Self Tests on page 13 8 2 TRIP Indication that a trip occurred by overcurre...

Page 234: ...icate 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 1 For example if the OPEN command or remote bit RB1 see CON Command Control Remote Bit on page 10 38 are used to trip via the serial port and they should illuminate the COMM target LED set...

Page 235: ...ctory default settings set with the pickup indicators of the time overcurrent elements Additionally the fault must be present for at least one cycle after the relay trips for reliable targeting This is most noticeable in relay testing when breaker opening times are not included in the test setup SELOGIC control equation setting FAULT also controls other relay functions See SELOGIC Control Equation...

Page 236: ... logic For example refer to the breaker failure logic in Figure 7 26 If a breaker failure trip occurs SV7T asserts the occurrence can be displayed on the front panel with seal in logic and a rotating default display see Rotating Default Display on page 7 36 and Rotating Default Display on page 11 12 also SV8 SV8 SV7T TRGTR DP3 SV8 DP3_1 BREAKER FAILURE DP3_0 NA blank Figure 5 17 Seal in of Breaker...

Page 237: ...A B and C See Front Panel Target LEDs on page 5 31 Demand Metering FAULT is used to suspend demand metering peak recording See Demand Metering on page 8 20 Maximum Minimum Metering FAULT is used to block Maximum Minimum metering updating See Maximum Minimum Metering on page 8 30 Voltage Sag Swell Interruption elements FAULT is used to suspend the calculation of Vbase See Voltage Sag Swell and Inte...

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Page 239: ...settings and logic needed for automatic reclosing besides the final close logic and reclose supervision logic described in the previous subsections The reclose enable setting E79 has setting choices N 1 2 3 4 C1 C2 C3 and C4 Setting E79 N defeats the reclosing relay Setting choices 1 through 4 and C1 through C4 are the number of desired automatic reclosures Setting choices 1 through 4 have the rec...

Page 240: ...79RI is not making a rising edge logical 0 to logical 1 transition A close failure condition does not exist Relay Word bit CF 0 Then the CLOSE Relay Word bit can be asserted to logical 1 if either of the following occurs A reclosing relay open interval times out qualified by SELOGIC control equation setting 79CLS see Figure 6 2 SELOGIC control equation setting CL goes from logical 0 to logical 1 r...

Page 241: ...eaker closes 52A logical 1 The reclose initiation condition 79RI makes a rising edge logical 0 to logical 1 transition The Close Failure Timer times out Relay Word bit CF 1 The Close Failure Timer is inoperative if setting CFD OFF Factory Settings Example The factory settings for the close logic SELOGIC control equation settings are 52A IN101 CL LB4 CC ULCL TRIP The factory setting for the Close F...

Page 242: ...ircuit breaker auxiliary setting 52A is set with numeral 0 52A 0 then the close logic is inoperable Also the reclosing relay is defeated see Reclosing Relay on page 6 12 Circuit Breaker Status Refer to the bottom of Figure 6 1 Note that SELOGIC control equation setting 52A circuit breaker status is available as Relay Word bit 52A This makes for convenience in setting other SELOGIC control equation...

Page 243: ...Reclose Supervision Reclosing Relay Open Interval Timeout qualified by 79CLS Reclosing Relay Open Interval Timeout qualified by 79CLS Reclose Initiate If setting 79CLSD OFF the Reclose Supervision Limit Timer is inoperative and does not time limit the wait for the Reclose Supervision condition 79CLS to assert to logical 1 Reclosing Relay Open Interval Timeout 79RI 79CLSD OFF Lockout Reclose Superv...

Page 244: ...upervision Limit Time setting should be set to zero cycles 79CLSD 0 00 With this setting the logic in the top of Figure 6 2 is operative When an open interval times out the SELOGIC control equation reclose supervision setting 79CLS is checked just once open interval 1 times out open interval 1 times out 1 Open Interval Timer Open Interval Timer Reclose Supervision Limit Timer Reclose Supervision L...

Page 245: ...Applications Bottom of Figure 6 2 and Figure 6 3 For a few unique applications the Reclose Supervision Limit Time setting is not set equal to zero cycles e g 79CLSD 60 00 With this setting the logic in the bottom of Figure 6 2 is operative When an open interval times out the SELOGIC control equation reclose supervision setting 79CLS is then checked for a time window equal to setting 79CLSD If 79CL...

Page 246: ...o the bottom of Figure 6 2 If the reclosing relay open interval time out condition is sealed in it stays sealed in until one of the following occurs The close logic output CLOSE also see Figure 6 2 asserts Relay Word bit CLOSE logical 1 The reclosing relay goes to the Lockout State Relay Word bit 79LO logical 1 The circuit breaker closes 52A logical 1 The reclose initiation condition 79RI makes a ...

Page 247: ...circuit breaker 52 1 first followed by the SEL 351 2 reclosing circuit breaker 52 2 after a synchronism check across circuit breaker 52 2 Figure 6 4 SEL 351 Relays Installed at Both Ends of a Transmission Line in a High Speed Reclose Scheme SEL 351 1 Relay Before allowing circuit breaker 52 1 to be reclosed after an open interval time out the SEL 351 1 checks that Bus 1 voltage is hot and the tran...

Page 248: ...SEL 351 2 is connected to one of these briefly energized phases synchronism check element 25A1 could momentarily assert to logical 1 So that this possible momentary assertion of synchronism check element 25A1 does not cause any inadvertent reclose of circuit breaker 52 2 make sure the open interval timers in the SEL 351 2 are set with some appreciable time greater than the momentary energization t...

Page 249: ...ing RCSF to assert for one processing interval then the reclosing relay goes to the Lockout State If E79 C3 which allows three automatic reclose attempts and the slipping voltages fail to come into synchronism while timer 79CLSD is timing resulting in a reclose supervision failure causing RCSF to assert for one processing interval then the reclosing relay increments the shot counter and starts tim...

Page 250: ...ee Open Interval Timers on page 6 16 Setting choices 1 through 4 also have the reclosing relay go to the Lockout state upon reclose supervision failure refer to Reclose Supervision Logic on page 6 5 Setting choice C1 through C4 similarly are the number of desired automatic reclosures C1 for one reclosure C2 for two reclosures etc Setting choices C1 through C4 however do not have the reclosing rela...

Page 251: ...on Successful Reclose Initiation Successful Reclose Initiation Maintained Lockout Condition The circuit breaker has been closed for a qualifying reset time The SEL 351 is ready to go through an automatic reclosing sequence in the reclose cycle state if the circuit breaker trips open and reclose initiation is successful Relay Word bit 79RS logical 1 Front panel RS LED illuminated The SEL 351 automa...

Page 252: ...in the reclosing relay logic via the factory SELOGIC control equation settings 79DTL OC drive to lockout Relay Word bit OC asserts for execution of the OPEN command See OPE Command Open Breaker on page 10 37 for more information on the OPEN command Also see Drive to Lockout and Drive to Last Shot Settings 79DTL and 79DLS Respectively on page 6 21 If the OPEN command is set to trip TR OC see Note f...

Page 253: ...ection The front panel LEDs RS CY and LO are all extinguished a ready indication that the recloser is defeated Close Logic Can Still Operate When the Reclosing Relay Is Defeated If the reclosing relay is defeated the close logic see Figure 6 1 can still operate if SELOGIC control equation circuit breaker status setting 52A is set to something other than numeral 0 Making the setting 52A 0 defeats t...

Page 254: ...00 00 cycles set to some value other than zero open interval time 79OI3 would still be inoperative because a preceding open interval time is set to zero i e 79OI2 0 00 If open interval 1 time setting 79OI1 is set to zero 79OI1 0 00 cycles no open interval timing takes place and the reclosing relay is defeated The open interval timers time consecutively they do not have the same beginning time refe...

Page 255: ...uit breaker status is determined by the SELOGIC control equation setting 52A See Close Logic on page 6 2 for more discussion on SELOGIC control equation setting 52A Also see Optoisolated Inputs on page 7 2 for more discussion on SELOGIC control equation setting 52A Setting 79RSD Qualifies closures when the relay is in the Reclose Cycle State These closures are usually automatic reclosures resultin...

Page 256: ...N asserts to logical 1 If the reset timer is not timing RSTMN deasserts to logical 0 See Block Reset Timing Setting 79BRS on page 6 25 Reclosing Relay Shot Counter Refer to Figure 6 6 The shot counter increments for each reclose operation For example when the relay is timing on open interval 1 79OI1 it is at shot 0 When the open interval times out the shot counter increments to shot 1 and so forth...

Page 257: ...tant of the first trip of the auto reclose cycle in order for the SEL 351 to successfully initiate reclosing and start timing on the first open interval The SEL 351 is not yet in the reclose cycle state 79CY logical 0 at the instant of the first trip Then for any subsequent trip operations in the auto reclose cycle the SEL 351 is in the reclose cycle state 79CY logical 1 and the SEL 351 successful...

Page 258: ...g enough setting of the Minimum Trip Duration Timer TDURD the TRIP Relay Word bit will still be asserted to logical 1 when the circuit breaker opens see Figure 5 1 and Figure 5 2 If the TRIP Relay Word bit is at logical 0 TRIP logical 0 when the circuit breaker opens logical 1 to logical 0 transition the relay goes to the Lockout State This helps prevent reclose initiation for circuit breaker open...

Page 259: ...k to 79DTL logical 0 This is useful for situations where both of the following are true Any of the trip and drive to lockout conditions are pulsed conditions e g the OPEN command Relay Word bit OC asserts for only 1 4 cycle refer to Factory Settings Example on page 6 21 Reclose initiation is by the breaker contact opening e g 79RI 52A refer to Additional Settings Example on page 6 20 Then the driv...

Page 260: ...e greater than or equal to shot 1 79DLS 79LO logical 1 Thus if optoisolated input IN102 reclose enable switch is in the disable reclosing position Relay Word bit IN102 logical 0 or local bit LB3 manual trip switch is operated then the relay is driven to the Lockout State by setting 79DTL and subsequently last shot by setting 79DLS Additional Settings Example 1 The preceding drive to lockout factor...

Page 261: ... setting 79STL If 79STL logical 1 open interval timing is stalled If 79STL logical 0 open interval timing can proceed If an open interval time has not yet started timing 79STL logical 1 still the 79SKP setting is still processed In such conditions open interval timing has not yet started timing if 79SKP logical 1 the relay increments the shot counter to the next shot and then loads the open interv...

Page 262: ...erval 1 time is skipped and open interval timing proceeds on the following open interval 2 time Once the shot is incremented to shot 1 Relay Word bit SH0 logical 0 and then setting 79SKP logical 0 regardless of Relay Word bit 50P2 Additional Settings Example 2 If the SEL 351 Relay is used on a feeder with a line side independent power producer cogenerator the utility should not reclose into a line...

Page 263: ...g on how setting 79BRS is set none one or both of these reset times can be controlled If the reset timer is timing and then 79BRS asserts to 79BRS logical 1 reset timing is stopped and does not begin timing again until 79BRS deasserts to 79BRS logical 0 When reset timing starts again the reset timer is fully loaded Thus successful reset timing has to be continuous Use the RSTMN Relay Word bit to m...

Page 264: ...resultant shot counter elements In order for the sequence coordination setting 79SEQ to increment the shot counter both the following conditions must be true No trip present Relay Word bit TRIP logical 0 Circuit breaker closed SELOGIC control equation setting 52A logical 1 effectively The sequence coordination setting 79SEQ is usually set with some overcurrent element pickups If the above two cond...

Page 265: ...oser Assume that the line recloser is set to operate twice on the fast curve and then twice on the slow curve The slow curve is allowed to operate after two fast curve operations because the fast curves are then inoperative for tripping The SEL 351 phase time overcurrent element 51PT is coordinated with the line recloser fast curve The SEL 351 single phase time overcurrent elements 51AT 51BT and 5...

Page 266: ...he line recloser recloses its circuit breaker the line recloser slow curve operates to clear the fault The relay does not operate on its faster set phase time overcurrent element 51PT 51PT is below the line recloser slow curve because the shot counter is now at shot 2 For this sequence coordination scheme the SELOGIC control equation trip equation is TR 51PT SH0 SH1 51AT 51BT 51CT With the shot co...

Page 267: ...equal to or greater than last shot and the relay trips it goes to the Lockout State To avoid this problem make the following sequence coordination setting 79SEQ 79RS 51P SH0 Refer to Figure 6 10 If the SEL 351 is in the Reset State 79RS logical 0 with the shot counter reset shot 0 SH0 logical 1 and then a permanent fault beyond the line recloser occurs fault current IF in Figure 6 8 the line reclo...

Page 268: ... 0 The shot counter stays at shot 1 Thus if there is a coincident fault between the SEL 351 and the line recloser the SEL 351 will operate on 51AT 51BT or 51CT and then reclose once instead of going straight to the Lockout State shot 1 last shot 2 As stated earlier the reset time setting 79RSD takes the shot counter back to shot 0 after a sequence coordination operation increments the shot counter...

Page 269: ...SV1 SV1T SV16 SV16T Output Contacts on page 7 32 OUT101 OUT107 and ALARM models 0351x0 0351x1 and 0351xY OUT201 OUT212 models 0351x1 and 0351xY Rotating Default Display on page 7 36 display points DP1 DP16 The above items are all the logic input output of the relay They are combined with the overcurrent voltage frequency and reclosing elements in SELOGIC control equation settings to realize numero...

Page 270: ...ltage to the appropriate terminal pair see Figure 1 2 Figure 1 4 and Figure 2 2 Figure 2 4 Figure 7 1 is used for following discussion examples The optoisolated inputs in Figure 7 2 operate similarly Figure 7 1 Example Operation of Optoisolated Inputs IN101 IN106 Models 0351x0 0351x1 and 0351xY Open IN101 IN101 Logical 0 De energized Opto isolated Inputs Example Switch States Built in Debounce Tim...

Page 271: ...e threshold and not deasserting until sixteen successive 1 16 cycle samples are lower than the optoisolated input voltage threshold For most dc applications the input pickup dropout debounce timers should be set in 1 4 cycle increments For example in the factory default settings all the optoisolated input pickup dropout debounce timers are set at 1 2 cycle e g IN104 0 50 See SHO Command Show View ...

Page 272: ...ions Factory Settings Examples Figure 7 3 Circuit Breaker Auxiliary Contact and Reclose Enable Switch Connected to Optoisolated Inputs IN101 and IN102 The functions for inputs IN101 and IN102 are described in the following discussions Input IN101 Relay Word bit IN101 is used in the factory settings for the SELOGIC control equation circuit breaker status setting 52A IN101 Connect input IN101 to a 5...

Page 273: ...2 Connect input IN102 to a reclose enable switch When the reclose enable switch is open input IN102 is de energized and the reclosing relay is driven to lockout 79DTL IN102 NOT IN102 NOT logical 0 logical 1 When the reclose enable switch is closed input IN102 is energized and the reclosing relay is enabled if no other setting condition is driving the reclosing relay to lockout 79DTL IN102 NOT IN10...

Page 274: ...cal control switch the local control switch positions are enabled by making corresponding label settings Note the first setting in Table 7 1 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 Loca...

Page 275: ... LBn logical 1 position for one processing interval 1 4 cycle Figure 7 7 Local Control Switch Configured as an ON OFF MOMENTARY Switch Disable local control switches by nulling out all the label settings for that switch see Section 9 Setting the Relay The local bit associated with this disabled local control switch is then fixed at logical 0 Logical 1 LBn n 1 through 16 ON Position OFF Position Lo...

Page 276: ... reclosing relay to lockout for a manual trip see Section 6 Close and Reclose Logic 79DTL LB3 Figure 7 9 Configured Manual Close Switch Drives Local Bit LB4 Local bit LB4 is set to close the circuit breaker in the following SELOGIC control equation setting CL LB4 SELOGIC control equation setting CL is for close conditions other than automatic reclosing or serial port CLOSE command see Figure 6 1 L...

Page 277: ...erted 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 control switch positions remain unchanged If a local bit is routed to a programmable output contact and control power is lost the state of the local bit is stored in nonvolatile memory but ...

Page 278: ...on following Figure 7 15 Pulse momentarily operate the remote bits for this application Remote Bit States Not Retained When Power Is Lost The states of the remote bits Relay Word bits RB1 RB16 are not retained if power to the relay is lost and then restored The remote control switches always come back in the OFF position corresponding remote bit is deasserted to logical 0 when power is restored to...

Page 279: ...Remote control switch 3 is then placed in the OFF position If RB3 is initially at logical 0 pulsing it with the CON 3 command and PRB 3 subcommand will change RB3 to a logical 1 for one processing interval and then return it to a logical 0 In this situation the RB3 rising edge operator will also assert for one processing interval followed by the RB3 falling edge operator one processing interval la...

Page 280: ...et the latching relay output contact Often the external contacts wired to the latching relay inputs are from remote control equipment e g SCADA RTU Figure 7 11 Traditional Latching Relay The sixteen 16 latch control switches in the SEL 351 provide latching relay type functions Figure 7 12 Latch Control Switches Drive Latch Bits LT1 LT16 The output of the latch control switch in Figure 7 12 is a Re...

Page 281: ... relay The SCADA contact is not maintained just pulsed to enable disable the reclosing relay Figure 7 13 SCADA Contact Pulses Input IN104 to Enable Disable Reclosing Relay If the reclosing relay is enabled and the SCADA contact is pulsed the reclosing relay is then disabled If the SCADA contact is pulsed again the reclosing relay is enabled again The control operates in a cyclic manner pulse to en...

Page 282: ...a few cycles and each individual assertion of input IN104 should only change the state of the latch control switch once e g latch bit LT1 changes state from logical 0 to logical 1 For example in Figure 7 14 if LT1 logical 0 input IN104 is routed to setting SET1 as discussed previously SET1 IN104 rising edge of input IN104 If input IN104 is then asserted for a few cycles by the SCADA contact see Pu...

Page 283: ...e operated through the serial port See Figure 7 10 and Section 10 Serial Port Communications and Commands for more information on remote bits These are just a few control logic examples many variations are possible Latch Control Switch States Retained Power Loss The states of the latch bits LT1 LT16 are retained if power to the relay is lost and then restored If a latch bit is asserted e g LT2 log...

Page 284: ... can be reset to logical 0 right after a settings group change using SELOGIC control equation setting RSTn n 1 through 16 Relay Word bits SG1 SG6 indicate the active setting Group 1 through 6 respectively see 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 ...

Page 285: ...receding reclosing relay enable disable example application Figure 7 14 and Figure 7 15 the SCADA 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 SCADA contact Another variation to the example app...

Page 286: ...ol Logic Latch Control Switches Figure 7 18 Latch Control Switch With Time Delay Feedback Operation Time Line RST1 IN104 SV6T IN104 IN104 SET1 IN104 SV6T Rising Edge One Processing Interval SV6DO SV6PU Pulse 1 Pulse 2 Pulse 3 Pulse 4 Rising Edge Rising Edge No Effect No Effect Rising Edge SV6 LT1 SV6T ...

Page 287: ...on settings SS1 SS6 have priority over the serial port GROUP command and the front panel GROUP pushbutton in selecting the active setting group Operation of SELOGIC Control Equation Settings SS1 SS6 Each setting group has its own set of SELOGIC control equation settings SS1 SS6 Table 7 3 Definitions for Active Setting Group Indication Relay Word Bits SG1 Through SG6 Relay Word Bit Definition SG1 I...

Page 288: ...rial port GROUP command or the front panel GROUP pushbutton can be used to switch the active setting group See Section 10 Serial Port Communications and Commands for more information on the serial port GROUP command See Section 11 Front Panel Interface for more information on the front panel GROUP pushbutton Relay Disabled Momentarily During Active Setting Group Change The relay is disabled for a ...

Page 289: ...ogic is implemented in the SELOGIC control equation settings in Table 7 5 SELOGIC control equation timer input setting SV8 in Table 7 5 has logic output SV8T shown in operation in Figure 7 20 for both setting Groups 1 and 4 Figure 7 20 SELOGIC Control Equation Variable Timer SV8T Used in Setting Group Switching Table 7 5 SELOGIC Control Equation Settings for Switching Active Setting Group Between ...

Page 290: ...ion of setting SS4 Optoisolated input IN105 also has its own built in debounce timer IN105D available see Figure 7 1 Note that Figure 7 21 shows both setting Group 1 and setting Group 4 settings The setting Group 1 settings top of Figure 7 21 are enabled only when setting Group 1 is the active setting group and likewise for the setting Group 4 settings at the bottom of the figure Setting Group 4 i...

Page 291: ...ns as shown in Table 7 6 The SEL 351 can be programmed to operate similarly Use three optoisolated inputs to switch between the six setting groups in the SEL 351 In this example optoisolated inputs IN101 IN102 and IN103 on the relay are connected to a rotating selector switch in Figure 7 22 TGR SV8PU SV8PU 4 1 SV8 SG1 TGR 1 SV8 SG4 SV8T SS1 IN105 SV8T Active Setting Group SV8T SS4 IN105 SV8T Setti...

Page 292: ...G3 logical 1 Inputs IN101 and IN102 are energized and IN103 is de energized SS3 IN103 IN102 IN101 NOT IN103 IN102 IN101 NOT logical 0 logical 1 logical 1 logical 1 To get from position 3 to position 5 on the selector switch the switch passes through position 4 The switch is only briefly in position 4 SS4 IN103 IN102 IN101 IN103 NOT IN102 NOT IN101 logical 1 NOT logical 0 NOT logical 0 logical 1 bu...

Page 293: ...ogical 1 logical 1 To get from position 5 to position REMOTE on the selector switch the switch passes through the positions 4 3 2 and 1 The switch is only briefly in these positions but not long enough to be qualified by time setting TGR in order to change the active setting group to any one of these setting groups Selector Switch Now Rests on Position REMOTE Refer to Figure 7 23 If the selector s...

Page 294: ...ored 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 momentarily disabled If the indi...

Page 295: ... limit can result in an EEPROM self test failure An average of one 1 setting group change per day can be made for a 25 year relay service life This requires that SELOGIC control equation settings SS1 through SS6 see Table 7 4 be set with care Settings SS1 SS6 cannot result in continuous cyclical changing of the active setting group Time setting TGR qualifies settings SS1 SS6 before changing the ac...

Page 296: ...have a setting range of a little over 4 5 hours 0 00 999999 00 cycles in 0 25 cycle increments Timers SV7T SV16T in Figure 7 25 have a setting range of almost 4 5 minutes 0 00 16000 00 cycles in 0 25 cycle increments These timer setting ranges apply to both pickup and dropout times SVnPU and SVnDO n 1 through 16 Figure 7 24 SELOGIC Control Equation Variables Timers SV1 SV1T Through SV6 SV6T SV1T S...

Page 297: ... setting SV1DO is set for a 2 cycle dropout SV1DO 2 cycles The output of the timer Relay Word bit SV1T operates output contact OUT103 OUT103 SV1T Additional Settings Example 1 Another application idea is dedicated breaker failure protection see Figure 7 26 SV6 IN101 breaker failure initiate SV7 SV7 IN101 50P1 50N1 OUT101 SV6T retrip OUT102 SV7T breaker failure trip SV7T SV7 SV7 SV7PU SV7D0 SV8 SV8...

Page 298: ...d for extra time if needed after the breaker failure logic unlatches fault detectors 50P1 and 50N1 dropout Note that Figure 7 26 suggests the option of having output contacts OUT103 and OUT104 operate as additional breaker failure trip outputs This is done by making the following SELOGIC control equation settings OUT103 SV7T breaker failure trip OUT104 SV7T breaker failure trip Additional Settings...

Page 299: ...it SV7 SELOGIC control equation variable SV7 in SELOGIC control equation SV7 SV7 SV7 IN101 50P1 50N1 If power is lost to the relay settings are changed for the active setting group or the active setting group is changed the seal in logic circuit is broken by virtue of Relay Word bit SV7 being reset to logical 0 assuming input IN101 is not asserted Relay Word bit SV7T is also reset to logical 0 and...

Page 300: ...ripping manual tripping see Section 5 Trip and Target Logic OUT102 CLOSE automatic reclosing manual closing see Section 6 Close and Reclose Logic OUT103 SV1T breaker failure trip see SELOGIC Control Equation Variables Timers on page 7 28 OUT104 0 output contact OUT104 not used set equal to zero OUT107 0 output contact OUT107 not used set equal to zero Operation of Output ContactsforDifferent Outpu...

Page 301: ...t type a or b the ALARM output contact closes or opens as demonstrated in Figure 7 27 An a type output contact is open when the output contact coil is de energized and closed when the output contact coil is energized A b type output contact is closed when the output contact coil is de energized and open when the output contact coil is energized To verify ALARM output contact mechanical integrity e...

Page 302: ...Models 0351x0 0351x1 and 0351xY Open OUT101 a De energized Logical 0 OUT101 OUT101 PULSE OUT101 Output Contact Coil States SELOGIC Control Equations Settings Relay Word Bits Example Relay Word Bits States Serial Port Commands see q Output Contacts and example contact types see w Output Contact Terminal States Closed OUT102 a Energized Logical 1 OUT102 OUT102 PULSE OUT102 Open OUT103 a De energized...

Page 303: ...01 PULSE OUT201 Output Contact Coil States SELOGIC Control Equations Settings Relay Word Bits Example Relay Word Bits States Serial Port Commands see q Output Contacts and example contact types see w Output Contact Terminal States Closed OUT202 a Energized Logical 1 OUT202 OUT202 PULSE OUT202 Open OUT203 a De energized Logical 0 OUT203 OUT203 PULSE OUT203 Open OUT204 a De energized Logical 0 OUT20...

Page 304: ...etting Figure 7 29 Traditional Panel Light Installations Note that Figure 7 29 corresponds to Figure 7 3 factory input settings example Reclosing Relay Status Indication In Figure 7 29 the 79 ENABLED panel light illuminates when the 79 Enable switch is closed When the 79 Enable switch is open the 79 ENABLED panel light extinguishes and it is understood that the reclosing relay is disabled Circuit ...

Page 305: ...unications and Commands These text settings are displayed on the SEL 351 front panel display on a time variable rotation using Global setting SCROLD see Rotating Default Display on page 11 12 for more specific operation information The following factory settings examples use Relay Word bits 52A and IN102 in the display points settings Local bits LB1 LB16 latch bits LT1 LT16 remote bits RB1 RB16 se...

Page 306: ..._0 on the front panel display Circuit Breaker Status Indication Make SELOGIC control equation display point setting DP2 and 52A 52A IN101 see Figure 7 3 DP2 52A Make corresponding complementary text settings DP2_1 BREAKER CLOSED DP2_0 BREAKER OPEN Display point setting DP2 controls the display of the text settings Circuit Breaker Closed In Figure 7 30 optoisolated input IN101 is energized when the...

Page 307: ...oisolated input IN101 is energized when the 52a circuit breaker auxiliary contact is open resulting in 52A IN101 logical 1 DP2 52A logical 1 This results in the display of corresponding text setting DP2_1 on the front panel display Circuit Breaker Open In Figure 7 30 optoisolated input IN101 is de energized when the 52a circuit breaker auxiliary contact is open resulting in 52A IN101 logical 0 DP2...

Page 308: ...available separately in each setting group The corresponding text settings DPn_1 and DPn_0 are made only once and used in all setting groups Refer to Figure 7 30 and the following example setting group switching discussion Setting Group 1 is the Active Setting Group When setting Group 1 is the active setting group optoisolated input IN102 operates as a reclose enable disable switch with the follow...

Page 309: ...g relay permanently driven to lockout DP1 0 set directly to logical 0 Text settings remain the same for all setting groups DP1_1 79 ENABLED displayed when DP1 logical 1 DP1_0 79 DISABLED displayed when DP1 logical 0 Because SELOGIC control equation display point setting DP1 is always at logical 0 the corresponding text setting DP1_0 continually displays in the rotating default displays Additional ...

Page 310: ...ch display setting is displayed DPn_0 or DPn_1 depending on the logic state logical 0 or 1 of corresponding logic setting DPn Values Displayed for Incorrect Settings If the display point setting does not match the correct format using the leading two character sequence followed by the correct mnemonic the relay will display the setting text string as it was actually entered without substituting th...

Page 311: ...ically as in this example Magnitudes less than 10 display with three digits behind the decimal point Magnitudes greater than or equal to 10 display with two or fewer digits behind the decimal point IAPK IBPJ IA x xxxA yyy IA 8 372A 0 IA 52 37A 0 IB 635 8A 120 IC 1173A 120 Table 7 8 Mnemonic Settings for Metering on the Rotating Default Display Sheet 1 of 4 Mnemonic Display Description IA I A x x x...

Page 312: ... y º VCA input voltage IADEM I A D E M x x x x x IA demand current IAPK I A P E A K x x x x x IA peak demand current IBDEM I B D E M x x x x x IB demand current IBPK I B P E A K x x x x x IB peak demand current ICDEM I C D E M x x x x x IC demand current ICPK I C P E A K x x x x x IC peak demand current INDEM I N D E M x x x x x IN demand current INPK I N P E A K x x x x x IN peak demand current I...

Page 313: ... x x x A phase peak demand megavars out MVRBDOa M V R B O D E M x x x x B phase demand megavars out MVRBPOa M V R B O P K x x x x B phase peak demand megavars out MVRCDOa M V R C O D E M x x x x C phase demand megavars out MVRCPOa M V R C O P K x x x x C phase peak demand megavars out MVR3DO M V R 3 O D E M x x x x three phase demand megavars out MVR3PO M V R 3 O P K x x x x three phase peak deman...

Page 314: ...ill set the EXTTR INTTR INTIA EXTIA and WEARA to display in the rotating default display Set the following Setting DPn 0 and using the DPn_0 in the text settings allows the setting to permanently 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 previously the LCD will show the following MV...

Page 315: ... the factory default settings for 51PP and CTR setting DP1_0 51PP will display 720 00 A pri EXT TRIPS XXXXX INT TRIPS XXXXX INT IA XXXXXX kA EXT IA XXXXXX kA WEAR A XXX Table 7 9 Mnemonic Settings for Breaker Wear Monitor Values on the Rotating Default Display Mnemonic Display Description BRKDAT R S T D A T m m d d y y last reset date BRKTIM R S T T I M h h m m s s last reset time INTTR I N T T R ...

Page 316: ...ay subject to the number of available display points Displaying Time Overcurrent Elements Example This example demonstrates use of the rotating display to show time overcurrent elements in primary units This example will set the 51PP and 51NP to display in the rotating default display Set the following Setting DPn 0 and using the DPn_0 in the text settings allows the setting to permanently rotate ...

Page 317: ...or low XXX is an optional pre label consisting of any characters that you wish to add for labeling the setting value signifies an optional for the control string to make more characters available for labeling purposes The label character count is the sum of the characters used in the pre and post labels For example three characters at the beginning and three characters at the end of the string equ...

Page 318: ...two post characters B 1 The maximum number of label characters is six so the B1 will be ignored The relay setting to be displayed is 51GP as indicated after the control string SET T DP2_0 N SEQ 51QP A The characters for DP2_0 consist of six pre characters N S E Q and one post character A The A will be ignored The relay setting to be displayed is 51QP as indicated after the control string When IN10...

Page 319: ...ing values The post character s A in this case are ignored Examples With control strings Use the control string to decrease the display resolution and make more characters available for labeling purposes Use the table above to determine the appropriate numerical setting variable The following setting example allows 9 characters of label text SET L DP1 IN101 SET L DP2 IN101 SET T DP1_0 51THXYZ 000 ...

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Page 321: ... DC Battery Monitor on page 8 15 In addition to instantaneous metering the SEL 351 metering functions include Demand Metering on page 8 20 Energy Metering on page 8 29 Maximum Minimum Metering on page 8 30 Synchrophasor Metering on page 8 32 The SEL 351 5 and SEL 351 6 relays offer a particular reporting feature Load Profile Report Available in Firmware Versions 6 and 7 on page 8 33 This section e...

Page 322: ...ple of breaker maintenance information for a 25 kV circuit breaker The 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 351 breaker monitor three set points are entered Set Point 1 maximum number of close open operations with corresponding current inte...

Page 323: ...ring and Load Profile Functions Breaker Monitor Figure 8 1 Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker 10 000 1000 2 3 4 5 6 7 8 9 100 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 50 40 30 20 10 5 Number of Close Open Operations kA Interrupted per Operation ...

Page 324: ...be from an in between breaker maintenance point in the breaker maintenance information in Table 8 1 andFigure 8 1 but it does not have to be Set point KASP2 COSP2 should be set to provide the best curve fit with the plotted breaker maintenance points in Figure 8 1 Each phase A B and C has its own breaker maintenance curve like that in Figure 8 2 because the separate circuit breaker interrupting co...

Page 325: ...e breaker maintenance curve levels off horizontally below set point KASP1 COSP1 This is the close open operation limit of the circuit breaker COSP1 10000 regardless of interrupted current value 10 000 100 1000 2 3 4 5 6 7 8 9 100 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 50 40 30 20 10 5 Number of Close Open Operations kA Interrupted per Operation KASP1 1 2 COSP1 10000 KASP2 8 0 COSP2 1...

Page 326: ...current values and applies them to the breaker monitor maintenance curve and the breaker monitor accumulated currents trips As detailed in Figure 8 3 the breaker monitor actually reads in the current values 1 5 cycles after the assertion of BKMON This helps especially if an instantaneous trip occurs The instantaneous element trips when the fault current reaches its pickup setting level The fault c...

Page 327: ...5 Percent to 50 Percent Breaker Wear Refer to Figure 8 6 The current value changes from 2 5 kA to 12 0 kA 12 0 kA is interrupted 11 times 11 close open operations 24 13 pushing the breaker maintenance curve from the 25 percent wear level to the 50 percent wear level Compare the 100 percent and 50 percent curves and note that for a given current value the 50 percent curve has only 1 2 of the close ...

Page 328: ...r Metering and Load Profile Functions Breaker Monitor Figure 8 4 Breaker Monitor Accumulates 10 Percent Wear 10 000 100 10 1000 2 3 4 5 6 7 8 9 100 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 50 40 30 20 10 5 Number of Close Open Operations kA Interrupted per Operation ...

Page 329: ...Metering and Load Profile Functions Breaker Monitor Figure 8 5 Breaker Monitor Accumulates 25 Percent Wear 10 000 100 10 1000 2 3 4 5 6 7 8 9 100 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 50 40 30 20 10 5 Number of Close Open Operations kA Interrupted per Operation 25 ...

Page 330: ... Metering and Load Profile Functions Breaker Monitor Figure 8 6 Breaker Monitor Accumulates 50 Percent Wear 10 000 100 1000 2 3 4 5 6 7 8 9 100 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 50 40 30 20 10 5 Number of Close Open Operations kA Interrupted per Operation 25 50 ...

Page 331: ...rcent Wear Breaker Monitor Output When the breaker maintenance curve for a particular phase A B or C reaches the 100 percent wear level see Figure 8 7 a corresponding Relay Word bit BCWA BCWB or BCWC asserts 10 000 100 1000 2 3 4 5 6 7 8 9 100 2 3 4 5 6 7 8 9 10 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 50 40 30 20 10 5 Number of Close Open Operations kA Interrupted per Operation 50 ...

Page 332: ...wear for each phase Date when the preceding items were last reset via the BRE R command See BRE n Command Preload Reset Breaker Wear on page 10 34 The BRE W command allows the trip counters accumulated values and percent breaker wear to be preloaded for each individual phase The BRE R command resets the accumulated values and the percent wear for all three phases For example if breaker contact wea...

Page 333: ...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 logical 0 the current and trip count information is accumulated under externally initiated trips Ext Trips Regardless of whether the current and trip count information is accumulated under relay initiated trips o...

Page 334: ... This is because when BKMON is newly asserted input IN106 energized the TRIP Relay Word bit is asserted Thus the current and trip count information is accumulated under relay initiated trips Rly Trips If the control switch trip or some other external trip asserts energizing the trip bus the breaker monitor will deem it an externally initiated trip This is because when BKMON is newly asserted input...

Page 335: ...his range allows the SEL 351 to monitor nominal battery voltages of 24 48 110 125 220 and 250 V When testing the pickup settings DCLOP and DCHIP do not operate the SEL 351 outside of its power supply limits See the Specifications subsection General on page 1 13 for the various power supply specifications The power supply rating is located on the serial number sticker on the relay rear panel Figure...

Page 336: ...wer all output contacts deassert on total loss of power Thus the resultant dc voltage element at the bottom of Figure 8 10 would probably be a better choice see following discussion DCLO DCHI Bottom of Figure 8 10 Output contact OUT106 asserts when DCHIP Vdc DCLOP Pickup settings DCLOP and DCHIP are set such that output contact OUT106 asserts when dc battery voltage stays between allowable limits ...

Page 337: ...s open a type output contact closed b type output contact Additional Application Other than alarming the dc voltage elements can be used to disable reclosing For example if the station dc batteries have a problem and the station dc battery voltage is declining drive the reclosing relay to lockout 79DTL SV4T NOT SV4T Timer output SV4T is from the bottom of Figure 8 10 When dc voltage falls below pi...

Page 338: ...served in column Vdc in the event report Station DC Battery Voltage Dips During Circuit Breaker Closing To generate an event report when the SEL 351 closes the circuit breaker make the SELOGIC control equation event report generation setting ER OUT102 In this example output contact OUT102 is set to close OUT102 CLOSE CLOSE is the logic output of Figure 6 1 Anytime output contact OUT102 closes and ...

Page 339: ...wered by ac voltage when powering the relay with ac voltage the dc voltage elements in Figure 8 9 see the average of the sampled ac voltage powering the relay which is very near zero volts as displayed in column Vdc in event reports Thus pickup settings DCLOP and DCHIP should be set off DCLOP OFF DCHIP OFF They are of no real use If a raw event report is displayed with the EVE R command column Vdc...

Page 340: ...lues Depending on enable setting EDEM these demand and peak demand values are thermal demand or rolling demand values The differences between thermal and rolling demand metering are explained in the following discussion Comparison of Thermal and Rolling Demand 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...

Page 341: ...M THM The response of the thermal demand meter in Figure 8 11 middle to the step current input top is analogous to the series RC circuit in Figure 8 12 Thermal Demand Meter Response EDEM THM Thermal Demand Current per unit 0 0 5 10 15 0 5 0 9 1 0 Time Minutes Rolling Demand Meter Response EDEM ROL Rolling Demand Current per unit DMTC 15 minutes 0 0 5 10 15 33 67 1 0 Time Minutes Step Current Input...

Page 342: ... value 1 0 per unit after a time period equal to setting DMTC 15 minutes referenced to when the step current input is first applied The SEL 351 updates thermal demand values approximately every two seconds Rolling Demand Meter Response EDEM ROL The response of the rolling demand meter in Figure 8 11 bottom to the step current input top is calculated with a sliding time window arithmetic average ca...

Page 343: ... into the following five minute totals Rolling demand meter response at Time 5 minutes 1 0 3 0 33 per unit Time 10 Minutes The three five minute intervals in the sliding time window at Time 10 minutes each integrate into the following five minute totals Rolling demand meter response at Time 10 minutes 2 0 3 0 67 per unit Five Minute Totals Corresponding Five Minute Interval 0 0 per unit 15 to 10 m...

Page 344: ...tes 1 0 per unit 5 to 10 minutes 1 0 per unit 10 to 15 minutes 3 0 per unit 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 0 50 16 00 A 5 A nominal 0 10 3 20 A 1 A nominal Additional ranges for NDEMP 0 005 0 640 A 0 2 A nominal c...

Page 345: ...ed with the following settings from Table 8 3 pertinent residual ground overcurrent element settings and SELOGIC control equation torque control setting 51GTC EDEM THM DMTC 5 GDEMP 1 0 51GP 1 50 50G5P 2 30 51GTC GDEM GDEM 50G5 Refer to Figure 8 13 Figure 8 14 and Figure 3 19 PDEM Relay Word Bits Demand Current Pickup Settings A Secondary IB DEM IA DEM IA IC DEM IN DEM Demand Currents Instantaneous...

Page 346: ... 51GP 1 50 A secondary If a ground fault occurs the residual ground time overcurrent element 51GT operates with the sensitivity provided by pickup 51GP 1 50 A secondary The thermal demand meter even with setting DMTC 5 minutes does not respond fast enough to the ground fault to make a change to the effective residual ground time overcurrent element pickup it remains at 1 50 A secondary Demand mete...

Page 347: ...in 51GP 1 50 A secondary View or Reset Demand Metering Information Via Serial Port See MET Command Metering Data on page 10 19 The MET D command displays demand and peak demand metering for the following values The MET RD command resets the demand metering values The MET RP command resets the peak demand metering values If setting EDEM ROL after resetting the demand values there may be a delay of ...

Page 348: ...er day it overwrites the previous stored value if it is exceeded Should the relay lose control power it will restore the peak demand values saved by the relay at 23 50 hours on the previous day Demand metering peak recording is momentarily suspended when SELOGIC control equation setting FAULT is asserted logical 1 See the explanation for the FAULT setting in Maximum Minimum Metering on page 8 30 ...

Page 349: ...a the front panel METER pushbutton See Figure 11 2 Energy Metering Updating and Storage The SEL 351 updates energy values approximately every two seconds The relay stores energy values to nonvolatile storage once per day it overwrites the previous stored value Should the relay lose control power it will restore the energy values saved by the relay at 23 50 hours on the previous day Accumulated ene...

Page 350: ... the front panel METER pushbutton See Figure 11 2 Maximum Minimum Metering Update and Storage The maximum minimum metering function is intended to reflect normal load variations rather than fault conditions or outages Therefore the SEL 351 updates maximum minimum values only if SELOGIC control equation setting FAULT is deasserted logical 0 and has been deasserted for at least 3600 cycles Currents ...

Page 351: ...ee voltages VA B C or VAB BC CA are above threshold The metering value is above the previous maximum or below the previous minimum for approximately four seconds The SEL 351 stores maximum minimum values to nonvolatile storage once per day and overwrites the previous stored value if that is exceeded If the relay loses control power it will restore the maximum minimum values saved at 23 50 hours on...

Page 352: ...le Functions Synchrophasor Metering Synchrophasor Metering View Synchrophasor Metering Information Via Serial Port See MET Command Metering Data on page 10 19 The MET PM command displays the synchrophasor measurements For more information see View Synchrophasors by Using the MET PM Command on page L 12 ...

Page 353: ...broken delta voltage magnitude IG I1 3I2 V1 V2 Sequence current and voltage magnitudes 3V0 Zero sequence voltage magnitude wye connected only VDC Battery voltage FREQ Phase frequency MWA MWB MWC Phase megawatts wye connected only MW3 Three phase megawatts MVARA MVARB MVARC Phase megaVARs wye connected only MVAR3 Three phase megaVARs PFA PFB PFC Phase power factor wye connected only PF3 Three phase...

Page 354: ...ecords in the load buffer If the command is entered with a single numeric parameter a i e LDP 10 the relay displays the most recent a records in the buffer If the command is entered with two numeric parameters a b i e LDP 10 20 the relay displays load buffer records a through b If the command is entered with a single data parameter a i e LDP 7 7 96 the relay displays all load buffer records for th...

Page 355: ...luding rows 47 and 22 are displayed if they exist They display with the newest row row 22 at the beginning top of the report and the oldest row row 47 at the end bottom of the report Reverse chronological progression through the report is down the page and in ascending row number LDP 3 30 97 If LDP is entered with one date following it date 3 30 97 in this example all the rows on that date are dis...

Page 356: ...ays maximum number of days of data the relay may acquire with the present settings before data overwrite will occur LDP D Enter There is room for a total of 45 days of data in the load profile buffer with room for 21 days of data remaining Clearing the Load Profile Buffer Clear the load profile report from nonvolatile memory with the LDP C command as shown in the following example LDP C Enter Clea...

Page 357: ... SET L 6 and report settings SET R will be lost and will need to be re entered The relay will provide two confirmation prompts prior to accepting a change to either PTCONN or VSCONN See Delta Connected Voltages Global Setting PTCONN DELTA on page 2 13 and Broken Delta VS Connection Global Setting VSCONN 3V0 on page 2 14 Applications that use wye connected PTs and have no external zero sequence vol...

Page 358: ...9 2 SEL 351 5 6 7 Relay Instruction Manual Date Code 20070117 Setting the Relay Overview Using the ACSELERATOR QuickSet SEL 5030 Software to make settings changes handles these details automatically ...

Page 359: ...Via the Front Panel The relay front panel SET pushbutton provides access to the Relay Global and Port settings only Thus the corresponding Relay Global and Port settings sheets that follow in this section can also be used when making these settings via the front panel Refer to Figure 11 3 for information on front panel communications ...

Page 360: ...for b contact opens for an a see Figure 7 27 and the EN LED extinguishes see Table 5 1 while the relay is disabled The relay is disabled for about one second If Logic settings are changed for the active group the relay can be disabled for up to 15 seconds If changes are made to the Relay or Logic settings for a setting group other than the active setting group see Table 9 1 the relay is not disabl...

Page 361: ...ied multiples of pickup current for operating time Tp M 1 for reset time TR M 1 Table 9 3 Equations Associated With U S Curves Curve Type Operating Time Reset Time Figure U1 Moderately Inverse Figure 9 1 U2 Inverse Figure 9 2 U3 Very Inverse Figure 9 3 U4 Extremely Inverse Figure 9 4 U5 Short Time Inverse Figure 9 5 Table 9 4 Equations Associated With IEC Curves Sheet 1 of 2 Curve Type Operating T...

Page 362: ...g the Relay Time Overcurrent Curves C4 Long Time Inverse Figure 9 9 C5 Short Time Inverse Figure 9 10 Table 9 4 Equations Associated With IEC Curves Sheet 2 of 2 Curve Type Operating Time Reset Time Figure Tp TD 120 M 1 TR TD 120 1 M Tp TD 0 05 M 0 04 1 TR TD 4 85 1 M 2 ...

Page 363: ... 6 00 5 00 4 00 3 00 2 00 1 00 15 00 12 00 10 00 8 00 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 364: ... 5 00 4 00 3 00 2 00 1 00 15 00 12 00 10 00 8 00 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 365: ... 00 0 50 10 00 8 00 6 00 5 00 4 00 3 00 2 00 15 00 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 366: ... 2 00 1 00 0 50 15 00 12 00 10 00 8 00 6 00 5 00 4 00 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 367: ...0 1 00 2 00 6 00 3 00 4 00 5 00 10 00 8 00 12 00 15 00 01 5 6 7 8 1 9 02 03 04 05 06 07 1 08 09 2 3 4 5 6 1 7 8 9 2 3 4 5 6 7 8 10 9 20 30 50 40 60 100 90 70 80 80 9 2 3 4 5 6 7 8 10 20 30 40 50 60 70 90 100 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 60 50 30 25 150 125 300 250 1500 1250 600 500 3000 2500 6000 5000 ...

Page 368: ...1 0 60 0 05 0 50 0 40 0 30 0 20 0 10 1 00 0 90 0 80 0 70 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 369: ...0 30 0 20 0 10 0 05 1 00 0 90 0 80 0 70 0 60 0 50 0 40 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 370: ...C3 01 5 6 7 8 9 1 02 03 04 05 09 07 06 08 1 2 3 4 5 7 6 9 8 1 4 2 3 5 6 7 8 9 10 40 20 30 70 50 60 80 90 100 80 10 2 3 6 4 5 7 9 8 20 50 30 40 60 70 100 90 0 20 0 10 0 05 1 00 0 90 0 80 0 70 0 60 0 50 0 40 0 30 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 3 2 5 6 5 15 12 5 30 25 60 50 600 500 150 125 300 250 1500 1250 3000 2500 6000 5000 ...

Page 371: ...1 00 0 90 0 80 0 70 0 60 0 50 0 40 0 30 7 6 5 1 9 8 1 4 2 3 5 6 8 7 9 1 2 3 4 5 7 6 4 2 3 7 6 5 10 9 8 40 20 30 70 50 60 80 90 100 50 9 8 10 20 30 40 300 200 100 80 60 70 90 1000 900 800 700 600 500 400 Time in Seconds Multiples of Pickup Time in Cycles 60 Hz 50Hz 30 25 60 50 150 125 300 250 3000 2500 600 500 1500 1250 6000 5000 15000 12500 30000 25000 60000 50000 ...

Page 372: ...0 20 30 40 50 60 70 80 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 50 Hz 6000 5000 3000 2500 1500 1250 600 500 300 250 150 125 60 50 30 25 15 12 5 6 5 3 2 5 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 ...

Page 373: ...BC4 50CA4 5 50A 50B 50C 51A 51AT 51AR 51B 51BT 6 51BR 51C 51CT 51CR 51P 51PT 51PR 51N 7 51NT 51NR 51G 51GT 51GR 51Q 51QT 51QR 8 50P1 50P2 50P3 50P4 50N1 50N2 50N3 50N4 9 67P1 67P2 67P3 67P4 67N1 67N2 67N3 67N4 10 67P1T 67P2T 67P3T 67P4T 67N1T 67N2T 67N3T 67N4T 11 50G1 50G2 50G3 50G4 50Q1 50Q2 50Q3 50Q4 12 67G1 67G2 67G3 67G4 67Q1 67Q2 67Q3 67Q4 13 67G1T 67G2T 67G3T 67G4T 67Q1T 67Q2T 67Q3T 67Q4T 14...

Page 374: ... INT3Pf 55 PWRA3 PWRB3 PWRC3 PWRA4 PWRB4 PWRC4 INTA INTB 56 SAGA SAGB SAGC SAG3P SWA SWB SWC SW3P 57 SAGAB SAGBC SAGCA SWAB SWBC SWCA TSOK TIRIG 58 3PWR1 3PWR2 3PWR3 3PWR4 INTAB INTBC INTCA DELTA 59 27AB2 27BC2 27CA2 59AB2 59BC2 59CA2 59Q2 3V0 60 V1GOOD b b V0GAIN INMET ICMET IBMET IAMET 61 GNDSWg 50NFg 50NRg 32NEg F32Ng R32Ng 32NF 32NR 62 PMDOK F32Wg R32Wg F32Cg R32Cg NSAg NSBg NSCg a See Figure ...

Page 375: ...ase instantaneous overcurrent element C phase current above pickup setting 50P4P see Figure 3 1 50AB1 Level 1 AB phase to phase instantaneous overcurrent element AB phase to phase current above pickup setting 50PP1P see Figure 3 7 50BC1 Level 1 BC phase to phase instantaneous overcurrent element BC phase to phase current above pickup setting 50PP1P see Figure 3 7 50CA1 Level 1 CA phase to phase in...

Page 376: ...hase current above pickup setting 51PP for phase time overcurrent element 51PT see Figure 3 14 Testing Control 51PT Phase time overcurrent element 51PT timed out see Figure 3 14 Tripping 51PR Phase time overcurrent element 51PT reset see Figure 3 14 Testing 51N Neutral ground current channel IN above pickup setting 51NP for neutral ground time overcurrent element 51NT see Figure 3 18 Testing Contr...

Page 377: ...rived from 50P3 see Figure 3 3 67P4 Level 4 phase instantaneous overcurrent element derived from 50P4 see Figure 3 3 67N1 Level 1 neutral ground instantaneous overcurrent element derived from 50N1 see Figure 3 8 67N2 Level 2 neutral ground instantaneous overcurrent element derived from 50N2 see Figure 3 8 67N3 Level 3 neutral ground instantaneous overcurrent element derived from 50N3 see Figure 3 ...

Page 378: ...3 10 67G3 Level 3 residual ground instantaneous overcurrent element derived from 50G3 see Figure 3 10 67G4 Level 4 residual ground instantaneous overcurrent element derived from 50G4 see Figure 3 10 67Q1a Level 1 negative sequence instantaneous overcurrent element derived from 50Q1 see Figure 3 12 Testing Control 67Q2a Level 2 negative sequence instantaneous overcurrent element derived from 50Q2 s...

Page 379: ... Figure 4 19 50GF Forward direction residual ground overcurrent threshold exceeded see Figure 4 4 and Figure 4 7 50GR Reverse direction residual ground overcurrent threshold exceeded see Figure 4 4 and Figure 4 7 32VE Internal enable for zero sequence voltage polarized directional element see Figure 4 4 and Figure 4 7 32QGE Internal enable for negative sequence voltage polarized directional elemen...

Page 380: ...dervoltage element A phase voltage below pickup setting 27P2P see Figure 3 21 27B2 B phase instantaneous undervoltage element B phase voltage below pickup setting 27P2P see Figure 3 21 27C2 C phase instantaneous undervoltage element C phase voltage below pickup setting 27P2P see Figure 3 21 59A1 A phase instantaneous overvoltage element A phase voltage above pickup setting 59P1P see Figure 3 21 59...

Page 381: ...ected phase voltage VP between threshold settings 25VLO and 25VHI see Figure 3 26 Testing 59VS Channel VS voltage window element channel VS voltage between threshold settings 25VLO and 25VHI see Figure 3 26 SF Slip frequency between voltages VP and VS less than setting 25SF see Figure 3 26 25A1 Synchronism check element see Figure 3 27 Control 25A2 Synchronism check element see Figure 3 27 3P27 27...

Page 382: ...106 Optoisolated input IN106 asserted see Figure 7 1 Circuit breaker status Control via optoisolated inputs IN105 Optoisolated input IN105 asserted see Figure 7 1 IN104 Optoisolated input IN104 asserted see Figure 7 1 IN103 Optoisolated input IN103 asserted see Figure 7 1 IN102 Optoisolated input IN102 asserted see Figure 7 1 IN101 Optoisolated input IN101 asserted see Figure 7 1 25 LB1 Local Bit ...

Page 383: ...sserted see Figure 7 10 RB15 Remote Bit 15 asserted see Figure 7 10 RB16 Remote Bit 16 asserted see Figure 7 10 29 LT1 Latch Bit 1 asserted see Figure 7 12 Control replacing traditional latching relays LT2 Latch Bit 2 asserted see Figure 7 12 LT3 Latch Bit 3 asserted see Figure 7 12 LT4 Latch Bit 4 asserted see Figure 7 12 LT5 Latch Bit 5 asserted see Figure 7 12 LT6 Latch Bit 6 asserted see Figur...

Page 384: ...le timer input SV7 asserted see Figure 7 25 SV8 SELOGIC control equation variable timer input SV8 asserted see Figure 7 25 SV5T SELOGIC control equation variable timer output SV5T asserted see Figure 7 24 Control SV6T SELOGIC control equation variable timer output SV6T asserted see Figure 7 24 SV7T SELOGIC control equation variable timer output SV7T asserted see Figure 7 25 SV8T SELOGIC control eq...

Page 385: ...State see Figure 6 5 and Table 6 1 79LO Reclosing relay in the Lockout State see Figure 6 5 and Table 6 1 SH0 Reclosing relay shot counter 0 see Table 6 3 SH1 Reclosing relay shot counter 1 see Table 6 3 SH2 Reclosing relay shot counter 2 see Table 6 3 SH3 Reclosing relay shot counter 3 see Table 6 3 SH4 Reclosing relay shot counter 4 see Table 6 3 36 CLOSE Close logic output asserted see Figure 6...

Page 386: ...g group 6 active see Table 7 3 ZLOUT Load encroachment load out element see Figure 4 2 Special phase overcurrent element control ZLIN Load encroachment load in element see Figure 4 2 39 ZLOAD ZLOUT ZLIN see Figure 4 2 BCWA A phase breaker contact wear has reached 100 wear level see Breaker Monitor on page 8 2 Indication BCWB B phase breaker contact wear has reached 100 wear level see Breaker Monit...

Page 387: ...n see the Note following Figure 5 2 and the Note in the Lockout State discussion following Table 6 1 Testing CCc Asserts 1 4 cycle for CLOSE command execution see the Note in the Set Close discussion following Figure 6 1 DCHI Station dc battery instantaneous overvoltage element see Figure 8 9 Indication DCLO Station dc battery instantaneous undervoltage element see Figure 8 9 44 67P2S Level 2 dire...

Page 388: ... asserted see Figure 7 28 b b b b 47 IN208 Optoisolated input IN208 asserted see Figure 7 2 Circuit breaker status Control via optoisolated inputs IN207 Optoisolated input IN208 asserted see Figure 7 2 IN206 Optoisolated input IN206 asserted see Figure 7 2 IN205 Optoisolated input IN205 asserted see Figure 7 2 IN204 Optoisolated input IN204 asserted see Figure 7 2 IN203 Optoisolated input IN203 as...

Page 389: ...B Channel B transmit bit 4 TMB3B Channel B transmit bit 3 TMB2B Channel B transmit bit 2 TMB1B Channel B transmit bit 1 53 LBOKB Channel B looped back ok see Appendix I CBADB Channel B channel unavailability over threshold RBADB Channel B outage duration over threshold ROKB Channel B received data ok LBOKA Channel A looped back ok CBADA Channel A channel unavailability over threshold RBADA Channel...

Page 390: ...well Int Reporting only operable in Firmware Version 7 SAGBC Phase to phase BC voltage sag element SAGCA Phase to phase CA voltage sag element SWAB Phase to phase AB voltage swell element see Figure 3 33 SWBC Phase to phase BC voltage swell element SWCA Phase to phase CA voltage swell element TSOK Time synchronization OK see Synchrophasor Relay Word Bits on page L 11 Synchrophasors TIRIG Relay tim...

Page 391: ...e element CA phase to phase voltage above pickup setting 59PP2P see Figure 3 23 59Q2 Negative sequence instantaneous overvoltage element negative sequence voltage above pickup setting 59Q2P see Figure 3 24 3V0 3V0 configuration element asserts when global setting VSCONN 3V0 see Figure 9 11 Indication 60 V1GOOD Positive sequence overvoltage element positive sequence voltage greater than setting VNO...

Page 392: ... Word Bits on page L 11 Synchrophasors F32W Forward directional output for Petersen Coil Wattmetric element an input to F32N logic Control Indication R32W Reverse directional output for Petersen Coil Wattmetric element an input to R32N logic F32C Forward directional element for Petersen Coil Incremental Conductance Element R32C Reverse directional element for Petersen Coil Incremental Conductance ...

Page 393: ...reaker and substation RID and TID settings may include the following characters 0 9 A Z space These two settings cannot be made via the front panel interface Current Transformer Ratios Refer to Current and Potential Transformer Ratios See Settings Explanations on page 9 37 on page SET 1 Phase and neutral current transformer ratios are set independently If neutral channel IN is connected residually...

Page 394: ... Maximum Fault Current With an 80 A Instantaneous Setting Maximum fault current in terms of primary CT and ANSI voltage rating burden in ohms and X R ratio is Equation 9 2 Equation 9 2 is an actual value equation derived from Equation 9 1 An SEL 351 phase instantaneous overcurrent element is to be set at 80 amps The relay will be used with a C400 400 5 current transformer with a 0 50 Ω ohm total b...

Page 395: ... Configuration SEL 351 5 6 7 relays with firmware version R308 or lower can only accept wye connected PTs to the voltage inputs and can only use voltage input VS as a synchronism check voltage auxiliary voltage input Beginning with firmware revision R309 these relays have two new global settings PTCONN and VSCONN and group setting VNOM accepts a value of OFF Refer to Voltage Input Configuration Se...

Page 396: ... SELOGIC control equations Relay Word bit 3V0 operates as shown in Figure 9 11 Refer to Current and Potential Transformer Ratios See Settings Explanations on page 9 37 on page SET 1 VNOM 67 00 V secondary when PTCONN WYE or 116 05 V secondary when PTCONN DELTA is the factory default value See Potential Transformer Ratios and PT Nominal Secondary Voltage Settings on page 9 42 for details on using V...

Page 397: ...ements Available in Firmware Version 7 on page 3 56 Uses a three phase power formula without 3V0 b Uses a three phase power for mula including VS PTRS PTR as 3V0 c Three phase power metering MW3P MVAR3P etc Uses a three phase power formula without 3V0 primary value b Uses a three phase power formula including VS as 3V0 pri mary value Quantity 3V0 in Metering Fast Meter Load Profile Recorder LDP an...

Page 398: ...00 250 step down instrumentation transformer in the circuit the correct PTRS setting is 60 1 6 96 00 Settings PTR and PTRS are used in event report and METER commands so that power system values can be reported in primary units Settings PTR and PTRS are also used when global setting VSCONN 3V0 to scale the measured VS voltage into the same voltage base as voltage inputs VA VB VC N for certain func...

Page 399: ... voltage connected to voltage input VA N as discussed in the top of Table 9 9 for the undervoltage block for frequency elements and demonstrated in Figure 2 23 Line Settings Refer to Line Settings See Settings Explanations on page 9 37 on page SET 1 Line impedance settings Z1MAG Z1ANG Z0MAG and Z0ANG are used in the fault locator see Fault Location on page 12 5 and in automatically making directio...

Page 400: ...tor Settings See Breaker Monitor on page 8 2 on page SET 26 The enable settings on Settings Sheet 2 E50P ESSI control the settings that follow through Sheet 17 Enable setting EBMON on Settings Sheet 25 controls the settings that immediately follow it This helps limit the number of settings that need to be made Each setting subgroup on Settings Sheets 2 through 17 has a reference back to the contro...

Page 401: ...ollow include the definition and input range for each setting in the relay Refer to Relay Element Pickup Ranges and Accuracies on page 1 15 for information on 5 A nominal and 1 A nominal ordering options and additional 0 2 A nominal and 0 05 A nominal options for neutral channel IN and how they influence overcurrent element setting ranges ...

Page 402: ...This page intentionally left blank ...

Page 403: ... on page 9 37 Phase IA IB IC Current Transformer Ratio 1 6000 CTR Neutral IN Current Transformer Ratio 1 10000 CTRN Phase VA VB VC wye connected or Phase to Phase VAB VBC VCA delta connected Potential Transformer Ratio 1 00 10000 00 PTR Synchronism Voltage VS Potential Transformer Ratio 1 00 10000 00 PTRS PT Nominal Voltage line to neutral wye connected or line to line delta connected OFF 12 50 15...

Page 404: ...0 90 00 degrees Z0SANG Line length 0 10 999 00 unitless LL Instantaneous Definite Time Overcurrent Enable Settings Phase element levels N 1 6 see Figure 3 1 Figure 3 2 Figure 3 3 and Figure 3 7 E50P Neutral ground element levels channel IN N 1 6 see Figure 3 8 and Figure 3 9 E50N Residual ground element levels N 1 6 see Figure 3 10 and Figure 3 11 E50G Negative sequence element levels N 1 6 see Fi...

Page 405: ...e Reclosing Relay on page 6 12 E79 SELOGIC Control Equation Variable Timers N 1 16 see Figure 7 24 and Figure 7 25 ESV Demand Metering THM Thermal ROL Rolling see Figure 8 11 EDEM Power element levels N 1 4 3P1 3P4 only available in Firmware Version 7 setting choices 1 4 only available when global setting PTCONN WYE EPWR Voltage Sag Swell Interruption Y N only available in Firmware Version 7 see F...

Page 406: ... nom 0 20 34 00 A 1 A nom 50PP2P Pickup OFF 1 00 170 00 A 5 A nom 0 20 34 00 A 1 A nom 50PP3P Pickup OFF 1 00 170 00 A 5 A nom 0 20 34 00 A 1 A nom 50PP4P Neutral Ground Inst Def Time Overcurrent Elements Channel IN See Figure 3 8 and Figure 3 9 Number of neutral ground element pickup settings dependent on preceding enable setting E50N 1 6 Pickup OFF 0 250 100 000 A 5 A nom 0 050 20 000 A 1 A nom ...

Page 407: ...0G3P Pickup OFF 0 050 100 000 A 5 A nom 0 010 20 000 A 1 A nom 50G4P Pickup OFF 0 050 100 000 A 5 A nom 0 010 20 000 A 1 A nom 50G5P Pickup OFF 0 050 100 000 A 5 A nom 0 010 20 000 A 1 A nom 50G6P 50G1P 50G6P setting step size 0 010 A 5 A nom 0 002 A 1 A nom Residual Ground Definite Time Overcurrent Elements See Figure 3 10 Number of residual ground element time delay settings dependent on precedi...

Page 408: ...0 00 16000 00 cycles in 0 25 cycle steps 67Q3D Time delay 0 00 16000 00 cycles in 0 25 cycle steps 67Q4D Phase Time Overcurrent Element See Figure 3 14 Make the following settings if preceding enable setting E51P 1 or 2 Pickup OFF 0 25 16 00 A 5 A nom 0 05 3 20 A 1 A nom 51PP Curve U1 U5 C1 C5 see Figure 9 1 Figure 9 10 51PC Time Dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 51PTD El...

Page 409: ... 0 160 A 0 05 A nom 51NP Curve U1 U5 C1 C5 see Figure 9 1 Figure 9 10 51NC Time Dial 0 50 15 00 for curves U1 U5 0 05 1 00 for curves C1 C5 51NTD Electromechanical Reset Y N 51NRS Residual Ground Time Overcurrent Element See Figure 3 19 Make the following settings if preceding enable setting E51G Y Pickup OFF 0 10 16 00 A 5 A nom 0 02 3 20 A 1 A nom 51GP Curve U1 U5 C1 C5 see Figure 9 1 Figure 9 1...

Page 410: ...tings on page 4 38 Make settings DIR1 DIR4 and ORDER if preceding enable setting E32 Y or AUTO Level 1 direction Forward Reverse None F R N DIR1 Level 2 direction Forward Reverse None F R N DIR2 Level 3 direction Forward Reverse None F R N DIR3 Level 4 direction Forward Reverse None F R N DIR4 Ground directional element priority combination of Q V I P S U or OFF ORDER If neutral channel IN is rate...

Page 411: ...p 0 25 5 00 A 5 A nom 0 05 1 00 A 1 A nom 50QRP Positive sequence current restraint factor I2 I1 0 02 0 50 unitless a2 Zero sequence current restraint factor I2 I0 0 10 1 20 unitless k2 Make settings 50GFP 50GRP and a0 if preceding enable setting E32 Y and preceding setting ORDER contains V or I If E32 AUTO and ORDER contains V or I these settings are made automatically Forward directional residua...

Page 412: ...nd ORDER contains P Wattmetric 3V0 Overvoltage Pickup 1 00 430 00 V secondary 59RES Forward Wattmetric Pickup 0 001 150 W secondary 32WFP Reverse Wattmetric Pickup 0 001 150 W secondary 32WRP Wattmetric Delay 30 00 999999 00 cycles 32WD Voltage Elements See Figure 3 21 Figure 3 22 Figure 3 23 Figure 3 24 and Figure 3 25 Make the following settings if preceding enable setting EVOLT Y and global set...

Page 413: ... 00 260 00 V secondary 150 V voltage inputs OFF 0 00 520 00 V secondary 300 V voltage inputs 59PP Make the following settings if preceding enable setting EVOLT Y and global setting PTCONN DELTA Negative sequence V2 overvoltage pickup OFF 0 00 60 00 V secondary 150 V voltage inputs OFF 0 00 120 00 V secondary 300 V voltage inputs 59QP Negative sequence V2 overvoltage pickup OFF 0 00 60 00 V seconda...

Page 414: ...ps degree option is for VS not in phase with VA VB or VC set with respect to VS constantly lagging VA Global setting PTCONN DELTA VAB VBC VCA or 0 to 330 in 30 steps degree option is for VS not in phase with VAB VBC or VCA set with respect to VS constantly lagging VAB SYNCP Breaker close time for angle compensation 0 00 60 00 cycles in 0 25 cycle steps TCLOSD Frequency Element See Figure 3 29 Figu...

Page 415: ... cycles in 0 25 cycle steps 79RSLD Reclose supervision time limit OFF 0 00 999999 00 cycles in 0 25 cycle steps set 79CLSD 0 00 for most applications see Figure 6 2 79CLSD Switch Onto Fault See Figure 5 3 Make the following settings if preceding enable setting ESOTF Y Close enable time delay OFF 0 00 16000 00 cycles in 0 25 cycle steps CLOEND 52A enable time delay OFF 0 00 16000 00 cycles in 0 25 ...

Page 416: ...s Z3XD Block trip receive extension 0 00 16000 00 cycles in 0 25 cycle steps BTXD Level 2 phase short delay 0 00 60 00 cycles in 0 25 cycle steps 67P2SD Level 2 neutral ground short delay 0 00 60 00 cycles in 0 25 cycle steps 67N2SD Level 2 residual ground short delay 0 00 60 00 cycles in 0 25 cycle steps 67G2SD Level 2 negative sequence short delay 0 00 60 00 cycles in 0 25 cycle steps 67Q2SD Dem...

Page 417: ...me 0 00 999999 00 cycles in 0 25 cycle steps SV2DO SV3 Pickup Time 0 00 999999 00 cycles in 0 25 cycle steps SV3PU SV3 Dropout Time 0 00 999999 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 99999...

Page 418: ...r of power element settings dependent on preceding enable setting EPWR 1 4 3P1 3P4 Make setting PWR1P if EPWR 1 4 Per Phase Power Element Pickup OFF 0 33 13000 00 VA secondary per phase 5 A nom OFF 0 07 2600 00 VA secondary per phase 1 A nom PWR1P Make setting 3PWR1P if EPWR 3P1 3P4 Three Phase Power Element Pickup OFF 1 00 39000 00 VA secondary three phase 5 A nom OFF 0 20 7800 00 VA secondary th...

Page 419: ...hree phase 5 A nom OFF 0 20 7800 00 VA secondary three phase 1 A nom 3PWR4P Pwr Ele Type WATTS WATTS VARS VARS PWR4T Pwr Ele Time Delay 0 00 16000 00 cyc PWR4D Voltage Sag Swell Interrupt Available in Firmware Version 7 see Figure 3 32 Figure 3 33 Figure 3 34 Make the following settings if preceding enable setting ESSI Y Percent Phase Interruption Pickup global setting PTCONN WYE or Percent Line t...

Page 420: ...Figure 5 1 Other trip conditions TR Communications assisted trip conditions TRCOMM Switch onto fault trip conditions TRSOTF Direct transfer trip conditions DTT Unlatch trip conditions ULTR Communications Assisted Trip Scheme Input Equations Permissive trip 1 used for ECOMM POTT DCUB1 or DCUB2 see Figure 5 5 Figure 5 7 and Figure 5 10 PT1 Loss of guard 1 used for ECOMM DCUB1 or DCUB2 see Figure 5 1...

Page 421: ...t Latch Bit LT3 SET3 Reset Latch Bit LT3 RST3 Set Latch Bit LT4 SET4 Reset Latch Bit LT4 RST4 Set Latch Bit LT5 SET5 Reset Latch Bit LT5 RST5 Set Latch Bit LT6 SET6 Reset latch Bit LT6 RST6 Set Latch Bit LT7 SET7 Reset Latch Bit LT7 RST7 Set Latch Bit LT8 SET8 Reset Latch Bit LT8 RST8 Set Latch Bit LT9 SET9 Reset Latch Bit LT9 RST9 Set Latch Bit LT10 SET10 Reset Latch Bit LT10 RST10 Set Latch Bit ...

Page 422: ...und see Figure 3 8 67N3TC Level 4 neutral ground see Figure 3 8 67N4TC Level 1 residual ground see Figure 3 10 67G1TC Level 2 residual ground see Figure 3 10 67G2TC Level 3 residual ground see Figure 3 10 67G3TC Level 4 residual ground see Figure 3 10 67G4TC Level 1 negative sequence see Figure 3 12 67Q1TC Level 2 negative sequence see Figure 3 12 67Q2TC Level 3 negative sequence see Figure 3 12 6...

Page 423: ...SELOGIC Control Equation Variable SV10 SV10 SELOGIC Control Equation Variable SV11 SV11 SELOGIC Control Equation Variable SV12 SV12 SELOGIC Control Equation Variable SV13 SV13 SELOGIC Control Equation Variable SV14 SV14 SELOGIC Control Equation Variable SV15 SV15 SELOGIC Control Equation Variable SV16 SV16 Output Contact Equations for Models 0351x0 0351x1 and 0351xY See Figure 7 27 Output Contact ...

Page 424: ...ee Rotating Default Display on page 7 36 and Rotat ing Default Display on page 11 12 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 DP...

Page 425: ...BKMON Enable for zero sequence voltage polarized sensitive neutral and channel IN current polarized directional elements see Figure 4 7 E32IV MIRRORED BITS Transmit Equations Available in Firmware Versions 6 and Greater see Appendix I Channel A transmit bit 1 TMB1A Channel A transmit bit 2 TMB2A Channel A transmit bit 3 TMB3A Channel A transmit bit 4 TMB4A Channel A transmit bit 5 TMB5A Channel A ...

Page 426: ...tential Transformer Connection DELTA WYE PTCONN VS Channel Input VS 3V0 VSCONN Settings Group Change Delay See Multiple Setting Groups on page 7 19 Group change delay 0 00 16000 00 cycles in 0 25 cycle steps TGR Power System Configuration and Date Format See Settings Explanations on page 9 37 Nominal frequency 50 Hz 60 Hz NFREQ Phase rotation ABC ACB PHROT Date format MDY YMD DATE_F Front Panel Di...

Page 427: ...ycle steps IN104D Input IN105 debounce time AC 0 00 1 00 cycles in 0 25 cycle steps IN105D Input IN106 debounce time AC 0 00 1 00 cycles in 0 25 cycle steps IN106D Optoisolated Input Timers for Models 0351x1 and 0351xY Extra I O Board See Figure 7 2 Input IN201 debounce time AC 0 00 1 00 cycles in 0 25 cycle steps IN201D Input IN202 debounce time AC 0 00 1 00 cycles in 0 25 cycle steps IN202D Inpu...

Page 428: ...99 00 kA primary in 0 01 kA steps KASP3 Notes COSP1 must be set greater than COSP2 COSP2 must be set greater than or equal to COSP3 KASP1 must be set less than KASP2 If COSP2 is set the same as COSP3 then KASP2 must be set the same as KASP3 KASP3 must be set at least 5 times but no more than 100 times the KASP1 setting value Synchronized Phasor Settings see Appendix L SEL Synchrophasors Synchroniz...

Page 429: ...tudes VA VB VC Phase voltage magnitudes wye connected only VAB VBC VCA Phase to phase voltage magnitudes VS Sync or broken delta voltage magnitude IG I1 3I2 V1 V2 Sequence current and voltage magnitudes 3V0 Zero sequence voltage magnitude wye connected only VDC Battery voltage FREQ Phase frequency MWA MWB MWC Phase megawatts wye connected only MW3 Three phase megawatts MVARA MVARB MVARC Phase mega...

Page 430: ...ye connected only MWH3I Three phase megaWATT hours in MWHAO MWHBO MWHCO Phase megaWATT hours out wye connected only MWH3O Three phase megaWATT hours out MVRHAI MVRHBI MVRHCI Phase megaVAR hours in wye connected only MVRH3I Three phase megaVAR hours in MVRHAO MVRHBO MVRHCO Phase megaVAR hours out wye connected only MVRH3O Three phase megaVAR hours out Label Quantity Recorded ...

Page 431: ...ters PLB2 Local Bit LB3 Name 14 characters NLB3 Clear Local Bit LB3 Label 7 characters CLB3 Set Local Bit LB3 Label 7 characters SLB3 Pulse Local Bit LB3 Label 7 characters PLB3 Local Bit LB4 Name 14 characters NLB4 Clear Local Bit LB4 Label 7 characters CLB4 Set Local Bit LB4 Label 7 characters SLB4 Pulse Local Bit LB4 Label 7 characters PLB4 Local Bit LB5 Name 14 characters NLB5 Clear Local Bit ...

Page 432: ...11 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 characters CLB13...

Page 433: ...ers DP4_1 Display if DP4 logical 0 16 characters DP4_0 Display if DP5 logical 1 16 characters DP5_1 Display if DP5 logical 0 16 characters DP5_0 Display if DP6 logical 1 16 characters DP6_1 Display if DP6 logical 0 16 characters DP6_0 Display if DP7 logical 1 16 characters DP7_1 Display if DP7 logical 0 16 characters DP7_0 Display if DP8 logical 1 16 characters DP8_1 Display if DP8 logical 0 16 ch...

Page 434: ...ers DP14_0 Display if DP15 logical 1 16 characters DP15_1 Display if DP15 logical 0 16 characters DP15_0 Display if DP16 logical 1 16 characters DP16_1 Display if DP16 logical 0 16 characters DP16_0 Reclosing Relay Labels See Functions Unique to the Front Panel Interface on page 11 6 Reclosing Relay Last Shot Label 14 char 79LL Reclosing Relay Shot Counter Label 14 char 79SL ...

Page 435: ...T_OUT Send Auto Messages to Port Y N DTA 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 AUTO Y to allow automatic messages at the serial port Set AUTO DTA to use the serial port with an SEL DTA2 Display Transducer Adapter Set...

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Page 437: ...ion programs on your personal computer to communicate with the relay Examples of PC based terminal emulation programs include CROSSTALK Microsoft Windows Terminal and HyperTerminal ProComm Plus 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 th...

Page 438: ...G B time code can be input into the connector for SERIAL PORT 1 on these three models If demodulated IRIG B time code is input into this connector it should not be input into SERIAL PORT 2 and vice versa Relay Word Bit TIRIG TIRIG asserts when the relay time is based on an IRIG B time source In the event that the relay is not synchronized to a connected IRIG B time source TIRIG logical 0 the troub...

Page 439: ...gure 10 3 SEL 351 to Computer Cable C227A Figure 10 4 SEL 351 to Modem SEL 351 Relay 9 Pin Male D Subconnector 9 Pin Female D Subconnector 2 3 5 8 3 2 5 8 7 1 4 6 RXD TXD GND CTS TXD RXD GND CTS RTS DCD DTR DSR Pin Func Pin Func Pin Pin Cable SEL C234A DTE Device DTE Data Terminal Equipment Computer Terminal Printer etc SEL 351 Relay 9 Pin Male D Subconnector 25 Pin Female D Subconnector 5 3 2 9 8...

Page 440: ...IG B IRIG B Time Code Input GND Ground SHIELD Shielded Ground RTS Request To Send SEL PRTU 9 Pin Male Round Conxall 9 Pin Male D Subconnector 1 2 4 5 7 9 5 2 3 7 8 9 GND TXD RXD CTS 12 GND GND RXD TXD RTS CTS GND Pin Func Pin Func Pin Pin Cable SEL C231 SEL 351 Relay 9 Pin Male D Subconnector 9 Pin Male D Subconnector 2 3 4 5 6 7 8 3 2 4 5 6 8 7 RXD TXD IRIG GND IRIG RTS CTS TXD RXD IRIG GND IRIG ...

Page 441: ...ications up to 500 meters and for electrical isolation of communications ports use the SEL 2800 family of Fiber Optic Transceivers Contact SEL for more details on these devices CTS Clear To Send DCD Data Carrier Detect DTR Data Terminal Ready DSR Data Set Ready Table 10 4 Serial Communications Port Pin Terminal Function Definitions Sheet 2 of 2 Pin Function Definition ...

Page 442: ...e with the SEL DTA2 Display Transducer Adapter See PORT Settings Serial Port Command SET P and Front Panel on page SET 33 To select SEL ASCII protocol set the port PROTO setting to SEL To select SEL Distributed Port Switch Protocol LMD set PROTO LMD To select DNP protocol set PROTO DNP SEL Fast Meter and SEL Compressed ASCII commands are active when PROTO is set to either SEL or LMD The commands a...

Page 443: ...ite the buffer Transmission should terminate at the end of the message in progress when XOFF is received and may resume when the relay sends XON 4 You can use the XON XOFF protocol to control the relay during data transmission When the relay receives XOFF during transmission it pauses until it receives an XON character If there is no message in progress when the relay receives XOFF it blocks trans...

Page 444: ...SEL Unsolicited Sequential Events Recorder provides SER events to an automated data collection system SEL Fast SER Protocol is available on any serial port The protocol is described in Appendix J SEL 351 Fast SER Protocol Distributed Network Protocol DNP3 The relay provides Distributed Network Protocol DNP3 slave support DNP is an optional protocol and is described in Appendix H Distributed Networ...

Page 445: ...ort Table 10 5 Serial Port Automatic Messages Condition Description Power Up The relay sends a message containing the present date and time Relay and Terminal Identifiers and the Access Level 0 prompt when the relay is turned on Event Trigger The relay sends an event summary each time an event report is triggered See Section 12 Standard Event Reports Sag Swell Interruption Report and SER Group Swi...

Page 446: ... command see Table 10 6 Enter the ACC command at the Access Level 0 prompt ACC Enter The ACC command takes the relay to Access Level 1 see ACC BAC and 2AC Commands go to Access Level 1 B or 2 on page 10 14 for more detail Access Level 1 When the relay is in Access Level 1 the relay sends the following prompt Commands BAC through TRI in Table 10 6 are available from Access Level 1 For example enter...

Page 447: ...are also available commands BAC through TRI in Table 10 6 The 2AC command allows the relay to go to Access Level 2 see ACC BAC and 2AC Commands go to Access Level 1 B or 2 on page 10 14 for more detail Enter the 2AC command at the Access Level B prompt 2AC Enter Access Level 2 When the relay is in Access Level 2 the relay sends the prompt Commands CON through VER in Table 10 6 are available from A...

Page 448: ... commands primarily allow the user to change relay settings Again a higher access level can access the serial port commands in a lower access level The commands are shown in uppercase letters but they can also be entered with lowercase letters Table 10 6 Serial Port Command Summary Sheet 1 of 2 Access Level Prompt Serial Port Command Command Description Corresponding Front Panel Pushbutton 0 ACC G...

Page 449: ...trol remote bit 2 COP Copy setting group 2 LOO Loopback 2 PAS Change passwords SET 2 SET Change settings SET 2 VER Show relay configuration and firmware version Table 10 6 Serial Port Command Summary Sheet 2 of 2 Access Level Prompt Serial Port Command Command Description Corresponding Front Panel Pushbutton Relay Response Definition FEEDER 1 This is the RID setting the relay is shipped with the d...

Page 450: ...2 6 for Password jumper information See PAS Command Change Passwords on page 10 40 for the list of default passwords and for more information on changing passwords Access Level Attempt Password Required Assume the following conditions Password jumper OFF not in place Access Level 0 At the Access Level 0 prompt enter the ACC command ACC Enter Because the Password jumper is not in place the relay as...

Page 451: ... the 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 BRE Command Breaker Monitor Data Use the BRE command to view the breaker monitor report BRE Enter FEEDER 1 Date 02 02 01 Time 08 40 14 802 STATION A Rly Tr...

Page 452: ... 114 2 835 Relay Disabled 2 02 14 01 13 18 09 236 02 14 01 13 18 09 736 0 499 Parity error 3 02 08 01 11 43 35 547 02 08 01 11 43 35 637 0 089 Underrun 4 02 05 01 17 18 12 993 02 05 01 17 18 13 115 0 121 Relay Disabled There may be up to 255 records in the extended report To limit the number of COMM records displayed in the report to the 10 most recent records type COMM 10 L Enter To select lines ...

Page 453: ...tive settings group number See GRO n Command Change Active Setting Group on page 10 36 and Multiple Setting Groups on page 7 19 for further details on settings groups HIS Command Event Summaries History HIS x displays event summaries or allows you to clear event summaries and corresponding event reports from nonvolatile memory If no parameters are specified with the HIS command HIS Enter the relay...

Page 454: ...ccessfully is listed in the LOCAT column If the fault locator is disabled enable setting EFLOC N the LOCAT column is left blank For either of these cases where the fault locator does not run the event type listed in the EVENT column is one of the following Relay Response Description AG for A phase to ground faults BG for B phase to ground faults CG for C phase to ground faults AB for A B phase to ...

Page 455: ...annot be read successfully the relay responds IRIG B DATA ERROR If an IRIG B signal is present the relay synchronizes its internal clock with IRIG B It is not necessary to issue the IRI command to synchronize the relay clock with IRIG B Use the IRI command to determine if the relay is properly reading the IRIG B signal LDP Command Load Profile Report Available in Firmware Versions 6 and 7 Use the ...

Page 456: ... wye connected voltage inputs is shown Currents IA B C N Input currents A primary IG Residual ground current A primary IG 3I0 IA IB IC Voltages VA B C S Wye connected voltage inputs kV primary VAB BC CA S Delta connected voltage inputs kV primary Power MWA B C Single phase megawatts wye connected voltage inputs only MW3P Three phase megawatts MVARA B C Single phase megavars wye connected voltage i...

Page 457: ...order Currents IA B C N Input currents A primary IG Residual ground current A primary IG 3I0 IA IB IC Voltages VA B C S Phase to neutral voltage inputs kV primary wye connected VAB BC CA S Phase to phase voltages kV primary delta connected VAB BC CA Calculated phase to phase voltages kV primary wye connected Vbase Demand average value based on V1 subject to the operating logic of the SSI Elements ...

Page 458: ... 14 761 14 636 14 880 15 235 V ANG DEG 0 00 119 95 120 94 29 93 AB BC CA Vbase V MAG KV 25 452 25 448 25 790 14 759 V ANG DEG 29 89 89 23 150 34 A B C 3P MW 0 447 0 535 0 435 1 417 MVAR 0 016 0 018 0 010 0 044 PF 0 999 0 999 1 000 1 000 LAG LAG LAG LAG I1 3I2 3I0 V1 V2 3V0 MAG 32 036 6 196 7 526 14 759 0 131 0 212 ANG DEG 1 47 106 38 117 52 0 33 59 08 157 40 FREQ Hz 60 00 VDC V 125 6 MET D Demand ...

Page 459: ...ommand Reset the peak demand values using the MET RP command For more information on demand metering see Demand Metering on page 8 20 MET E Energy Metering The MET E command displays the following quantities To view energy metering values enter the command MET E Enter The output from an SEL 351 with wye connected voltage inputs is shown 3I2 Negative sequence current A primary Power MWA B C Single ...

Page 460: ... 15 16 00 239 STATION A Max Date Time Min Date Time IA A 196 8 02 01 01 15 00 42 574 30 0 02 01 01 14 51 02 391 IB A 195 0 02 01 01 15 05 19 558 31 8 02 01 01 14 50 55 536 IC A 200 4 02 01 01 15 00 42 578 52 2 02 01 01 14 51 02 332 IN A 42 6 02 01 01 14 51 02 328 42 6 02 01 01 14 51 02 328 IG A 42 0 02 01 01 14 50 55 294 42 0 02 01 01 14 50 55 294 VA kV 11 7 02 01 01 15 01 01 576 3 4 02 01 01 15 0...

Page 461: ...l be truncated If the TSOK Relay Word bit is not set when at the specified trigger time the relay responds Aborted Relay word bit TSOK is not set When valid time parameters are entered the relay responds Synchronized Phasor Measurement Data Will be Displayed at hh mm ss 000 One MET PM time command may be pending on a single port at any one time If a MET PM time command is entered while another com...

Page 462: ... recorder SER and load profile settings and text label settings Below are the SHO command options You may append a setting name to each of the commands to specify the first setting to display e g SHO 1 E50P displays the setting Group 1 relay settings starting with setting E50P The default is the first setting The SHO commands display only the enabled settings To display all settings including disa...

Page 463: ...PC U3 51PTD 3 00 51PRS N 51GP 1 50 51GC U3 51GTD 1 50 51GRS N 79OI1 300 00 Press RETURN to continue 79RSD 1800 00 79RSLD 300 00 79CLSD 0 00 DMTC 5 PDEMP 5 00 NDEMP 1 500 GDEMP 1 50 QDEMP 1 50 TDURD 9 00 CFD 60 00 3POD 1 50 50LP 0 25 SV1PU 12 00 SV1DO 2 00 SHO L Enter SELogic group 1 SELogic Control Equations TR OC 51PT 51GT 81D1T LB3 50P1 SH0 TRCOMM 0 TRSOTF 0 DTT 0 ULTR 51P 51G PT1 0 LOG1 0 PT2 0...

Page 464: ...TURN to continue 67P4TC 1 67N1TC 1 67N2TC 1 67N3TC 1 67N4TC 1 67G1TC 1 67G2TC 1 67G3TC 1 67G4TC 1 67Q1TC 1 67Q2TC 1 67Q3TC 1 67Q4TC 1 51ATC 1 51BTC 1 51CTC 1 51PTC 1 51NTC 1 51GTC 1 51QTC 1 Press RETURN to continue SV1 TRIP SV2 0 SV3 0 SV4 0 SV5 0 SV6 0 SV7 0 SV8 0 SV9 0 SV10 0 SV11 0 SV12 0 SV13 0 SV14 0 SV15 0 SV16 0 OUT101 TRIP OUT102 CLOSE OUT103 SV1T OUT104 0 Press RETURN to continue OUT105 0...

Page 465: ...TMB1A 0 TMB2A 0 TMB3A 0 TMB4A 0 TMB5A 0 TMB6A 0 TMB7A 0 TMB8A 0 TMB1B 0 TMB2B 0 TMB3B 0 TMB4B 0 TMB5B 0 TMB6B 0 TMB7B 0 TMB8B 0 SHO G Enter Global Settings PTCONN WYE VSCONN VS TGR 0 00 NFREQ 60 PHROT ABC DATE_F MDY FP_TO 15 SCROLD 2 FPNGD IN LER 15 PRE 4 DCLOP OFF DCHIP OFF IN101D 0 50 IN102D 0 50 IN103D 0 50 IN104D 0 50 IN105D 0 50 IN106D 0 50 IN201D 0 50 IN202D 0 50 IN203D 0 50 IN204D 0 50 IN20...

Page 466: ...13 PLB13 NLB14 CLB14 SLB14 PLB14 NLB15 CLB15 SLB15 PLB15 NLB16 CLB16 SLB16 PLB16 DP1_1 79 ENABLED DP1_0 79 DISABLED Press RETURN to continue DP2_1 BREAKER CLOSED DP2_0 BREAKER OPEN 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 79LL SET RECLOSURES 79SL RECLOSE COUN...

Page 467: ... test statuses use the STA C command from Access Level 2 STA C Enter The relay responds Reboot the relay and clear status Are you sure Y N If you select N or n the relay displays Relay Response Description FID FID is the firmware identifier string It identifies the firmware revision CID CID is the firmware checksum identifier OS OS Offset displays measured dc offset voltages in millivolts for the ...

Page 468: ...equivalent TAR command via the front panel display does remap the bottom row of the front panel target LEDs see Figure 11 3 pushbutton OTHER The TAR command options are Command Description TAR n k or TAR ROW n k Shows Relay Word row number n 0 62 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 displa...

Page 469: ...81 0 1 1 0 0 0 0 1 0 Row A B C G N RS CY LO 1 1 1 1 0 0 0 0 1 Row 50A1 50B1 50C1 50A2 50B2 50C2 50A3 50B3 2 0 0 0 0 0 0 0 0 Row 50C3 50A4 50B4 50C4 50AB1 50BC1 50CA1 50AB2 3 0 0 0 0 0 0 0 0 Row 50BC2 50CA2 50AB3 50BC3 50CA3 50AB4 50BC4 50CA4 4 0 0 0 0 0 0 0 0 54 rows not shown Row 27AB2 27BC2 27CA2 59AB2 59BC2 59CA2 59Q2 3V0 59 0 0 0 0 0 0 0 1 Row V1GOOD V0GAIN INMET ICMET IBMET IAMET 60 0 0 0 1 1...

Page 470: ... a single port at any one time If a TRI time command is entered while another command is pending the old request will be cancelled and the new request will be pending TRI commands entered without the time parameter will not affect any pending TRI time commands A TRI STA command may be used to see if a TRI time command is pending The following shows the output from an SEL 351 5 6 7 Triggered If the...

Page 471: ...8 6 IC 27 6 kA Ext Trips 2 IA 0 8 IB 0 6 IC 0 7 kA Percent wear A 22 B 28 C 25 LAST RESET 11 12 00 09 25 14 The BRE W command only saves new settings after the Save Changes Y N message If a data entry error is made using the BRE W command the values echoed after the Invalid format changes not saved message are the previous BRE values unchanged by the aborted BRE W attempt BRE W Enter Breaker Wear ...

Page 472: ...breaker See Figure 6 1 See the Note in the Set Close discussion following Figure 6 1 for more information concerning Relay Word bit CC and its recommended use as used in the factory settings To issue the CLO command enter the following CLO Enter Close Breaker Y N Y Enter Are you sure Y N Y Enter Typing N Enter after either of the above prompts will abort the command The CLO command is supervised b...

Page 473: ...en Breaker The OPE OPEN command asserts Relay Word bit OC for 1 4 cycle when it is executed Relay Word bit OC can then be programmed into the TR SELOGIC control equation 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 Note following Figure 5 2 and the Note in the Lockout State discussion following Table 6 1 ...

Page 474: ... RB1 through RB16 see Rows 27 and 28 in Table 9 5 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 pulse Remote Bit 5 RB5 CON 5 Enter CONTROL RB5 PRB 5 E...

Page 475: ...hysically 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 are received The LOO command with just the channel specifier enables looped back mode on that channel for five minutes while t...

Page 476: ...formation While the password protection is disabled by setting the main board Password jumper in place Password jumper ON lost or forgotten passwords can be assigned a new password by using the PAS x command at Access Level 2 The relay will prompt for a new password and a confirmation of the new password If you wish to disable password protection for a specific access level even if the Password ju...

Page 477: ... change the relay settings see Table 9 1 VER Command Show Relay Configuration and Firmware Version The VER command provides relay configuration and information such as nominal current input ratings An example printout of the VER command follows Level 2 VER Enter Partnumber 035171H35B12X1 Mainboard 0311 Appearance Horizontal Conventional Data FLASH Size 1024 KBytes Analog Input Voltage PT 300 Vac W...

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Page 479: ...orded between dates d1 and d2 inclusive COM p m na Show COM report for MIRRORED BITS channel p using failure records m through n m 1 512 COM p na Show a COM report for MIRRORED BITS channel p using the latest n failure records n 1 512 where 1 is the most recent entry COM p Ca Clears communications records for MIRRORED BITS channel p or both channels if p is not specified COM C command COM La For a...

Page 480: ... format Enter k for repeat count MET X k Display same data as MET command with phase to phase voltages and Vbase Enter k for repeat count k 1 32767 if not specified default is 1 QUI Quit Returns to Access Level 0 Terminates SEL Distributed Port Switch Protocol LMD connection SER Show entire Sequential Events Recorder SER report SER d1 Show all rows in the SER report recorded on the specified date ...

Page 481: ...ct n where n is one of ALARM OUT101 OUT107 OUT201 OUT212 for k seconds Specify parameter n k 1 30 seconds if not specified default is 1 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 Relay Word bit RBn Remot...

Page 482: ...he relay VER Show relay configuration and firmware version a Available in firmware versions 6 and 7 Key Stroke Commands Ctrl Q Send XON command to restart communications port output previously halted by XOFF Ctrl S Send XOFF command to pause communications port output Ctrl X Send CANCEL command to abort current command and return to current access level prompt Key Stroke Commands When Using SET Co...

Page 483: ...SEL 351 5 6 7 Relay Section 11 R Instruction Manual Front Panel Interface Overview This section describes how to get information make settings and execute control operations from the relay front panel It also describes the default displays ...

Page 484: ...ime period see Global setting FP_TO in Front Panel Display Operation See Section 11 on page SET 24 relay shipped with FP_TO 15 minutes q See Figure 11 4 Figure 11 1 Front Panel Pushbuttons Overview Primary Functions Note in Figure 11 2 and Figure 11 3 that the front panel pushbutton primary functions correspond to serial port commands both retrieve the same information or perform the same function...

Page 485: ...efault passwords and for more information on changing passwords To enter the Access Level B and Access Level 2 passwords from the front panel if required use the Left Arrow and Right Arrow pushbuttons to underscore a password digit position Use the Up Arrow and Down Arrow pushbuttons to then change the digit Press the SELECT pushbutton once the correct Access Level B or Access Level 2 password is ...

Page 486: ...nd from the front panel t Local control is not available through the serial port and does not require the entry of a password Figure 11 3 Front Panel Pushbuttons Primary Functions continued Secondary Functions After a primary function is selected see Figure 11 2 and Figure 11 3 the pushbuttons then revert to operating on their secondary functions see Figure 11 4 Use the Left Arrow and Right Arrow ...

Page 487: ...tivated again see Figure 11 2 and Figure 11 3 Figure 11 4 Front Panel Pushbuttons Secondary Functions Provides Help Screen Information When Viewing or Changing Settings with Pushbutton SET SELECT CANCEL Select Displayed Option or Setting EXIT Exit Entirely and Return to Default Display Function Description The front panel display gives indication of the arrow button to use Displays symbols Cancel ...

Page 488: ...n selecting function 79 the following screen appears shown here with example settings or If the reclosing relay doesn t exist see Reclosing Relay on page 6 12 the following screen appears The corresponding text label settings shown with factory default settings are 79LL SET RECLOSURES Last Shot Label limited to 14 characters 79SL RECLOSE COUNT Shot Counter Label limited to 14 characters These text...

Page 489: ...elay goes to the reclose cycle state front panel CY LED illuminates The reclosing relay shot counter screen still appears as The first open interval e g 79OI1 30 times out the shot counter increments from 0 to 1 and the relay recloses the breaker The reclosing relay shot counter screen shows the incremented shot counter The relay trips the breaker open again The reclosing relay shot counter screen...

Page 490: ...an emulate the following switch types in Figure 11 5 through Figure 11 7 Figure 11 5 Local Control Switch Configured as an ON OFF Switch Figure 11 6 Local Control Switch Configured as an OFF MOMENTARY Switch Figure 11 7 Local Control Switch Configured as an ON OFF MOMENTARY Switch Local control switches are created by making corresponding switch position label settings These text label settings ar...

Page 491: ...witches see Figure 11 6 There are no more local control switches in the factory default settings Press the Right Arrow pushbutton and scroll to the Output Contact Testing function This front panel function provides the same function as the serial port PUL command see Figure 11 3 Operate Local Control With Factory Settings Press the Right Arrow pushbutton and scroll back to the first set local cont...

Page 492: ...eturns to the RETURN position The MANUAL CLOSE switch is an OFF MOMENTARY type switch like the MANUAL TRIP switch and operates similarly See Local Control Switches on page 7 6 for details on how local bit outputs LB3 and LB4 are set in SELOGIC control equation settings to respectively trip and close a circuit breaker Local Control State Retained When Relay De energized Local bit states are stored ...

Page 493: ...efault settings the reclose enable disable function is provided by optoisolated input IN102 with the following SELOGIC control equation drive to lockout setting 79DTL IN102 LB3 NOT IN102 LB3 Local bit LB3 is the output of the previously discussed local control switch configured as a manual trip switch The relay is driven to lockout for any manual trip via LB3 When input IN102 is energized IN102 lo...

Page 494: ...one local control switch is operational It is a reminder of how to access the local control function See the preceding discussion in this section and Local Control Switches on page 7 6 for more information on local control If display point labels e g 79 DISABLED and BREAKER OPEN are enabled for display they also enter into the display rotation Global setting SCROLD determines how long each message...

Page 495: ...ctively The display point example settings are DP1 IN102 optoisolated input IN102 DP2 52A breaker status see Figure 7 3 Optoisolated input IN102 is used as a recloser enable disable 52A is the circuit breaker status see Optoisolated Inputs on page 7 2 INST INST FAULT TYPE FAULT TYPE SERIAL SERIAL PORT F PORT F 9 9 1 1 A A B B C C TRIP TRIP EN EN 50 50 RS RS G G N N COMM COMM SOTF SOTF 79 79 CY CY ...

Page 496: ... FAULT TYPE FAULT TYPE SERIAL SERIAL PORT F PORT F 9 9 1 1 A A B B C C TRIP TRIP EN EN 50 50 RS RS G G N N COMM COMM SOTF SOTF 79 79 CY CY LO LO 51 51 81 81 Press CNTRL for Local Control 79 ENABLED BREAKER OPEN IA 50 IB 50 IC 50 IN 0 Display Points SELOGIC Control Equation Settings Example Display Point States Display Point Label Settings DP1 IN102 logical 0 DP1_1 79 ENABLED DP1_0 79 DISABLED DP2_...

Page 497: ...l Lock Control of Front Panel LCD The rotating default display can be locked on a single screen See Rotating Default Display on page 7 36 Access the scroll lock control with the OTHER pushbutton INST INST FAULT TYPE FAULT TYPE SERIAL SERIAL PORT F PORT F 9 9 1 1 A A B B C C TRIP TRIP EN EN 50 50 RS RS G G N N COMM COMM SOTF SOTF 79 79 CY CY LO LO 51 51 81 81 Press CNTRL for Local Control 79 ENABLE...

Page 498: ...sage will appear for one second followed by the active screen 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 E...

Page 499: ...erface Rotating Default Display FPNGD OFF Additional Rotating Default Display Example See Figure 5 17 and accompanying text in Section 5 Trip and Target Logic for an example of resetting a rotating default display with the TARGET RESET pushbutton IA 1 IB 1 IC 1 IG 1 IA 1 IB 1 IC 1 ...

Page 500: ...This page intentionally left blank ...

Page 501: ...an example standard 15 cycle event report The relay adds lines in the sequential events recorder SER report for a change of state of a programmable condition The SER lists date and time stamped lines of information each time a programmed condition changes state The relay stores the latest 512 lines of the SER report in nonvolatile memory If the report fills up newer rows overwrite the oldest rows ...

Page 502: ...rt when any of the following occur Relay Word bit TRIP asserts Programmable SELOGIC control equation setting ER asserts to logical 1 TRI Trigger Event Reports serial port command executed Output contacts OUT101 OUT107 Models 0351x0 0351x1 and 0351xY pulsed via the serial port or front panel PUL Pulse Output Contact command Relay Word Bit TRIP Refer to Figure 5 1 If Relay Word bit TRIP asserts to l...

Page 503: ...rocessing interval If the fault is not interrupted after the relay trips then the relay outputs a breaker failure trip with output contact OUT103 and another event report is generated ER OUT103 logical 1 for one processing interval As stated earlier the 51G pickup indicator is still asserted at the time of breaker failure trip but the rising edge operators allow each individual action to generate ...

Page 504: ...e Event Summary portion of the Example Standard 15 Cycle Event Report near the end of this section for more information on the cosine filter and bipolar peak detector see CT Saturation Protection on page 1 3 The relay includes the event summary in the standard event report The identifiers date and time information is at the top of the standard event report and the other information follows at the ...

Page 505: ...n the report the Targets field is blank See Front Panel Target LEDs on page 5 31 Currents The Currents A pri ABCNGQ field shows the currents present in the event report row containing the maximum phase current The listed currents are Phase A channel IA B channel IB C channel IC Neutral ground N channel IN Table 12 1 Event Types Event Type Description AG BG CG Single phase to ground faults Appends ...

Page 506: ...ER 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 event report Defaults to 16 samples per cycle unless overridden with the Sx parameter A Specifies that only the analog section of the event is displayed current voltage station battery frequency output contacts optoisolated inp...

Page 507: ...e time in units of microseconds from another row The trigger point shall have a DT value of 0000 because the trigger time corresponds to the time displayed in the event report header The DT value for rows preceding the trigger point is referenced to the following row so they increment backwards in time The DT value for rows following the trigger point is referenced to the previous row so they incr...

Page 508: ...3 0 0 23 1041 811 85 936 9 40 130 2 49 7 81 6 0 0 23 1046 476 497 1022 10 49 114 6 3 0 111 9 0 0 23 0000 5 165 759 956 10 32 80 6 50 6 130 7 0 0 23 1040 283 955 726 10 54 35 8 90 7 128 2 0 0 23 1043 580 982 424 9 22 16 5 121 5 103 6 0 0 23 1038 881 847 17 9 51 64 0 131 3 69 7 0 0 23 1043 Figure 12 2 Example Synchrophasor Level Precise Event Report 1 16 Cycle Resolution Compressed ASCII Event Repor...

Page 509: ...onding standard event reports from nonvolatile memory See Section 10 Serial Port Communications and Commands for more information on the HIS Event Summaries History command Standard Event Report Column Definitions Refer to the example event report in Figure 12 3 to view event report columns This example event report displays rows of information each 1 4 cycle and was retrieved with the EVE command...

Page 510: ... 125 60 00 45 1 158 161 3 3 0 0 13 2 13 0 8 0 125 60 00 45 181 102 93 14 14 14 8 7 4 7 6 13 7 125 60 00 45 1 159 161 3 3 0 1 13 3 13 0 8 1 125 60 00 45 2 181 100 94 14 14 14 8 7 3 7 7 13 7 125 60 01 45 2 159 160 3 3 0 2 13 3 12 9 8 2 125 60 01 45 181 99 95 14 14 14 8 7 2 7 8 13 6 125 60 01 45 3 160 159 3 3 0 3 13 4 12 9 8 2 125 60 01 45 VCA Power system phase to phase voltage VCA primary kV PTCONN...

Page 511: ...g values automatically have variable scaling Variable scaling for compressed data displays both currents less than 10 A and voltages less than 10 kV with three decimal places NOTE The event report does not show the output contacts or optoisolated inputs for the extra I O board on models 0351x1 and 0351xY See Table 1 1 and figures referenced therein for more information on all the available models ...

Page 512: ...oth 50B and 50C picked up c Both 50C and 50A picked up 3 50A 50B and 50C picked up 50 PP 50AB1 50AB2 50AB3 50AB4 50BC1 50BC2 A Phase to phase instantaneous overcurrent element 50AB1 50AB2 50AB3 or 50AB4 picked up 50BC3 50BC4 50CA1 50CA2 50CA3 50CA4 B Phase to phase instantaneous overcurrent element 50BC1 50BC2 50BC3 or 50BC4 picked up C Phase to phase instantaneous overcurrent element 50CA1 50CA2 ...

Page 513: ...67_3 picked up levels 1 and 2 not picked up 2 Level 2 instantaneous element 67_2 picked up level 1 not picked up 1 Level 1 instantaneous element 67_1 picked up DM PQ PDEM QDEM P Phase demand ammeter element PDEM picked up Q Negative sequence demand ammeter element QDEM picked up b Both PDEM and QDEM picked up DM NG NDEM GDEM N Neutral ground demand ammeter element NDEM picked up G Residual ground ...

Page 514: ...se to phase instantaneous overvoltage element 59BC picked up C CA phase to phase instantaneous overvoltage element 59CA picked up a 59AB and 59CA elements picked up b 59AB and 59BC elements picked up c 59BC and 59CA elements picked up 3 59AB 59BC and 59CA elements picked up 59 PP2 delta connected 59AB2 59BC2 59CA2 A AB phase to phase instantaneous overvoltage element 59AB2 picked up B BC phase to ...

Page 515: ...cked up 81 27B 27B81 Frequency logic instantaneous undervoltage element 27B81 picked up 81 12 81D1 81D2 1 Frequency element 81D1 picked up 2 Frequency element 81D2 picked up b Both 81D1 and 81D2 picked up 81 34 81D3 81D4 3 Frequency element 81D3 picked up 4 Frequency element 81D4 picked up b Both 81D3 and 81D4 picked up 81 56 81D5 81D6 5 Frequency element 81D5 picked up 6 Frequency element 81D6 pi...

Page 516: ...bit LB6 asserted b Both LB5 and LB6 asserted Lcl 78 LB7 LB8 7 Local bit LB7 asserted 8 Local bit LB8 asserted b Both LB7 and LB8 asserted Rem 12 RB1 RB2 1 Remote bit RB1 asserted 2 Remote bit RB2 asserted b Both RB1 and RB2 asserted Rem 34 RB3 RB4 3 Remote bit RB3 asserted 4 Remote bit RB4 asserted b Both RB3 and RB4 asserted Rem 56 RB5 RB6 5 Remote bit RB5 asserted 6 Remote bit RB6 asserted b Bot...

Page 517: ...SV11T SELOGIC Var 12 SV12 SV12T SELOGIC Var 13 SV13 SV13T SELOGIC Var 14 SV14 SV14T SELOGIC Var 15 SV15 SV15T SELOGIC Var 16 SV16 SV16T 3PO 3PO Three pole open condition 3PO asserted SOTF SOTFE Switch onto fault SOTF enable asserted PT PT Permissive trip signal to POTT logic PT asserted PTRX PTRX1 PTRX2 1 Permissive trip 1 signal from DCUB logic PTRX1 asserted 2 Permissive trip 2 signal from DCUB ...

Page 518: ...asserted b Both RMB3A and RMB4A asserted RMB A 56 RMB5A RMB6A 5 MIRRORED BITS channel A receive bit 5 RMB5A asserted 6 MIRRORED BITS channel A receive bit 6 RMB6A asserted b Both RMB5A and RMB6A asserted RMB A 78 RMB7A RMB8A 7 MIRRORED BITS channel A receive bit 7 RMB7A asserted 8 MIRRORED BITS channel A receive bit 8 RMB8A asserted b Both RMB7A and RMB8A asserted TMB B 12 TMB1B TMB2B 1 MIRRORED B...

Page 519: ...BADB asserted b Both CBADA and CBADB asserted LBOK LBOKA LBOKB A MIRRORED BITS channel A loop back ok LBOKA asserted B MIRRORED BITS channel A loop back ok LBOKB asserted b Both LBOKA and LBOKB asserted PWR A 12b PWRA1 PWRA2 1 Level 1 A phase power element PWR1A picked up 2 Level 2 A phase power element PWR2A picked up b Both PWR1A and PWR2A picked up PWR A 34b PWRA3 PWRA4 3 Level 3 A phase power ...

Page 520: ... up PWR 3P 34c 3PWR3 3PWR4 3 Level 3 3 phase power element 3PWR3 picked up 4 Level 4 3 phase power element 3PWR4 picked up b Both 3PWR3 and 3PWR4 picked up a Output contacts can be a or b type contacts see Table 2 2 and Figure 7 27 Figure 7 28 b Available in Firmware Version 7 when Global setting PTCONN WYE c Available in Firmware Version 7 Table 12 3 Output Input and Protection and Control Elemen...

Page 521: ...e relay time tags the change in the SER The other two SER factory settings SER2 and SER3 trigger rows in the SER event report for such things as optoisolated input IN101 output contact OUT101 OUT102 or OUT103 and lockout state 79LO The relay adds a message to the SER to indicate power up Relay newly powered up The relay adds a message to the SER to indicate a settings change has been made to activ...

Page 522: ...ing row number SER 17 If SER is entered with a single number following it 17 in this example the first 17 rows are displayed if they exist They display with the oldest row row 17 at the beginning top of the report and the latest row row 1 at the end bottom of the report Chronological progression through the report is down the page and in descending row number SER 10 33 If SER is entered with two n...

Page 523: ...red with two dates following it date 2 17 97 chronologically precedes date 3 23 97 in this example all the rows between and including dates 2 17 97 and 3 23 97 are displayed if they exist They display with the oldest row date 2 17 97 at the beginning top of the report and the latest row date 3 23 97 at the end bottom of the report Chronological progression through the report is down the page and i...

Page 524: ...Out In Currents Amps Pri Voltages kV Pri 1357 135 IA IB IC IN IG VA VB VC VS Vdc Freq 246A 246 1 241 26 268 1 1 9 6 1 5 11 1 0 0 24 60 01 b 169 293 124 0 0 7 2 11 9 4 7 0 0 24 60 01 b 242 26 267 1 1 9 6 1 5 11 0 0 0 24 60 01 b 168 294 124 1 2 7 2 11 9 4 7 0 0 24 60 01 b Two cycles of data not shown in this example 4 243 22 266 1 1 9 7 1 3 11 0 0 0 24 60 01 b 166 294 128 0 0 7 1 11 9 4 8 0 0 24 60 ...

Page 525: ... 1 1 0 2 9 8 1 2 10 9 0 0 24 60 01 2 0 0 0 1 0 7 0 11 9 5 0 0 0 24 60 01 2 0 0 0 0 0 9 8 1 1 10 9 0 0 24 60 01 2 0 1 1 1 1 7 0 11 9 5 0 0 0 24 60 01 2 Protection and Control Elements 51 50 32 67 Dm 27 59 25 81 TS Lcl Rem Ltch SELogic V 5 2 ih ZLV Variable P PN PN P P1 9S 7135 7mo lOd 13571357O1357 1111111 ABCPNGQPP QG PNGQ QG PPSPPQNS VFA B246 9et dPc 24682468C2468 1234567890123456 1 R 0 R 0 R 0 R...

Page 526: ...ATION A CTR 120 CTRN 120 PTR 180 00 PTRS 180 00 VNOM 67 00 Z1MAG 2 14 Z1ANG 68 86 Z0MAG 6 38 Z0ANG 72 47 LL 4 84 E50P 1 E50N N E50G N E50Q N E51P 1 E51N N E51G Y E51Q N E32 N ELOAD N ESOTF N EVOLT N E25 N EFLOC N ELOP Y ECOMM N E81 N E79 1 ESV 1 EDEM THM EPWR N ESSI N 50P1P 15 00 67P1D 0 00 50PP1P OFF 51PP 6 00 51PC U3 51PTD 3 00 51PRS N 51GP 1 50 51GC U3 51GTD 1 50 51GRS N 79OI1 300 00 79RSD 1800...

Page 527: ... RST11 0 SET12 0 RST12 0 SET13 0 RST13 0 SET14 0 RST14 0 SET15 0 RST15 0 SET16 0 RST16 0 67P1TC 1 67P2TC 1 67P3TC 1 67P4TC 1 67N1TC 1 67N2TC 1 67N3TC 1 67N4TC 1 67G1TC 1 67G2TC 1 67G3TC 1 67G4TC 1 67Q1TC 1 67Q2TC 1 67Q3TC 1 67Q4TC 1 51ATC 1 51BTC 1 51CTC 1 51PTC 1 51NTC 1 51GTC 1 51QTC 1 SV1 TRIP SV2 0 SV3 0 SV4 0 SV5 0 SV6 0 SV7 0 SV8 0 SV9 0 SV10 0 SV11 0 SV12 0 SV13 0 SV14 0 SV15 0 SV16 0 OUT10...

Page 528: ...nued from previous page OUT207 0 OUT208 0 OUT209 0 OUT210 0 OUT211 0 OUT212 0 DP1 IN102 DP2 52A 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 51P 51G OUT103 FAULT 51P 51G BSYNCH 52A CLMON 0 BKMON TRIP E32IV 1 TMB1A 0 TMB2A 0 TMB3A 0 TMB4A 0 TMB5A 0 TMB6A 0 TMB7A 0 TMB8A 0 TMB1B 0 TMB2B 0 TMB3B 0 TMB4B 0 TMB5B 0 TMB...

Page 529: ... PPV 9S 7135 7mo lOd 13571357O1357 1111111 ABCPNGQPP QG PNGQ QG P2SP21QS VFA B246 9et dPc 24682468C2468 1234567890123456 1 L 1 L 1 L 1 L 1 2 L 1 L 1 L 1 L 1 The Communication Elements Section is only in available in Firmware Versions 6 and 7 The PWR columns are only available in Firmware Version 7 Communication Elements S PZ EE ZDNS TMB RMB TMB RMB RRCL PWR 3O T3KKCWU 3SSTB A A B B OBBB 3P PT PRRE...

Page 530: ... Values From Sampled Current Waveform In Figure 12 5 note that any two rows of current data from the event report in Figure 12 3 1 4 cycle apart can be used to calculate rms current values Event Report Column 1474 2320 1479 2317 2317 1479 2320 1474 IA 1 2 2 2 Multiply by 1 Multiply by 2317 2320 1479 1474 2085 3281 2085 3277 t IA 1 4 cyc IApeak 3887 Apeak 3887 Apeak 2749 ARMS 1474 2 2320 2 2320 2 1...

Page 531: ...he event report in Figure 12 3 1 4 cycle apart can be used to calculate phasor rms current values In Figure 12 6 at the present sample the phasor rms current value is IA 2749 A 32 6 The present sample IA 2317 A is a real rms current value that relates to the phasor rms current value 2749 A cos 32 6 2317 A IA t IA 1474 2320 1479 2317 Event Report Column X Present Sample Magnitude X 2317 Y 1479 Angl...

Page 532: ...serted 3 04 12 99 09 28 31 816 IN101 Deasserted 2 04 12 99 09 28 31 879 OUT101 Deasserted 1 04 12 99 09 28 36 874 OUT102 Asserted Figure 12 7 Example Sequential Events Recorder SER Event Report The SER event report rows in Figure 12 7 are explained in the following text numbered in correspondence to the column The boxed numbered comments in Figure 12 3 also correspond to the column numbers in Figu...

Page 533: ...SH0 OUT101 TRIP 6 5 4 Instantaneous overcurrent element 50P1 and time overcurrent element pickups 51P and 51G drop out as the circuit breaker interrupts fault current 3 Input IN101 deasserts indicating that the circuit breaker opened 2 Trip output contact OUT101 deasserts after being asserted a minimum of 9 cycles Related settings TDURD 9 000 cycles Time difference 09 28 31 879 09 28 31 729 0 150 ...

Page 534: ... some time to store new SSI data in nonvolatile memory so if a system power outage also causes the relay power to fail there may not be an SSI record of the disturbance This is not a concern in substations where the relay is powered by a substation battery The relay triggers generates entries in the SSI report on the assertion of any sag swell or interruption relay element Relay Word bits SAGp SWp...

Page 535: ...ge variations but is locked when a disturbance occurs Table 12 4 SSI Element Status Columns Symbol Meaning for Each Column A B or C Global Setting PTCONN WYE Column A represents p A Column B represents p B Column C represents p C Global Setting PTCONN DELTA Column A represents pp AB Column B represents pp BC Column C represents pp CA No SSI bits asserted for phase p No SSI bits asserted for phases...

Page 536: ...at least four cycles SSI Recorder Operation Detailed Description From the SSI Recorder Ready state upon the initial assertion of one of the SSI Relay Word bits or a manual trigger condition the relay records SSI data in the following sequence Pre disturbance recording Record pre trigger entries at cycle intervals with the SSI Recorder status field displaying P Since no SSI elements are asserted co...

Page 537: ...he recorder to start over in fast mode with up to eight samples prior to the change An overflow condition can occur when the SSI recorder cannot keep up with the data generated during disturbances that create a large number of SSI entries The nonvolatile memory that is used for the SSI archive has a longer write time than the Random Access Memory RAM that is used to temporarily store the SSI data ...

Page 538: ...ression through the report is down the page and in descending row number SSI 47 22 If SSI 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 row 22 at the beginning top of the report and the oldest row row 47 at the end bottom of the report Reverse chronological prog...

Page 539: ...10 entries occur the oldest half of the SSI archive will be erased to make room for the new entries The most recent 3855 entries are always available Triggering the SSI Recorder Manually force the SSI Recorder to trigger using the SSI T command as shown in the following example SSI T Enter Triggered The SSI T command is only available if group setting ESSI Y in the active setting group If an SSI T...

Page 540: ... nom A B C G 5 Amp N 5 Amp Current I nom Voltage Vbase Vbase Ph ST Date Time Ia Ib Ic Ig In Va Vb Vc Vs kV ABC 36 11 22 00 08 47 24 272 11 13 15 3 0 100 99 100 0 14 94 R 35 12 05 00 16 21 12 635 20 23 28 7 0 98 98 98 0 15 29 P 34 12 05 00 16 21 12 639 20 22 29 8 0 98 98 98 0 15 29 P 33 12 05 00 16 21 12 644 20 22 28 7 0 98 98 98 0 15 29 P 32 12 05 00 16 21 12 648 20 23 28 7 0 98 98 98 0 15 29 P 31...

Page 541: ... SEL 351 7 R3xx V0 Zxxxxxx D2002xxxx CID xxxx I nom A B C G 5 Amp N 5 Amp Current I nom Voltage Vbase Vbase Ph ST Date Time Ia Ib Ic Ig In Vab Vbc Vca Vs kV ABC 36 11 22 00 08 47 24 272 11 13 15 3 0 100 99 100 0 25 88 R 35 12 05 00 16 21 12 635 20 23 28 7 0 98 98 98 0 26 48 P 34 12 05 00 16 21 12 639 20 22 29 8 0 98 98 98 0 26 48 P 33 12 05 00 16 21 12 644 20 22 28 7 0 98 98 98 0 26 48 P 32 12 05 ...

Page 542: ...7 For both wye and delta connected PT systems the SSI Report will capture disturbances caused by phase to phase and three phase faults subject to the actual settings in use and the fault characteristics For details on the ungrounded high impedance grounded and Petersen Coil directional elements see Directional Control for Neutral Ground and Residual Ground Overcurrent Elements on page 4 9 ...

Page 543: ... Testing and Troubleshooting Overview This section provides guidelines for determining and establishing test routines for the SEL 351 Relay Included are discussions on testing philosophies methods and tools Relay self tests and troubleshooting procedures are shown at the end of the section ...

Page 544: ...ished specifications It is important for you to perform acceptance testing on a relay if you are unfamiliar with its operating theory protection scheme logic or settings This helps ensure the accuracy and correctness of the relay settings when you issue them Commissioning Testing When When installing a new protection system Goals 1 Ensure that all system ac and dc connections are correct 2 Ensure ...

Page 545: ...in detail after each fault Using the event report current voltage and relay element data you can determine that the relay protection elements are operating properly Using the event report input and output data you can determine that the relay is asserting outputs at the correct instants and that auxiliary equipment is operating properly At the end of your maintenance interval the only items that n...

Page 546: ...the voltage input to the relay power supply terminals VDC Compare these quantities against other devices of known accuracy The METER command is avail able at the serial ports and front panel display See Section 10 Serial Port Communications and Commands and Section 11 Front Panel Interface EVENT Command The relay generates a 15 or 30 cycle event report in response to faults or disturbances Each re...

Page 547: ...re 13 1 Low Level Test Interface J1 or J10 Connector Scale factor calculation examples Using the Low Level Test Interface When Global Setting PTCONN DELTA When simulating a delta PT connection with the low level test interface referenced in Figure 13 1 apply the following signals The relay contains devices sensitive to Electrostatic Discharge ESD When working on the relay with the front panel remo...

Page 548: ...ments Testing With the Front Panel TAR Command Access the front panel TAR command from the front panel OTHER pushbutton menu To display the state of the 51PT element on the front panel display press the OTHER pushbutton cursor to the TAR option and press SELECT Press the Up Arrow pushbutton until TAR 6 is displayed on the top row of the LCD The bottom row of the LCD displays all elements asserted ...

Page 549: ...y in the Sequential Events Recorder SER for testing relay elements Use the SET R command to include the element s under test in any of the SER trigger lists SER1 through SER3 See Section 12 Standard Event Reports Sag Swell Interruption Report and SER To test the phase time overcurrent element 51PT with the SER make the following setting SER1 51P 51PT Element 51P asserts when phase current is above...

Page 550: ...eports at the serial port for warnings and failures The relay displays failure messages on the relay LCD display for failures Use the serial port STATUS command or front panel STATUS pushbutton to view relay self test status Table 13 3 Relay Self Tests Sheet 1 of 2 Self Test Condition Limits Protection Disabled ALARM Output Description IA IB IC IN VA VB VC VS Offset Warning 30 mV No Pulsed Measure...

Page 551: ... 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 351 main board Failures in these tests shut down the microprocessor and are not shown in the STATUS report Microprocessor Crystal Failure Yes Latched The relay monitors the microprocessor crystal If the crystal fail...

Page 552: ...ay should turn on the LCD back lighting Locate the contrast adjust potentiometer adjacent to the serial port con nector Use a small screwdriver to adjust the potentiometer Replace the relay front panel Relay Does Not Respond to Commands From Device Connected to Serial Port Ensure that the communications device is connected to the relay Verify relay or communications device baud rate setting and ot...

Page 553: ...20070117 Instruction Manual SEL 351 5 6 7 Relay Testing and Troubleshooting Relay Calibration Relay Calibration The SEL 351 is factory calibrated If you suspect that the relay is out of calibration contact the factory ...

Page 554: ...ory Assistance Factory Assistance We appreciate your interest in SEL products and services If you have questions or comments please contact us at Schweitzer Engineering Laboratories Inc 2350 NE Hopkins Court Pullman WA USA 99163 5603 Telephone 509 332 1890 Fax 509 332 7990 Internet www selinc com ...

Page 555: ... FID SEL 351 5 R303 V0 Z001001 D19990914 is firmware version number 5 firmware revision number 303 release date September 14 1999 Table A 1 lists the firmware versions a description of modifications and the instruction manual date code that corresponds to firmware versions The most recent firmware version is listed first x 5 Standard Features x 6 Standard Features plus MIRRORED BITS and Load Profi...

Page 556: ...tage elements Improved password security Removed indication of where maximum current is from raw event report Allowed Z1ANG and Z0ANG settings to be set as low as 5 degrees Power Factor values found in DNP and ASCII communication now match in resolution when polled simultaneously Improved the timing of the setting group Relay Word Bit SGn to update after a settings group change instead of during D...

Page 557: ...olarized ground direc tional elements and the Wattmetric and incremental conduc tance elements for Petersen Coil grounded systems to accept zero sequence 3V0 from either a calculated value as before or from a measurement on the VS voltage channel typically con nected to a broken delta zero sequence voltage source Added three phase power elements to the SEL 351 7 the exist ing single phase power el...

Page 558: ...stantaneous defi nite time overcurrent elements this delay is active for the new extended lower range only Updated loss of potential logic to allow a latched in LOP condi tion to stay asserted through a settings change or group change operation Corrected front panel breaker monitor reset function to return to the BRK_MON menu after selecting Yes or No Corrected an error in compressed event reports...

Page 559: ...g and deasserting when the relay is powered by ac Improved fault locator event type determination during short duration faults most likely seen during testing Added ac mode for optoisolated input debounce timers in global settings IN101D IN106D IN201D IN208D This allows ac control signals to be sensed on selected inputs Added metering quantities and breaker wear monitor data to dis play points Red...

Page 560: ...g on communica tion channels requiring an eight bit data format Expanded the setting range for the SYNCP synchronizing phase setting to accommodate compensation angle settings for synchronism check Changed DNP mapping command so that it now requests a con firmation before saving the map modification This firmware applies to the manual date code listed SEL 351 x R300 V0 D990621 Manual update only S...

Page 561: ... Table 9 5 Added new Relay Word bit definitions for PMDOK TSOK and TIRIG to Table 9 6 Setting Sheets Added Synchronized Phasor settings to Global settings Updated serial communications baud rate range for Port 1 Section 10 Added new Relay Word bit definitions TSOK and TIRIG to IRIG B section Added new SEL Fast Message Synchrophasor protocol to communications protocol list Added MET PM command expl...

Page 562: ...of Under and Overvoltage Elements on page 1 16 Section 3 Updated Figure 3 36 Section 4 Added information about loss of potential logic while 3PO is asserted Section 7 Updated LB4 setting under Factory Settings Examples Appendix G Removed COMMT and SOTFT from Table G 3 This manual differs from the previous versions as follows 20041210 Section 1 Updated subsection Time Overcurrent Elements on page 1...

Page 563: ...version R311 This manual differs from the previous versions as follows 20021106 These changes correct some figure reference and typographical errors and other clarifications Throughout man ual reformatted serial port command text in bold characters Section 1 Added CT Saturation Protection on page 1 3 information Corrected Output Contacts on page 1 13 specification Corrected metering accuracy speci...

Page 564: ...scription of accumulated energy metering value function Section 11 Corrected Figure 11 4 Reformatted subsections Functions Unique to the Front Panel Interface on page 11 6 and Rotating Default Display on page 11 12 Section 12 Corrected subsection Fault Location on page 12 5 to include settings Z0SMAG and Z0SANG Corrected subsection SER Triggering on page 12 21 to show separate messages for power u...

Page 565: ...ing VSCONN VS on page 2 14 Added subsection Broken Delta VS Connection Global Setting VSCONN 3V0 on page 2 14 Added subsection Polarity Check for VSCONN 3V0 on page 2 15 Added Figure 2 6 through Figure 2 9 Added Figure 2 21 through Figure 2 23 Section 3 Added Figure 3 23 and Figure 3 24 Updated subsection Voltage Input VS Connected Phase to Phase or Beyond Delta Wye Transformer Updated Table 3 10 ...

Page 566: ... Breaker Wear Monitor Quantities on the Rotating Default Dis play on page 7 46 Added subsection Extra Details for Displaying Time Overcurrent Elements on the Rotating Default Display on page 7 47 Section 8 Updated subsections Demand Metering on page 8 20 Energy Metering on page 8 29 Maximum Minimum Metering on page 8 30 and Load Profile Report Available in Firmware Versions 6 and 7 on page 8 33 Se...

Page 567: ...3 to include the addition of new Relay Word bits to the SEL 351 Appendix H Added Extended Mode DNP Operation and Settings Sheet Revised Table H 3 SEL 351 DNP Data Map to reflect addition of extended mode and delta PT configuration features This manual differs from the previous versions as follows 20020122 Appendix A Updated Firmware Version information This manual differs from the previous version...

Page 568: ... on fault type targeting A B C for Petersen Coil grounded and ungrounded high imped ance grounded systems Section 6 Added an additional condition for the reclosing relay going to the Lockout State new reclose initiation occurs during open interval timing this feature had always existed just not documented Section 9 Added the following Relay Word bits to Table 9 5 SSLOW SFAST V1GOOD V0GAIN INMET IC...

Page 569: ...ell and Interruption Elements Available in Firmware Version 7 on page 3 51 Section 5 Updated A B and C Target LEDs on page 5 33 Added SELOGIC Control Equation Setting FAULT on page 5 35 Section 7 Added ac setting description to Input Debounce Timers on page 7 3 Updated Note Make Latch Control Switch Settings With Care on page 7 16 Updated Note Make Active Setting Group Switching Settings with Care...

Page 570: ...ck element logic Expanded setting range for 27B81P in Table 3 10 Section 4 Corrected loss of potential positive sequence V1 reset threshold Section 5 Corrected Figure 5 6 Section 6 Corrected 79DTL factory default setting Table 6 4 Section 7 Added subsection Details on the Remote Control Switch MOMENTARY Position on page 7 11 Corrected the number of local latch and remote bits to 16 Section 8 Added...

Page 571: ...RGET RESET LAMP TEST Front Panel Pushbutton on page 5 34 to indicate that the targets cannot be reset when a TRIP condition is still present Section 7 Corrected Display Point examples Corrected subsection Relay Disabled Momentarily During Active Setting Group Change on page 7 20 Section 9 Corrected error in Relay Word bit description for 51G Table 9 6 Section 10 Added note to TAR R command descrip...

Page 572: ...ort protocol settings options for MIRRORED BITS protocol operating on communication channels requiring an eight bit data format MIRRORED BITS Transmit Equations Available in Firmware Versions 6 and Greater see Appendix I on page SET 23 Section 10 Added VER Command explanation at end of section Section 12 Added information explaining the need to make Sequential Events Recorder SER settings with car...

Page 573: ...emory A firmware loader program called SELBOOT resides in the relay To upgrade firmware use the SELBOOT program to download an SEL supplied file from a personal computer to the relay via any communications port This procedure is described in the following steps NOTE SEL strongly recommends that you upgrade firmware at the location of the relay and with a direct connection from the personal compute...

Page 574: ... these upgrade instructions If you do not have the latest SEL 5010 software please contact your customer service representative or the factory for details on getting the SEL 5010 Relay Assistant software Your relay instruction manual Upgrade Procedure A Prepare the Relay Step 1 If the relay is in use follow your company practices for removing a relay from service Typically these include changing s...

Page 575: ...communications ports b Choose a port and connect an SEL Cable C234A or equivalent serial communications cable to the personal computer serial port If there is no identification label connect the cable to any computer serial port Note that you might later change this computer serial port to a different port in order to establish communication between the relay and the computer Step 2 Disconnect any...

Page 576: ...e serial port communications parameters Figure B 3 that correspond to the relay settings you recorded in Step 9 on page B 2 If the computer settings do not match the relay settings change the computer settings to match the relay settings b Click OK Figure B 3 Determining Communications Parameters for the Computer Step 7 Set the terminal emulation to VT100 a From the File menu choose Properties b S...

Page 577: ...tion Startup Prompt Failure to Connect If you do not see the Access Level 0 prompt press Enter again If you still do not see the Access Level 0 prompt you have either selected the incorrect serial communications port on the computer or the computer speed setting does not match the data transmission rate of the relay Perform the following steps to reattempt a connection Step 9 From the Call menu ch...

Page 578: ...o match the settings you recorded in Step 9 on page B 2 and click OK twice to return to the terminal emulation window Figure B 7 Correcting the Communications Parameters Step 12 Press Enter In the terminal emulation window you should see the Access Level 0 prompt similar to that in Figure B 5 C Save Settings and Other Data Before upgrading firmware retrieve and record any History HIS Event EVE Met...

Page 579: ... type until you send the command to stop capturing text The terminal emulation program stores these data in the text file Step 4 Execute the Show Calibration SHO C command to retrieve the relay calibration settings Use the following Show commands to retrieve the relay settings SHO G SHO 1 SHO L 1 SHO 2 SHO L 2 SHO 3 SHO L 3 SHO 4 SHO L 4 SHO 5 SHO L 5 SHO 6 SHO L 6 SHO P 1 SHO P 2 SHO P 3 SHO P F ...

Page 580: ...problems when uploading firmware to the relay Step 2 From the computer start the SELBOOT program a From the Access Level 2 prompt type the following L_D Enter The relay responds with the following Disable relay to send or receive firmware Y N b Type Y Enter The relay responds with the following Are you sure Y N c Type Y Enter The relay responds with the following Relay Disabled Step 3 Wait for the...

Page 581: ...sen Send the relays firmware to a pc using xmodem hel Print this list FLASH Type 040 Checksum 370E OK Figure B 9 List of Commands Available in SELBOOT Establish a High Speed Connection Step 5 Type BAU 38400 Enter at the SELBOOT prompt Match Computer Communications Speed to the Relay Step 6 From the Call menu choose Disconnect to terminate communication Step 7 Correct the communications parameters ...

Page 582: ...p 4 Select 1K Xmodem if this protocol is available on the PC If the computer does not have 1K Xmodem choose Xmodem Step 5 Click Receive Figure B 11 Example Receive File Dialog Box Step 6 Enter a filename that clearly identifies the existing firmware version Figure B 12 using the version number from the FID you recorded earlier in Step 1 on page B 7 and click OK SEL lists the firmware revision numb...

Page 583: ...ssed files Verify that these uncompressed files have an s19 extension Step 2 Type REC Enter at the SELBOOT prompt to command the relay to receive new firmware REC Enter Caution This command erases the relays firmware If you erase the firmware new firmware must be loaded into the relay before it can be put back into service The relay asks whether you want to erase the existing firmware Are you sure...

Page 584: ...y on your PC to indicate a successful restart Figure B 14 Selecting New Firmware to Send to the Relay Figure B 15 Transferring New Firmware to the Relay Step 6 Press Enter and confirm that the Access Level 0 prompt appears on the computer screen Step 7 If you see the Access Level 0 prompt proceed to G Check Relay Self Tests on page B 13 NOTE Unsuccessful uploads can result from Xmodem time out a p...

Page 585: ... communications software settings to the values you recorded in A Prepare the Relay Step 3 From the Call menu choose Connect to rees tablish communication Step 4 Press Enter to check for the Access Level 0 prompt indicating that serial com munication is successful Step 5 If you get no response proceed to Match Computer Communications Speed to the Relay The restart was successful but the relay data...

Page 586: ...LED will illuminate Check for Access Level 0 prompt c Use the ACC and 2AC commands and type the corresponding passwords to reenter Access Level 2 d Enter the SHO n command to view relay settings and verify that these match the settings you saved see Backup Relay Settings on page B 7 Step 2 If the settings do not match reenter the settings you saved earlier a If you have SEL 5010 Relay Assistant so...

Page 587: ... check for the Access Level 0 prompt indicating that serial communication is successful Step 5 Use the ACC and 2AC commands and type the corresponding passwords to reenter Access Level 2 Step 6 Restore the original settings a If you have SEL 5010 Relay Assistant software or ACSELERATOR QuickSet restore the original settings by following the instructions for the respective software b If you do not ...

Page 588: ...he firmware identification string FID to verify download of the correct firmware a From the File menu choose Properties b Select the Settings tab in the Firmware Upgrade Properties dialog box Figure B 4 c Click ASCII Setup You should see a dialog box similar to Figure B 16 d Under ASCII Receiving select the check box to Append line feeds to incoming line ends Figure B 16 Preparing HyperTerminal fo...

Page 589: ...elay This step reestablishes automatic data collection between the SEL communications processor and the relay Failure to perform this step can result in automatic data collection failure when cycling communications processor power The relay is now ready for your commissioning procedure Ethernet Port Firmware Upgrade Instructions Introduction Perform the firmware upgrade process in the following se...

Page 590: ...13 SUBNETM 255 255 0 0 DEFRTR 10 201 0 1 ETELNET Y TPORTC 1024 EFTPSERV Y FTPUSER 2AC B Establish an FTP Connection The following instructions use Internet Explorer operating on Microsoft Windows XP as the FTP client to establish communication between the relay and a personal computer The instructions assume both devices are on the same side of any firewalls Step 1 Connect an Ethernet communicatio...

Page 591: ...ant to enter the user name and password using the following form Ensure there is no trailing forward slash Step 4 Enter the user name and the 2AC password when the window shown in Figure B 18 appears Step 5 Click the Log On button Figure B 18 Alternate Method of Establishing an FTP Connection Step 6 Right click on the file that you would like to copy Step 7 Click Copy to Folder Figure B 19 Step 8 ...

Page 592: ... Be Displayed Window C Transfer New Firmware Following the file transfer process Ethernet communications will be halted and the relay will reboot The relay will take up to a minute to reinitialize after rebooting Step 1 Right click on Start and click on Explore to launch Windows Explorer Step 2 Locate the folder containing the new firmware extension s19 Step 3 Click and drag the file to the Intern...

Page 593: ... 3 Type Telnet IP Address port at the prompt e g Telnet 10 201 0 213 1024 Step 4 Press Enter several times until you see the prompt E Verify Firmware Transfer To verify the firmware transfer completed properly perform the following steps after establishing a Telnet connection Step 1 Issue a STA command Step 2 Verify that the STA report does not include any warnings or failures Step 3 Verify that t...

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Page 595: ...on Manual SEL Distributed Port Switch Protocol SEL Distributed Port Switch Protocol LMD permits multiple SEL relays to share a common communications channel It is appropriate for low cost low speed port switching applications where updating a real time database is not a requirement ...

Page 596: ... reveal the following settings Settings Description PREFIX One character to precede the address This should be a character that does not occur in the course of other communications with the relay Valid choices are one of the following The default is ADDR Two character ASCII address The range is 01 to 99 The default is 01 SETTLE Time in seconds that transmission is delayed after the request to send...

Page 597: ...sing echoed characters while the external transmitter is warming up 4 Until the relay connection terminates you can use the standard commands that are available when PROTO is set to SEL 5 The QUIT command terminates the connection If no data are sent to the relay before the port time out period it automatically terminates the connection 6 Enter the sequence CTRL X QUIT CR before entering the prefi...

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Page 599: ...w the ASCII data stream to continue This mechanism allows a single communications channel to be used for ASCII communications e g transmission of a long event report interleaved with short bursts of binary data to support fast acquisition of metering data The device connected to the other end of the link requires software that uses the separate data streams to exploit this feature The binary comma...

Page 600: ... Meter Configuration Block A5D2 Demand Fast Meter Data Message A5C3 Peak Demand Fast Meter Configuration Block A5D3 Peak Demand Fast Meter Data Message A5B9 Fast Meter Status Acknowledge A5CE Fast Operate Configuration Block A5E0 Fast Operate Remote Bit Control A5E3 Fast Operate Breaker Control Table D 2 ASCII Configuration Message List Request to Relay ASCII Response From Relay ID ASCII Firmware ...

Page 601: ...ge 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 0300 SEL protocol with Fast Operate and fast message unsolicited SER messaging 0301 LMD protocol with Fast Operate and fast message unsolicited SER messagi...

Page 602: ...for delta connected voltages 01 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 564200000000 Analog channel name VB or VBC for delta connected voltages 01 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 564300000000 Analog channel name VC or VCA for delta connected voltages 01 Analog channel type FF Scale factor type 0...

Page 603: ...ndex 04 VA channel index VAB for delta 05 VB channel index VBC for delta 06 VC channel index VCA for delta 00 Reserved checksum 1 byte checksum of all preceding bytes Table D 4 A5C1 Fast Meter Configuration Block Sheet 3 of 3 Data Description Table D 5 A5D1 Fast Meter Data Block Data Description A5D1 Command 9E Length 1 byte 1 Status Byte 80 bytes X and Y components of IA IB IC IN VA VAB VB VBC VC...

Page 604: ...ssage 494E00000000 Analog channel name IN 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 494700000000 Analog channel name IG 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 334932000000 Analog channel name 3I2 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50412B000000...

Page 605: ...factor offset in Fast Meter message 51332B000000 Analog channel name Q3 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50412D000000 Analog channel name PA 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 50422D000000 Analog channel name PB 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fa...

Page 606: ... 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 51432D000000 Analog channel name QC 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 51332D000000 Analog channel name Q3 02 Analog channel type FF Scale factor type 0000 Scale factor offset in Fast Meter message 00 Reserved checksum 1 byte checksum of preceding byte...

Page 607: ... Operate code clear remote bit RB3 22 Operate code set remote bit RB3 42 Operate code pulse remote bit RB3 03 Operate code clear remote bit RB4 23 Operate code set remote bit RB4 43 Operate code pulse remote bit RB4 04 Operate code clear remote bit RB5 24 Operate code set remote bit RB5 44 Operate code pulse remote bit RB5 05 Operate code clear remote bit RB6 25 Operate code set remote bit RB6 45 ...

Page 608: ...t 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 remote bit RB13 0D Operate code clear remote bit RB14 2D Operate code set remote bit RB14 4D Operate code pulse remote bit RB14 0E Operate code clear remote bit RB15 2E Operate code set remote bit RB15 4E Operate code pulse remote bit RB15 0F Opera...

Page 609: ... time 0 SV4DO 30 SV4 dropout time is 30 cycles via the SET L command SV4 RB4 SV4 input is RB4 OUT104 SV4T route SV4 timer output to OUT104 To pulse the contact send the A5E006430DDB command to the relay A5E3 Fast Operate Breaker Control The external device sends the message shown in Table D 10 to perform a fast breaker open close The relay performs the specified breaker operation if the following ...

Page 610: ...yy CR BFID SELBOOT 311 R102 yyyy CR LF CID xxxx yyyy CR LF DEVID STATION A yyyy CR LF DEVCODE 30 yyyy CR LF PARTNO 035170H4554XXX yyyy CR LF CONFIG 111122 yyyy CR LF SPECIAL 1 yyyy CR LF ETX The ID message is available from Access Level 0 and higher Per Fast Operate reset code repeat 00 Fast Operate reset code e g 00 for target reset 54415220520D 00 Fast Operate reset description string e g TAR R ...

Page 611: ...LV LOP yyyy CR LF SFAST SSLOW IN106 IN105 IN104 IN103 IN102 IN101 yyyy CR LF LB1 LB2 LB3 LB4 LB5 LB6 LB7 LB8 yyyy CR LF LB9 LB10 LB11 LB12 LB13 LB14 LB15 LB16 yyyy CR LF RB1 RB2 RB3 RB4 RB5 RB6 RB7 RB8 yyyy CR LF RB9 RB10 RB11 RB12 RB13 RB14 RB15 RB16 yyyy CR LF LT1 LT2 LT3 LT4 LT5 LT6 LT7 LT8 yyyy CR LF LT9 LT10 LT11 LT12 LT13 LT14 LT15 LT16 yyyy CR LF SV1 SV2 SV3 SV4 SV1T SV2T SV3T SV4T yyyy CR ...

Page 612: ...settings The name string starts with SER1 followed by SER2 and SER3 For example If SER1 50A1 OUT101 SER2 67P1T 81D1T SER3 OUT102 52A the name string will be 50A1 OUT101 67P1T 81D1T OUT102 52A If there are more than eight settings in SER the SNS message will have several rows Each row will have eight strings followed by the checksum and carriage return The last row may have less than eight strings ...

Page 613: ...ay ASCII commands The Compressed ASCII commands allow an external device to obtain data from the relay in a format which directly imports into spreadsheet or database programs and which can be validated with a checksum The SEL 351 provides the following Compressed ASCII commands Command Description CASCII Configuration message CSTATUS Status message CHISTORY History message CEVENT Event message ...

Page 614: ...CII name for the Compressed ASCII command as sent by the requesting device The naming convention for the Compressed ASCII commands is a C preceding the typical command For example CSTATUS abbreviated to CST is the compressed STATUS command I1 is the minimum access level at which the command is available H identifies a header line to precede one or more data lines is the number of subsequent ASCII ...

Page 615: ...ompressed ASCII Commands CASCII Command General Format 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 Available yyyy CR LF ETX ...

Page 616: ...R LF 13H IA IB IC IN IG VA kV VAB kV VB kV VBC kV VC kV VCA kV VS kV VDC FREQ TRIG Names of elements in the relay word rows 2 62 separated by spaces yyyy CR LF 60D F F F F F F F F F I F 2S 122S yyyy CR LF CEV C 1 yyyy CR LF 1H FID yyyy CR LF 1D 45S yyyy CR LF 7H MONTH DAY YEAR HOUR MIN SEC MSEC yyyy CR LF 1D I I I I I I I yyyy CR LF 14H FREQ SAM CYC_A SAM CYC_D NUM_OF_CYC EVENT LOCATION SHOT TARGE...

Page 617: ...R LF MONTH DAY YEAR HOUR MIN SEC MSEC yyyy CR LF xxxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR LF IA IB IC IN 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 LF xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR LF ETX where xxxx are the data values corresponding to th...

Page 618: ...yyy CR LF REC_NUM MONTH DAY YEAR HOUR MIN SEC MSEC EVENT LOCATION CURR FREQ GROUP SHOT TARGETS yyyy CR LF xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx yyyy CR LF ETX the last line is then repeated for each record If the history buffer is empty the relay responds STX No Data Available yyyy CR LF ETX where xxxx are the data values corresponding to the first line labels ...

Page 619: ...nt number 1 29 if LER 15 1 15 if LER 30 defaults to 1 Sx x samples per cycle 4 or 16 defaults to 4 If Sx parameter is present it overrides the L parameter Ly y cycles event report length 1 LER for filtered event reports 1 LER 1 for raw event reports defaults to LER if not specified L 16 samples per cycle overridden by the Sx parameter if present R specifies raw unfiltered data defaults to 16 sampl...

Page 620: ...2 59Q 59V1 27S 59S1 59S2 59VP 59VS SF 25A1 25A2 3P27 3P59 81D1 81D2 81D3 81D4 81D5 81D6 27B81 50L 81D1T 81D2T 81D3T 81D4T 81D5T 81D6T VPOLV LOP SFAST SSLOW IN106 IN105 IN104 IN103 IN102 IN101 LB1 LB2 LB3 LB4 LB5 LB6 LB7 LB8 LB9 LB10 LB11 LB12 LB13 LB14 LB15 LB16 RB1 RB2 RB3 RB4 RB5 RB6 RB7 RB8 RB9 RB10 RB11 RB12 RB13 RB14 RB15 RB16 LT1 LT2 LT3 LT4 LT5 LT6 LT7 LT8 LT9 LT10 LT11 LT12 LT13 LT14 LT15 ...

Page 621: ...ppropriate tables in Section 9 Setting the Relay using the above format A typical HEX ASCII Relay Word is shown below 10000004924900000000000000000000000000000200000000000000000000 0000280000800000800000000000000000000000000000000000001F8000 Each bit in the HEX ASCII Relay Word reflects the status of a Relay Word bit The order of the labels in the Names of elements in the relay word separated by s...

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Page 623: ...ple make time delay setting 67Q1D 1 50 for negative sequence definite time overcurrent element 67Q1T Refer to Figure 3 12 and Figure 3 13 for more information on negative sequence instantaneous and definite time overcurrent elements Negative sequence instantaneous overcurrent elements 50Q5 and 50Q6 do not have associated timers compare Figure 3 13 to Figure 3 12 If 50Q5 or 50Q6 need to be used for...

Page 624: ...current element 51QT To avoid having negative sequence time overcurrent element 51QT with such low time dial settings trip for this transient negative sequence current condition make settings similar to the following SV6PU 1 50 cycles minimum response time transient condition lasts less than 1 5 cycles SV6 51Q run pickup of negative sequence time overcurrent element 51QT through SELOGIC control eq...

Page 625: ...greatest concern for coordination This is usually the phase overcurrent device with the longest clearing time Step 3 Consider the negative sequence overcurrent element as an equivalent phase overcurrent element Derive pickup time dial lever curve type or time delay settings for this equivalent element to coordinate with the downstream phase overcurrent device as any phase coordination would be per...

Page 626: ... load current limits the sensitivity of the feeder phase overcurrent element 51F to a pickup of 600 A The feeder relay cannot back up the line recloser for phase faults below 600 A where IF Maximum load current through feeder relay 450 A IR Maximum load current through line recloser 150 A 51F Feeder relay phase time overcurrent element 51QF Feeder relay negative sequence time overcurrent element 5...

Page 627: ...51EP element pickup of 300 A has twice the sensitivity of the 51F element pickup of 600 A The 51EP element speed of operation for phase to phase faults below about 2000 A is faster than that for the 51F element Convert Equivalent Phase Overcurrent Element Settings to Negative Sequence Overcurrent Element Settings Guideline 4 The equivalent phase overcurrent element 51EP element in Figure F 4 conve...

Page 628: ...s plus any emergency load conditions The bus phase overcurrent element pickup is often set at least four times greater than the pickup of the feeder phase overcurrent element it backs up Thus sensitivity to both bus and feeder phase faults is greatly reduced Feeder relay backup by the bus relay is limited Negative sequence overcurrent elements at the distribution bus can be set significantly below...

Page 629: ...ercurrent Elements Coordinating Negative Sequence Overcurrent Elements element whether it operates faster or slower than its complementary ground overcurrent element will operate faster than the upstream negative sequence overcurrent element for all faults including those that involve ground ...

Page 630: ... of the coordination guidelines and example given in this appendix The paper also contains analyses of system unbalances and faults and the negative sequence current generated by such conditions A F Elneweihi Useful Applications for Negative Sequence Overcurrent Relaying 22nd Annual Western Protective Relay Conference Spokane Washington October 24 26 1995 This conference paper gives many good appl...

Page 631: ... control schemes This appendix shows how to set the protection and control elements Relay Word bits in the SELOGIC control equations Additional SELOGIC control equation setting details are available in Section 9 Setting the Relay see also SELOGIC Control Equation Settings Serial Port Command SET L on page SET 18 See the SHO Command Show View Settings on page 10 26 for a list of the factory setting...

Page 632: ...uts of the phase time overcurrent element Phase Time Overcurrent Element 51PT Pickup Indication If the maximum phase current is at or below the level of the phase time overcurrent pickup setting 51PP Relay Word bit 51P is in the following state 51P 0 logical 0 If the maximum phase current is above the level of the phase time overcurrent pickup setting 51PP Relay Word bit 51P is in the following st...

Page 633: ... for a phase time overcurrent element demonstrating Relay Word bit operation for pickup time out and reset conditions Other Relay Word bits e g those for definite time overcurrent elements voltage elements frequency elements behave similarly in their assertion or deassertion to logical 1 or logical 0 respectively The time overcurrent elements like the preceding phase time overcurrent element examp...

Page 634: ...ing Relay Word bits together using one or more of the six SELOGIC control equation operators listed in Table G 1 Operators in a SELOGIC control equation setting are processed in the order shown in Table G 1 SELOGIC Control Equation Parentheses Operator More than one set of parentheses can be used in a SELOGIC control equation setting For example the following SELOGIC control equation setting has t...

Page 635: ...IN101 NOT IN101 With a 52b contact connected if the circuit breaker is closed the 52b contact is open and input IN101 is de energized IN101 0 logical 0 52A IN101 NOT IN101 NOT 0 1 Thus the SELOGIC control equation circuit breaker status setting 52A sees a closed circuit breaker With a 52b contact connected if the circuit breaker is open the 52b contact is closed and input IN101 is energized IN101 ...

Page 636: ...tory setting example are When setting ER sees a logical 0 to logical 1 transition it generates an event report if the relay is not already generating a report that encompasses the new transition The rising edge operators in the above factory setting example allow setting ER to see each transition individually Suppose a ground fault occurs and a breaker failure condition finally results Figure G 1 ...

Page 637: ... ER was ER 51P 51G OUT103 the ER setting would not see the assertion of OUT103 because 51G and 51P would continue to be asserted at logical 1 as shown in Table G 1 SELOGIC Control Equation Falling Edge Operator The falling edge operator is applied to individual Relay Word bits only not to groups of elements within parentheses The falling edge operator operates similar to the rising edge operator b...

Page 638: ...cations assisted or switch onto fault trip logic in this example respective SELOGIC control equation trip settings TRCOMM and TRSOTF are not used The only effective input into logic gate OR 1 in Figure 5 1 is SELOGIC control equation trip setting TR TR 51PT 51GT 50P1 SH0 fuse saving example TRCOMM 0 not used set directly to logical 0 TRSOTF 0 not used set directly to logical 0 ULTR 51P 51G discuss...

Page 639: ...1 logical 1 With SH0 0 and 50P1 1 the ANDed combination results in 50P1 SH0 1 0 0 logical 0 and no trip results from phase instantaneous overcurrent element 50P1 A trip will eventually result if time overcurrent element 51PT or 51GT times out If residual ground time overcurrent element 51GT times out Relay Word bit 51GT is in the following state 51GT 1 logical 1 When shot 1 SH0 0 and the result is...

Page 640: ...e overcurrent element 51PT is subject only to the directional control See Figure 3 14 for phase time overcurrent element 51PT logic If the directional control enable setting E32 N and 51PTC 1 then time overcurrent element 51PT is enabled assuming pickup setting 51PP is made and nondirectional SELOGIC Control Equation Limitations Any single SELOGIC control equation setting is limited to 15 Relay Wo...

Page 641: ...settings are saved the SEL 351 responds with the following message xxx Elements and yy Edges remain available indicating that xxx Relay Word bits can still be used and yy rising or falling edge operators can still be applied in the SELOGIC control equations for the particular settings group Table G 2 SELOGIC Control Equation Settings Limitations for Different SEL 351 Models Model Number SELOGIC Co...

Page 642: ...tches LB8 LB1 LB16 LB9 Section 7 Remote Control Switches RB8 RB1 RB16 RB9 Section 7 Power Elements PWRA1 PWRA2 PWRA3 PWRA4 PWRB1 PWRB2 PWRB3 PWRB4 PWRC1 PWRC2 PWRC3 PWRC4 3PWR1 3PWR2 3PWR3 3PWR4 Section 3 Miscellaneous Instantaneous Overcurrent Elements 50A1 50A4 50B1 50B4 50C1 50C4 50A 50B 50C 50AB1 50AB4 50BC1 50BC4 50CA1 50CA4 50L 50P5 50P6 50QF 50QR 50Q5 50Q6 50GF 50GR 50G5 50G6 50N5 50N6 Sect...

Page 643: ...PT1 LOG1 PT2 LOG2 BT PT Z3RB EKEY KEY WFC ECTT UBB2 PTRX2 UBB1 PTRX1 UBB DSTRT Z3XT NSTRT STOP BTX PTRX TRIP Section 5 Close Logic CL ULCL Reclosing Relay 79RI 79RIS 79DTL 79DLS 79SKP 79STL 79BRS 79SEQ 79CLS CL ULCL 79RI 79RIS 79DTL 79DLS 79SKP 79STL 79BRS 79SEQ 79CLS 79LO 79CY 79RS RCSF RSTMN OPTMN CLOSE CF SH0 SH1 SH2 SH3 SH4 Section 6 Breaker Monitor BKMON BKMON BCWA BCWB BCWC BCW Section 8 SEL...

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Page 645: ...ements Relay Word contact I O targets sequential events recorder breaker monitor relay summary event reports settings groups and time synchronization The SEL 351 supports DNP point re mapping Two modes of operation both of which are detailed in this appendix are available Standard for backwards and cross platform compatibility Extended with additional features NOTE The response to the VER command ...

Page 646: ... 1 DECPLV Voltages Scaling Decimal Places 0 3 1 DECPLM Misc Data Scaling Decimal Places 0 3 1 STIMEO Seconds to Select Operate Time out 0 0 30 1 0 DRETRY Data Link Retries 0 15 3 DTIMEO Seconds to Data Link Time out 0 5 1 MINDLY Minimum Seconds from DCD to Tx 0 00 1 0 05 MAXDLY Maximum Seconds from DCD to Tx 0 00 1 0 10 PREDLY Settle Time from RTS ON to Tx OFF 0 00 30 sec 0 00 PSTDLY Settle Time f...

Page 647: ...ime from RTS ON to Tx OFF 0 00 30 sec 0 00 PSTDLY Settle Time from Tx to RTS OFF 0 00 30 sec 0 00 ANADBA Amps Reporting Dead Band Counts 0 32767 100 ANADBV Volts Reporting Dead Band Counts 0 32767 100 ANADBM Misc Data Reporting Dead Band Counts 0 32767 100 UNSOL Enable Unsolicited Reporting Y N N PUNSOL Enable Unsolicited Reporting at Power up Y N N REPADR DNP Address to Report to 0 65534 0 NUMEVE...

Page 648: ...k to CTS in cases where the external transceiver does not support DCD When the SEL 351 transmits a DNP message it delays transmitting after asserting RTS by at least the time in the PREDLY setting After transmitting the last byte of the message the SEL 351 delays for at least PSTDLY milliseconds before deasserting RTS If the PSTDLY time delay is in progress RTS still high following a transmission ...

Page 649: ... a message will be corrupted Thus the number of retries should be set higher on noisy channels Set the data link time out long enough to allow for the worst case response of the master plus transmission time When the SEL 351 decides to transmit on the DNP link it has to wait if the physical connection is in use The SEL 351 monitors physical connections by using CTS input treated as a Data Carrier ...

Page 650: ...CLASS to a non zero value Set UNSOL N Set CLASSA to a non zero value Set CLASSB to a non zero value Set CLASSC to a non zero value Set UNSOL N Unsolicited Report by Exception The slave devices send unsolicited event data to the master and the master occasionally sends integrity polls for static data Set ECLASS to a non zero value Set UNSOL Y Set NUMEVE and AGEEVE according to how often messages ar...

Page 651: ...aximum application layer retries None Requires application layer confirmation When reporting Event Data Data link confirm time out Configurable Complete application fragment time out None Application confirm time out Configurable Complete Application response time out None Executes control WRITE binary outputs Always Executes control SELECT OPERATE Always Executes control DIRECT OPERATE Always Exe...

Page 652: ...ce Profile In all cases within the device profile that an item is configurable it is controlled by SEL 351 settings Default counter object variation Object 20 Variation 6 Counter roll over 16 bits Sends multifragment responses No Table H 4 SEL 351 DNP3 Device Profile Sheet 2 of 2 Parameter Value ...

Page 653: ...17 28 2 3 Binary Input Change with Rela tive 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 2e 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 2...

Page 654: ...it Counter Change Event without Time 1 6 7 8 129 130 17 28 22 3 32 Bit Delta Counter Change Event without Time 22 4 16 Bit Delta Counter Change Event without Time 22 5 32 Bit Counter Change Event with Time 1 6 7 8 129 17 28 22 6 16 Bit Counter Change Event with Time 1 6 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 Count...

Page 655: ...zen Analog Input with Time of Freeze 31 4 16 Bit Frozen Analog Input with Time of Freeze 31 5 32 Bit Frozen Analog Input without Flag 31 6 16 Bit Frozen Analog Input without Flag 32 0 Analog Change Event All Vari ations 1 6 7 8 32 1 32 Bit Analog Change Event without Time 1 6 7 8 129 17 28 32 2e 16 Bit Analog Change Event without Time 1 6 7 8 129 130 17 28 32 3 32 Bit Analog Change Event with Time...

Page 656: ...nd Date CTO All Varia tions 51 1 Time and Date CTO 51 2 Unsynchronized Time and Date CTO 07 quantity 1 52 0 Time Delay All Variations 52 1 Time Delay Coarse 52 2 Time Delay Fine 129 07 quantity 1 60 0 All Classes of Data 1 20 21 6 60 1 Class 0 Data 1 6 60 2 Class 1 Data 1 20 21 6 7 8 60 3 Class 2 Data 1 20 21 6 7 8 60 4 Class 3 Data 1 20 21 6 7 8 70 1 File Identifier 80 1 Internal Indications 2 0 ...

Page 657: ...Medium Packed Binary Coded Decimal 101 3 Large Packed Binary Coded Decimal No object 13 14 23 a Supported in requests from master b May generate in response to master c Decimal d Hexadecimal e Default variation Table H 5 SEL 351 DNP Object Table Sheet 5 of 5 Object Requesta Responseb Obj Var Description Func Codesc Qual Codesd Func Codesc Qual Codesd ...

Page 658: ... 01 02 1023 An unread relay event is available 01 02 1024 Settings change or relay restart 01 02b 1025 A more recent unread relay event is available 10 12 00 15 Remote bits RB1 RB16 10 12 16 Pulse Open command OC 10 12 17 Pulse Close command CC 10 12 18 Reset demands 10 12 19 Reset demand peaks 10 12 20 Reset energies 10 12 21 Reset breaker monitor 10 12 22 Reset front panel targets 10 12 23 Read ...

Page 659: ...30 32a 64 67 A B C and 3 phase demand MW in 30 32a 68 71 A B C and 3 phase demand MVAR in 30 32a 72 75 A B C and 3 phase demand MW out 30 32a 76 79 A B C and 3 phase demand MVAR out 30 32 80 85 Peak demand IA IB IC IN IG and 3I2 magnitudes 30 32a 86 89 A B C and 3 phase peak demand MW in 30 32a 90 93 A B C and 3 phase peak demand MVAR in 30 32a 94 97 A B C and 3 phase peak demand MW out 30 32a 98 ...

Page 660: ...xtended mode Analog inputs 28 35 42 57 64 79 86 104 and 106 are further scaled according to the DECPLM setting e g if DECPLM is 3 then the value is multiplied by 1000 Analog inputs 58 63 80 85 107 115 119 and the even numbered points in 0 7 and 16 21 current magnitudes are scaled according to the DECPLA setting The even numbered points in 8 15 and 22 27 voltage magnitudes are scaled according to t...

Page 661: ...en read and the related analogs 106 113 do not contain valid data Analog inputs 116 122 are derived from the present active group settings If the associated setting is set to OFF the value will be reported as 1 Control Relay Output Blocks object 12 variation 1 are supported The control relays correspond to the remote bits and other functions as shown above The Trip Close bits take precedence over ...

Page 662: ...d relay event summary To read the oldest relay event summary the master should Pulse On binary output point 23 This will load the relay event summary analogs points 105 113 123 126 with information from the oldest relay event summary discarding the values from the previous load After reading the analogs the master should again check binary input point 1023 which will be on if there is another unre...

Page 663: ...onological order unless binary input point 1025 is set which the master can use to identify when a newer relay event summary is available In extended mode DNPE DNP events are generated whenever the values in points 105 113 123 126 change Events are detected every second by the scanning process The master can collect relay event summaries using event data rather than the static data polling describ...

Page 664: ...e DNP command is issued with an S parameter the relay displays only the analog map likewise a T causes the relay to display only the binary map If the map checksum is determined to be invalid the map will be reported as corrupted during a display command as follows DNP T STX Binaries Map Corrupted ETX If the map is determined to be corrupted DNP will respond to all master data requests with an unk...

Page 665: ...ata Scaling Decimal Places 0 3 DECPLM Seconds to Select Operate Time out 0 0 30 0 STIMEO Data Link Retries 0 for no confirm 1 15 DRETRY Seconds to Data Link Time out interval 0 5 DTIMEO Minimum Seconds from DCD to Tx 0 00 1 00 MINDLY Maximum Seconds from DCD to Tx 0 00 1 00 MAXDLY Settle Time from RTS ON to Tx OFF 0 00 30 00 sec PREDLY Settle Time from Tx to RTS OFF 0 00 30 00 sec PSTDLY Analog Re...

Page 666: ...ng Decimal Places 0 3 DECPLM Seconds to Select Operate Time out 0 0 30 0 STIMEO Data Link Retries 0 for no confirm 1 15 DRETRY Seconds to Data Link Time out interval 0 5 DTIMEO Minimum Seconds from DCD to Tx 0 00 1 00 MINDLY Maximum Seconds from DCD to Tx 0 00 1 00 MAXDLY Settle Time from RTS ON to Tx OFF 0 00 30 00 sec PREDLY Settle Time from Tx to RTS OFF 0 00 30 00 sec PSTDLY Amps Reporting Dea...

Page 667: ... BITS channels differentiated by the channel specifiers A and B Bits transmitted are called TMB1x through TMB8x where x is the channel specifier e g A or B and are controlled by the corresponding SELOGIC control equations Bits received are called RMB1x through RMB8x and are usable as inputs to any SELOGIC control equations Channel status bits are called ROKx RBADx CBADx and LBOKx and are also usab...

Page 668: ... select one of the default values for each RMB 2 Enter the synchronization process described below The relay will assert ROKx only after successful synchronization as described below and two consecutive messages pass all of the data checks described above After ROKx is reasserted received data may be delayed while passing through the security counters described below Transfer of received data to R...

Page 669: ...ects two consecutive errors it transmits attention until it receives an attention with its own TXID included If three or four relays are connected in a ring topology then the attention message will go all the way around the loop and eventually will be received by the originating node It will then be killed and data transmission will resume This method of synchronization allows the relays to determ...

Page 670: ...nnel unavailability exceeds a user settable threshold the relay will assert a user accessible flag hereafter called CBADx Re sync The MIRRORED BITS device at the other end of the link detected an error Data error Received data was not self consistent or the address was wrong Relay disabled Relay protection functions disabled as during power up or change in settings or settings group Loop Back Loop...

Page 671: ... modem is identical to the standard MIRRORED BITS protocol with the following exceptions The relay injects a delay idle time between messages The length of the delay is one relay processing interval The relay resets RTS to a negative voltage 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 MIRRO...

Page 672: ... relay will deassert the RTS signal on the EIA 232 connector Also the relay will monitor the CTS signal on the EIA 232 connector which the modem will deassert if the channel has too many errors The modem uses the relay s RTS signal to determine whether the new or old MIRRORED BITS protocol is in use Seconds to Mirrored Bits Rx Bad Pickup 1 10000 RBADPU 60 Use the RBADPU setting to determine how lo...

Page 673: ... Dropout Debounce msgs 1 8 RMB1DO 1 Mirrored Bits RMB_ Pickup Debounce msgs 1 8 RMB2PU 1 Mirrored Bits RMB_ Dropout Debounce msgs 1 8 RMB2DO 1 Mirrored Bits RMB_ Pickup Debounce msgs 1 8 RMB3PU 1 Mirrored Bits RMB_ Dropout Debounce msgs 1 8 RMB3DO 1 Mirrored Bits RMB_ Pickup Debounce msgs 1 8 RMB4PU 1 Mirrored Bits RMB_ Dropout Debounce msgs 1 8 RMB4DO 1 Mirrored Bits RMB_ Pickup Debounce msgs 1 8...

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Page 675: ...1PU MIRRORED BITS RMB_Dropout Debounce msgs 1 8 RMB1DO MIRRORED BITS RMB_Pickup Debounce msgs 1 8 RMB2PU MIRRORED BITS RMB_Dropout Debounce msgs 1 8 RMB2DO MIRRORED BITS RMB_Pickup Debounce msgs 1 8 RMB3PU MIRRORED BITS RMB_Dropout Debounce msgs 1 8 RMB3DO MIRRORED BITS RMB_Pickup Debounce msgs 1 8 RMB4PU MIRRORED BITS RMB_Dropout Debounce msgs 1 8 RMB4DO MIRRORED BITS RMB_Pickup Debounce msgs 1 8...

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Page 677: ...l port The normal serial interface consists of ASCII character commands and reports that are intelligible to people using a terminal or terminal emulation package The binary data streams can interrupt the ASCII data stream to obtain information and then allow the ASCII data stream to continue This mechanism allows a single communications channel to be used for ASCII communications e g transmission...

Page 678: ...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 finite number of writes Exceeding the limit can result in an EEPROM self test failure An average of one state change every ...

Page 679: ...t SER messages Step 2 When SER records are triggered in the SEL 351 the relay responds with an unsolicited binary Fast SER message If this message has a valid checksum it must be acknowledged by sending an acknowledge message with the same response number as contained in the original message The relay will wait approximately 100 ms to 500 ms to receive an acknowledge message at which time the rela...

Page 680: ...smits it If there are more than nn new records available or if the first and last record are separated by more than 16 seconds the relay will break the transmission into multiple messages so that no message contains more than nn records and the first and last record of each message are separated by no more than 16 seconds If the function to enable is not 18 or the function code is not recognized t...

Page 681: ...Enable Unsolicited Data Transfer and the Disable Unsolicited Data Transfer messages to indicate which type of unsolicited data should be enabled or disabled The message format for function code 18 is shown in Table J 3 Table J 2 Function Code 02 Message Format Data Description A546 Message header 10 Message length 16 decimal 0000000000 Five bytes reserved for future use as a routing address YY Sta...

Page 682: ...ed in the time of day field FFFFFFFE Four byte end of records flag ssssssss Packed four byte element status for up to 32 elements LSB for the 1st element cccc Two byte CRC 16 checkcode for message Data Description A546 Message header 22 Message length 34 decimal 0000000000 Five bytes reserved for future use as a routing address YY Status Byte 01 need acknowledgement 03 settings changed and need ac...

Page 683: ...lay with all of SER1 SER2 and SER3 set to NA A5 46 0E 00 00 00 00 00 00 81 02 XX cc cc XX is as same as the response number in the Enable Unsolicited Data Transfer message to which it responds 3 Disable Unsolicited Fast SER Data Transfer message acknowledge requested 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 Fast ...

Page 684: ...elay sends an SER message packet it will put a sequential number 0 1 2 3 0 1 into the response number If the relay does not receive an acknowledge from the master before approximately 500 mS the relay will resend the same message packet with the same response number until it receives an acknowledge message with that response number For the next SER message the relay will increment the response num...

Page 685: ...ents from SEL relays with integrated Waveform and Harmonic Analysis tools Communicate with SEL devices via an HMI interface with integrated Meter and Control functions Create manage copy merge and read relay settings with a settings database manager This document gives instructions for installing ACSELERATOR QuickSet software A Quick Tour guide is available as part of the online help After install...

Page 686: ... QuickSet System Requirements CPU Pentium class recommended 90 MHz or faster Operating System Windows 95 98 with 16 MB ram 32 MB ram recommended Windows NT4 SP3 or later with 32 MB ram 64 MB ram recommended Windows 2000 with 64 MB ram Disk Space 25 Mb Communications EIA 232 serial port for communicating with the relay CD drive required for installation ...

Page 687: ...ct Run from the windows start menu b Type the following command D SETUP substitute D with the CD ROM drive letter of your PC Step 3 Follow the steps that appear on the screen The installation program will perform all the necessary steps to load ACSELERATOR QuickSet software onto your PC It is necessary to have the correct comctl32 dll file installed on your computer in order to see the toolbar but...

Page 688: ...R QuickSet Software Starting ACSELERATOR QuickSet Software You can start ACSELERATOR QuickSet software the following ways Step 4 Double click the ACSELERATOR QuickSet software icon if you have a desktop shortcut Step 5 Choose Programs SEL Applications and select the ACSELERATOR QuickSet software icon to start the program ...

Page 689: ...l SEL Synchrophasors Overview The SEL 351 provides Phasor Measurement Control Unit PMCU capabilities when connected to an IRIG B time source with an accuracy of 10 μs or better Synchrophasor data are available via the MET PM ASCII command and the SEL Fast Message Unsolicited Write message ...

Page 690: ...nal analysis Power system disturbance analysis The SEL 351 Global settings class contains the synchrophasor settings including the choice of transmitted synchrophasor data set The Port settings class selects which serial port s can be used for synchrophasor protocol use See Settings on page L 8 Synchrophasor measurement cannot be enabled if global setting PTCONN DELTA The SEL 351 timekeeping funct...

Page 691: ...rd During steady state conditions the SEL 351 synchrophasor values can be directly compared to values from other phasor measurement units that conform to C37 118 Synchrophasor values are available for the full frequency range of the SEL 351 Figure L 1 Phase Reference The TSOK Relay Word bit asserts when the SEL 351 has determined that the IRIG B time source has sufficient accuracy and the synchrop...

Page 692: ... the measured phasor angles in order to create the corrected phasor angles as shown in Figure L 2 The VCOMP and ICOMP settings may be positive or negative in value Figure L 2 Waveform at Relay Terminals May Have a Phase Shift If the shift of the measured signal is known in the time domain it can be converted into an angular shift using Equation L 1 Equation L 1 Figure L 3 Correction of Measured Ph...

Page 693: ...t Message Protocol Format Field Description Hex Data Header Synchrophasor Fast Message A546 Frame Size Synchrophasor Data Sizea a The synchrophasor data size is dependent on the PHDATAV and PHDATAI settings as shown in Table L 8 XX Routing Must be 0000000000 for this application 0000000000 Status Byte Must be 00 for this application 00 Function Code 20h Code for unsolicited write messages 20 Seque...

Page 694: ... Fast Message commands including commands to start and stop synchrophasor data transmission Table L 2 Unsolicited Fast Message Enable Packet Field Description Hex Data Header Synchrophasor Fast Message A546 Frame Size 18 bytes 12 Routing Must be 0000000000 for this application 0000000000 Status Byte YY 00 acknowledge is not requested YY 01 acknowledge is requested YY Function Code 01h Enable unsol...

Page 695: ...ssage Message Period Hex Fast Messages Sent This Number of Seconds After the Top of Each Minute Number of Fast Messages per Minute 0064h 0 1 2 3 4 5 59 60 00C8h 0 2 4 6 8 10 58 30 012Ch 0 3 6 9 12 15 57 20 0190h 0 4 8 12 15 56 15 01F4h 0 5 10 15 20 55 12 0258h 0 6 12 18 24 54 10 03E8h 0 10 20 30 40 50 6 05DCh 0 15 30 45 4 07D0h 0 20 40 3 0BB8h 0 30 2 1770h 0 1 ...

Page 696: ...s not available if global setting PTCONN DELTA Enable Synchronized Phasor Measurement Y N Nb b Set EPMU Y to access the remaining settings PMID PMU Hardware ID 1 PHDATAV Phasor Data Set Voltages V1 ALL V1 VCOMP Voltage Angle Compensation Factor 179 99 to 180 degrees 0 00 PHDATAIc c Setting hidden when PHDATAV V1 Phasor Data Set Currents ALL NA NA ICOMP Current Angle Compensation Factor 179 99 to 1...

Page 697: ...uch data to transmit PHDATAV and PHDATAI determine the minimum port SPEED necessary to support the synchrophasor data packet rate and size see Table L 8 PHDATAV V1 will transmit only positive sequence voltage V1 PHDATAV ALL will transmit V1 VA VB and VC Table L 8 describes the order of synchrophasors inside the data packet The VCOMP setting allows correction for any steady state voltage phase erro...

Page 698: ...RIG time source When TS_TYPE is set to IEEE the IRIG message is expected to conform to the IEEE C37 118 standard Note that time sources conforming to IEEE C37 118 may be marked as IEEE 1344 compliant The IRIG message includes a UTC offset time quality information a year and a parity bit The SEL 351 qualifies the IRIG field to ensure that the time is valid checks for a time quality value better tha...

Page 699: ... of the SEL 351 See IRIG B on page 10 2 Table L 7 Time Synchronization Relay Word Bits Name Description TIRIG Asserts while relay time is based on IRIG B time source TSOK Time Synchronization OK Asserts while time accuracy is of sufficient accuracy for synchrophasor measurement and satisfies TS_TYPE requirements PMDOK Phasor Measurement Data OK Asserts when the SEL 351 is enabled synchrophasors ar...

Page 700: ...ss of the Global settings PHDATAV and PHDATAI The MET PM command can function even when no serial ports are sending fast message synchrophasor data The MET PM command only displays data when the Relay Word bit TSOK logical 1 Figure L 4 shows a sample MET PM command response The synchrophasor data are also available in ACSELERATOR QuickSet and have a similar format to Figure L 4 The MET PM time com...

Page 701: ...86 11 669 11 682 ANG DEG 129 896 10 262 111 764 129 48 Phase Currents Pos Sequence Current IA IB IC I1 MAG A 195 146 192 614 198 090 195 283 ANG DEG 114 930 2 786 120 238 117 338 FREQ Hz 60 029 Digitals SV3 SV4 SV5 SV6 SV7 SV8 SV9 SV10 0 0 0 0 0 0 0 0 SV11 SV12 SV13 SV14 SV15 SV16 0 0 0 0 0 0 Figure L 4 Sample MET PM Command Response The Maximum time synchronization error field is taken directly f...

Page 702: ...s bits The selection of synchrophasor data will add to the byte requirements Each synchrophasor quantity will add eight bytes to the message length Table L 8 shows the effect that adding synchrophasor quantities has on the minimum allowed SPEED setting The number of interleaved protocols sharing the same physical port will also impact the minimum allowed SPEED setting Table L 8 shows the setting i...

Page 703: ...orded between dates d1 and d2 inclusive COM p m na Show COM report for MIRRORED BITS channel p using failure records m through n m 1 512 COM p na Show a COM report for MIRRORED BITS channel p using the latest n failure records n 1 512 where 1 is the most recent entry COM p Ca Clears communications records for MIRRORED BITS channel p or both channels if p is not specified COM C command COM La For a...

Page 704: ... format Enter k for repeat count MET X k Display same data as MET command with phase to phase voltages and Vbase Enter k for repeat count k 1 32767 if not specified default is 1 QUI Quit Returns to Access Level 0 Terminates SEL Distributed Port Switch Protocol LMD connection SER Show entire Sequential Events Recorder SER report SER d1 Show all rows in the SER report recorded on the specified date ...

Page 705: ...ct n where n is one of ALARM OUT101 OUT107 OUT201 OUT212 for k seconds Specify parameter n k 1 30 seconds if not specified default is 1 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 Relay Word bit RBn Remot...

Page 706: ...he relay VER Show relay configuration and firmware version a Available in firmware versions 6 and 7 Key Stroke Commands Ctrl Q Send XON command to restart communications port output previously halted by XOFF Ctrl S Send XOFF command to pause communications port output Ctrl X Send CANCEL command to abort current command and return to current access level prompt Key Stroke Commands When Using SET Co...

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