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E.12

SEL-751A Relay Instruction Manual Date Code 20100129

Modbus RTU Communications

Communications Protocol

40 01, 05 RB14

41 01, 05 RB15

42 01, 05 RB16

43 01, 05 RB17

44 01, 05 RB18

45 01, 05 RB19

46 01, 05 RB20

47 01, 05 RB21

48 01, 05 RB22

49 01, 05 RB23

50 01, 05 RB24

51 01, 05 RB25

52 01, 05 RB26

53 01, 05 RB27

54 01, 05 RB28

55 01, 05 RB29

56 01, 05 RB30

57 01, 05 RB31

58 01, 05 RB32

59 01, 05 Pulse RB01

60 01, 05 Pulse RB02

61 01, 05 Pulse RB03

62 01, 05 Pulse RB04

63 01, 05 Pulse RB05

64 01, 05 Pulse RB06

65 01, 05 Pulse RB07

66 01, 05 Pulse RB08

67 01, 05 Pulse RB09

68 01, 05 Pulse RB10

69 01, 05 Pulse RB11

70 01, 05 Pulse RB12

71 01, 05 Pulse RB13

72 01, 05 Pulse RB14

73 01, 05 Pulse RB15

Table E.14 01h, 05h SEL-751A Output (Sheet 3 of 4)

Coil Address (Decimal) Function Code Supported Coil Description

Main Page

Default Chapter3
- Table of Contents3
List of Tables7
- List of Figures13
- Manual Overview19
Preface19
- Conventions20
- Typographic Conventions20
- Safety and General Information21
- Overview27
- Features27
Section 1: Introduction and Specifications27
- Models, Options, and Accessories28
  - Monitoring Features28
  - Communications and Control28
- Table 1.1 Voltage Input Options29
- Accessories30
- Figure 4.42 Voltage30
- Applications31
- Figure 1.1 Typical Current Connections31
- Getting Started32
- Specifications36
- Relay Placement41
- Physical Location41
Section 2: Installation41
- Overview41
- I/O Configuration42
- Relay Mounting42
- Figure 2.1 Relay Panel-Mount Dimensions42
- Figure 2.2 Slot Allocations for Different Cards43
- Base-Unit Communications Ports (Slot B)44
- Table 2.1 Communication Ports44
- Voltage Card Option45
  - Table 2.2 Communication Card Interfaces and Connectors45
  - Table 2.3 3 AVI Voltage Card Terminal Designation45
  - Enhanced Voltage Card Option with Advanced Metering and Protection Package (5 AVI)46
  - Enhanced Voltage Card Option with Monitoring Package46
  - Voltage Card Option with Arc-Flash Detection (AFD) Inputs (3 AVI/4 AFDI)46
  - I/O (3 DI/4 DO/1 AO) Card Terminal Allocation48
  - I/O Input Card48
  - RTD (10 RTD) Card Terminal Allocation48
- Figure 2.5 Current Output Jumpers52
- Figure 2.6 Voltage Output Jumpers52
- Table 2.13 Jumper Functions and Default Positions53
- Figure 2.8 Rear-Panel Connections of Selected Cards54
- Rear-Panel and Side-Panel Diagrams55
- Rear-Panel Connections55
  - Figure 2.9 Fiber-Optic Serial, Ethernet, EIA-232 Communication, 3 DI/4 DO/1 AO, and 3 AVI Voltage Option55
  - Grounding (Earthing) Connections57
  - Power Connections57
  - Serial Ports57
- Figure 2.13 Control I/O Connections-4 AI/4 AO Option in Slot D and Fiber-Optic Port in Slot B59
- Figure 2.14 Control I/O Connections-Internal RTD Option59
- AC/DC Control Connection Diagrams60
- Fail-Safe/Nonfail-Safe Tripping60
- Figure 2.15 Output OUT103 Relay Output Contact Configuration60
- Figure 2.16 OUT103 Contact Fail-Safe and Nonfail-Safe Options60
- Single Phase-Neutral VT Connection61
  - Figure 2.17 Single-Phase Voltage Connections61
  - Direct Connection62
  - Open-Delta VT Connection62
  - Wye-Wye VT Connection62
- Figure 2.19 Typical Current Connections63
- Figure 2.20 SEL-751A Provides Overcurrent Protection and Reclosing for a Distribution Feeder (Includes Fast Bus Trip Scheme) (Delta-Connected Pts)64
- Figure 2.21 SEL-751A Provides Overcurrent Protection for a Distribution Bus (Includes Fast Bus Trip Scheme) (Wye-Connected Pts)65
- Figure 2.22 SEL-751A Provides Overcurrent Protection for a Delta-Wye Transformer Bank (Wye-Connected Pts)66
- Figure 2.23 SEL-751A Provides Overcurrent Protection for a Transformer Bank with a Tertiary Winding (Wye-Connected Pts)67
- Figure 2.24 SEL-751A Provides Overcurrent Protection for an Industrial Distribution Feeder (Core-Balance Current Transformer Connected to Channel IN)68
- Arc-Flash Protection: System Installation69
- Light-Sensor Installation69
- Figure 2.25 SEL-751A with an Arc-Flash Option Card and Fiber-Optic-Based Point-Sensor69
- Figure 2.26 Jacketed-Fiber Installation Example70
- Figure 2.27 Connecting Sensor Fibers to the Relay70
- Figure 2.28 Point-Sensor Assembly70
- Figure 2.29 Point-Sensor Installation71
- Figure 2.30 Point-Sensor Directivity (0-360° Around the Mounting Plane)71
- Figure 2.31 Point-Sensor Directivity (Front to Back, above the Mounting Plane)72
- Bare-Fiber Sensor Installation73
- Figure 2.33 Bare-Fiber Sensor Assembly73
- Figure 2.34 Bare-Fiber Sensor Mounting Example73
- Figure 2.35 Bare-Fiber Sensor Components (V-Pin Style)73
- Application Example74
- Figure 2.36 Bare-Fiber Sensor Showing Transition from Bare- to Jacketed-Fiber Section74
- Field Serviceability75
  - Figure 2.37 Switchgear Application Example75
  - Fuse Replacement76
  - Real-Time Clock Battery Replacement76
  - Quickset SEL-5030 Software77
Section 3: PC Software77
- Overview77
- Table 3.1 SEL Software Solutions77
- Setup78
- Figure 3.4 Tools Menu80
- Figure 3.5 Device Response to the ID Command80
- Settings Database Management and Drivers81
  - Active Database81
  - Database Manager81
- Settings82
- Figure 3.9 Expressions Created with Expression Builder86
- Event Analysis87
  - Event Waveforms87
  - Text Files87
- Figure 3.10 Composite Screens for Retrieving Events87
- Meter and Control88
- Figure 3.11 Saving the Retrieved Event88
- Figure 3.12 Device Overview Screen89
- Figure 3.13 Control Screen90
- Figure 3.14 Remote Operation Selection90
- Table 3.4 Help91
- Protection and Logic Functions93
Section 4: Protection and Logic Functions Overview94
- Application Data95
- Group Settings (SET Command)95
- Table 4.1 Identifier Settings95
- Table 4.2 CT Configuration Settings95
- Table 4.3 Voltage Configuration Settings96
- Basic Protection97
  - VNOM Range Check97
  - Overcurrent Elements97
- Table 4.4 Maximum Phase Overcurrent Settings97
- Table 4.5 Neutral Overcurrent Settings98
- Figure 4.1 Instantaneous Overcurrent Element Logic99
- Table 4.6 Residual Overcurrent Settings100
- Figure 4.2 Ground Fault Protection Using Core-Balance CT100
- Time-Overcurrent Elemetns101
- Table 4.7 Negative-Sequence Overcurrent Settings101
- Table 4.8 Phase A, B, and C Time-Overcurrent Settings102
- Table 4.9 Maximum Phase Time-Overcurrent103
- Figure 4.3 Phase Time-Overcurrent Elements 51AT, 51BT, and 51CT103
- Table 4.10 Negative-Sequence Time-Overcurrent Settings104
- Figure 4.4 Maximum Phase Time-Overcurrent Elements 51P1T and 51P2T104
- Table 4.11 Neutral Time-Overcurrent Settings105
- Figure 4.5 Negative-Sequence Time-Overcurrent Element 51QT105
- Table 4.12 Residual Time-Overcurrent Settings106
- Figure 4.6 Neutral Time-Overcurrent Elements 51N1T and 51N2T106
- Time-Overcurrent Curves107
- Figure 4.7 Residual Time-Overcurrent Elements 51G1T and 51G2T107
- Relay Word Bit108
- Table 4.13 Equations Associated with U.S. Curves108
- Table 4.14 Equations Associated with IEC Curves108
- Figure 4.8 U.S. Moderately Inverse Curve: U1109
- Figure 4.9 U.S. Inverse Curve: U2110
- Figure 4.10 U.S. very Inverse Curve: U3111
- Figure 4.11 U.S. Extremely Inverse Curve: U4112
- Figure 4.12 U.S. Short-Time Inverse Curve: U5113
- Figure 4.13 IEC Class a Curve (Standard Inverse): C1114
- Figure 4.14 IEC Class B Curve (very Inverse): C2115
- Figure 4.15 IEC Class C Curve (Extremely Inverse): C3116
- Figure 4.16 IEC Long-Time Inverse Curve: C4117
- Figure 4.17 IEC Short-Time Inverse Curve: C5118
- RTD-Based Protection119
  - RTD Input Function119
  - RTD Location119
  - Table 4.15 RTD Settings119
  - RTD Trip/Warning Levels120
  - RTD Type120
- Table 4.16 RTD Resistance Versus Temperature120
- Voltage-Based Protection121
- Table 4.17 Undervoltage Settings121
- Overvoltage Function122
  - Table 4.18 Overvoltage Settings122
  - Synchronism-Check Elements126
  - Setting SYNCPH127
  - Voltage Input VS Connected Phase-To-Phase or Beyond Delta-Wye Transformer127
  - Wye-Connected Voltages127
  - Figure 4.23 Three-Phase Power Elements Logic135
  - Table 4.20 Power Element Settings135
  - Figure 4.24 Power Elements Operation in the Real/Reactive Power Plane136
  - Figure 4.25 Power Factor Elements Logic137
  - Table 4.21 Power Factor Settings137
  - LOP Impact on Other Protection Elements138
  - LOP Monitoring and Alarms138
  - Loss-Of-Potential (LOP) Protection138
- Frequency Protection139
- Frequency Elements139
- Table 4.22 Frequency Settings139
- Figure 4.26 Loss-Of-Potential (LOP) Logic139
- Rate-Of-Change of Frequency Protection140
- Table 4.23 Rate-Of-Change-Of-Frequency Settings140
- Figure 4.27 Over- and Underfrequency Element Logic140
- Figure 4.28 81R Frequency Rate-Of-Change Scheme Logic141
- Trip/Close Logic142
- Trip/Close Logic Settings142
  - Table 4.24 Time Window Versus 81Rntp Setting142
  - TDURD Minimum Trip Time143
  - TR Trip Conditions SEL Control Equation143
- Figure 4.30 Close Logic145
- Reclose Supervision Logic146
- Close Failure Logic146
  - Figure 4.31 Reclose Supervision Logic (Following Open Interval Time-Out)146
  - Set Reclose Supervision Logic148
  - Unlatch Reclose Supervision Logic149
- Reclose Logic151
- Reclosing Relay Open Interval Time-Out151
  - Figure 4.34 Reclosing Relay States and General Operation152
  - Table 4.26 Relay Word Bit and Front-Panel Correspondence to Reclosing Relay States152
  - Lockout State153
  - Reclosing Relay States and Settings/ Setting Group Changes153
  - Close Logic Can Still Operate When the Reclosing Relay Is Defeated154
  - Defeat the Reclosing Relay154
  - Open Interval Timers155
- Figure 4.36 Reclose Blocking for Islanded Generator163
- Figure 4.37 Sequence Coordination between the SEL-751A and a Line Recloser165
- Figure 4.38 Operation of SEL-751A Shot Counter for Sequence Coordination with Line Recloser (Additional Settings Example 1)166
- Demand Metering168
- Reclose Supervision Setting (79CLS)168
- Table 4.30 Demand Meter Settings168
- Comparison of Thermal and Rolling Demand Meters169
  - Figure 4.40 Demand Current Logic Outputs169
  - Figure 4.41 Response of Thermal and Rolling Demand Meters to a Step Input (Setting DMTC = 15 Minutes)170
  - Rolling Demand Meter Response171
  - Thermal Demand Meter Response171
- Logic Settings (SET L Command)173
  - Latch Bits173
  - SELOGIC Enables173
  - Table 4.32 Latch Bits Equation Settings174
  - Make Latch Control Switch Settings with Care175
  - Nonvolatile State175
  - Power Loss175
  - Settings Change175
  - Boolean NOT Operator177
  - Math Negation Operator177
  - Parentheses Operator177
- Table 4.36 Counter Input/Output Description181
- Table 4.37 Order of Precedence of the Control Inputs181
- Figure 4.49 Example of the Effects of the Input Precedence182
- Table 4.38 Control Output Equations and Contact Behavior Settings183
- Global Settings (SET G Command)184
- Event Messenger Points184
- Table 4.39 General Global Settings184
- Table 4.40 Event Messenger Settings184
- Figure 4.50 Phase Rotation Setting184
- Synchrophasor Measurement186
- Breaker Failure Setting186
- Table 4.41 Setting Group Selection186
- Table 4.42 Breaker Failure Setting186
- Arc-Flash Protection187
- Arc-Flash Overcurrent Elements187
- Table 4.43 Arc-Flash Overcurrent Settings187
- Figure 4.51 Breaker Failure Logic187
- Table 4.44 Arc-Flash Time-Overlight Settings188
- Figure 4.52 Arc-Flash Instantaneous Overcurrent Element Logic188
- TOL Element Logic Diagram189
- Figure 4.53 Inverse Time-Overlight Element Logic189
- Setting the Arc-Flash Time-Overlight Element190
- Table 4.45 Typical Ambient Illumination Light Levels190
- Figure 4.54 TOL Element Inverse Curve Characteristic190
- Output Logic Programming191
- Analog Inputs192
  - Analog Input Calibration Process192
  - Analog Input Setting Example192
- Figure 4.55 Analog Input Card Adaptive Name192
- Table 4.46 Summary of Steps193
- Analog (DC Transducer) Input Board194
- Figure 4.56 Settings to Configure Input 1 as a 4-20 Ma Transducer194
- Analog Outputs195
- Table 4.47 Analog Input Card in Slot 3195
- Figure 4.57 Analog Output Number Allocation195
- Station DC Battery Monitor196
- Table 4.48 Output Setting for a Card in Slot 3196
- Figure 4.58 Analog Output Settings196
- Breaker Monitor197
- Digital Input Debounce197
- Figure 4.59 DC Mode Processing197
- Figure 4.60 AC Mode Processing197
- Table 4.49 Slot C Input Debounce Settings198
- Figure 4.61 Timing Diagram for Debounce Timer Operation When Operating in AC Mode198
- Data Reset199
- Access Control199
- Time Synchronization Source199
- Table 4.50 Setting Change Disable Setting199
- Port Settings (SET P Command)200
- Table 4.51 Time Synchronization Source Setting200
- Table 4.52 Front-Panel Serial Port Settings200
- Table 4.53 Ethernet Port Settings200
- Table 4.54 Fiber-Optic Serial Port Settings201
- Table 4.55 Rear-Panel Serial Port (EIA-232) Settings202
- Table 4.56 Rear-Panel Serial Port (EIA-232/EIA-485) Settings202
- Front-Panel Settings (SET F Command)203
  - Table 4.57 Rear-Panel Devicenet Port Settings203
  - Table 4.58 Display Point and Local Bit Default Settings203
  - Boolean Display Point Entry Composition204
  - Display Points204
- Table 4.59 LCD Display Settings204
- Hidden (no Display)205
  - Table 4.60 Settings that Always, Never, or Conditionally Hide a Display Point205
  - Name String, Alias String, and Either Set String or Clear String Only206
  - Name, Alias, Set String, and Clear String206
- Table 4.61 Entries for the Four Strings206
- Figure 4.62 Display Point Settings206
- Figure 4.63 Front-Panel Display-Both HV and LV Breakers Open206
- Figure 4.64 Front-Panel Display-HV Breaker Closed, LV Breaker Open206
- Analog Display Point Entry Composition207
  - Figure 4.65 Front-Panel Display-Both HV and LV Breakers Closed207
  - Figure 4.66 Front-Panel Display-HV Breaker Open, LV Breaker Closed207
  - Figure 4.67 Front-Panel Display-HV Breaker Open, LV Breaker Closed207
  - Figure 4.68 Front-Panel Display for a Binary Entry in the Name String Only207
  - Table 4.62 Binary Entry in the Name String Only207
  - Figure 4.69 Front-Panel Display for an Analog Entry in the Name String Only208
  - Table 4.63 Analog Entry in the Name String Only208
  - Table 4.64 Entry in the Name String and the Alias Strings208
  - Figure 4.70 Front-Panel Display for an Entry in (A) Boolean Name and Alias Strings and (B) Analog Name and User Text and Formatting Strings209
  - Figure 4.71 Front-Panel Display for an Entry in (A) Boolean Name and Alias Strings and (B) Analog Name, User Text and Formatting Strings, and Engineering Units209
  - Table 4.65 Example Settings and Displays209
  - Figure 4.72 Adding Temperature Measurement Display Points210
  - Figure 4.73 Rotating Display210
  - Local Bits211
  - Target LED Settings212
- Figure 4.74 Adding Two Local Bits212
- Pushbutton Leds213
- Table 4.66 Target LED Settings213
- Table 4.67 Pushbutton LED Settings213
- Report Settings (SET R Command)214
- SER Chatter Criteria214
  - Table 4.68 Auto-Removal Settings214
  - Relay Word Bitaliases215
  - SER Trigger Lists215
- Table 4.69 SER Trigger Settings215
- Table 4.70 Enable Alias Settings215
- Table 4.71 SET R SER Alias Settings215
- DNP Map Settings (Set DNP N Command, N = 1, 2, or 3)216
- Table 4.72 Event Report Settings216
- Table 4.73 Load Profile Settings216
- Table 4.74 DNP Map Settings216
- Modbus Map Settings (SET M Command)217
- Table 4.75 User Map Register Settings217
Section 5: Metering and Monitoring219
- Overview219
- Power Measurement Conventions220
- Metering220
- Figure 5.1 Complex Power Measurement Conventions220
- Fundamental Metering221
- Table 5.1 Measured Fundamental Meter Values221
- Thermal Metering222
- Table 5.2 Thermal Meter Values222
- Figure 5.2 METER Command Report with Enhanced Voltage Option with Monitoring Package222
- Energy Metering223
- Table 5.3 RTD Input Status Messages223
- Figure 5.3 METER T Command Report with Rtds223
- Figure 5.4 Device Response to the METER E Command223
- Maximum and Minimum Metering224
- Table 5.4 Maximum/Minimum Meter Values224
- Figure 5.5 Device Response to the METER RE Command224
- Math Variable Metering225
  - Figure 5.6 Device Response to the METER M Command225
  - Figure 5.7 Device Response to the METER RM Command225
  - Figure 5.8 Device Response to the METER MV Command225
  - Analog Input Metering226
  - RMS Metering226
- Table 5.5 RMS Meter Values226
- Figure 5.9 Device Response to the METER RMS Command226
- Figure 5.10 Device Response to the METER AI Command226
- Arc-Flash Light Intensity Metering227
- Table 5.6 Demand Values227
- Figure 5.11 Device Response to the METER L (Light) Command227
- Figure 5.12 Device Response to the MET de Command227
- Synchrophasor Metering228
- Table 5.7 Synchrophasor Measured Values228
- Figure 5.13 Device Response to the MET PE Command228
- Load Profiling229
- Station DC Battery Monitor229
- Figure 5.14 Device Response to the LDP Command229
- Create Desired Logic for DC Under- and Overvoltage Alarming230
  - Figure 5.15 DC Under- and Overvoltage Elements230
  - Table 5.8 Station DC Battery Monitor Settings230
  - Additional Application232
  - Analyze Station DC Battery Voltage232
  - Station DC Battery Voltage Dips During Circuit Breaker Tripping232
  - View Station DC Battery Voltage232
  - Station DC Battery Voltage Dips Anytime233
  - Station DC Battery Voltage Dips During Circuit Breaker Closing233
- Breaker Monitor233
- Table 5.9 Breaker Maintenance Information for a 25 Kv Circuit Breaker234
- Table 5.10 Breaker Monitor Settings234
- Figure 5.17 Plotted Breaker Maintenance Points for a 25 Kv Circuit Breaker235
- Breaker Maintenance Curve Details236
- Figure 5.18 SEL-751A Breaker Maintenance Curve for a 25 Kv Circuit Breaker236
- Breaker Monitor Operation Example237
  - Figure 5.19 Operation of SEL OGIC Control Equation Breaker Monitor Initiation Setting237
  - Figure 5.20 Breaker Monitor Accumulates 10 Percent Wear238
  - Figure 5.21 Breaker Monitor Accumulates 25 Percent Wear239
  - Figure 5.22 Breaker Monitor Accumulates 50 Percent Wear240
  - Figure 5.23 Breaker Monitor Accumulates 100 Percent Wear241
  - Breaker Monitor Output242
  - Via Front Panel242
  - Via Serial Port242
  - View or Reset Breaker Monitor Information242
  - Determination of Relay Initiated Trips and Externally Initiated Trips243
- Figure 5.24 Input Inxxx Connected to Trip Bus for Breaker Monitor Initiation243
Section 6: Settings245
- Overview245
- Table 6.1 Methods of Accessing Settings245
- View/Change Settings with Front Panel246
- Figure 6.1 Front-Panel Setting Entry Example247
- View/Change Settings over Communications Port248
  - View Settings248
  - Enter Settings248
- Table 6.2 SHOW Command Options248
- Table 6.3 SET Command Options248
- Setting Entry Error Messages249
- Table 6.4 SET Command Editing Keystrokes249
- Table 6.5 SET Command Format249
SEL-751A Settings Sheets251
- Identifier251
- Maximum Phase Overcurrent251
- Neutral Overcurrent252
- Residual Overcurrent252
- Negative-Sequence Overcurrent253
- Phase Time Overcurrent253
- Maximum Phase Time Overcurrent254
- Negative-Sequence Time Overcurrent255
- Neutral Time Overcurrent255
- Residual Time Overcurrent256
- Undervoltage258
- Overvoltage259
- Synchronism Check259
- Power Factor260
- Frequency260
- Rate-Of-Change of Frequency261
- Power262
- Reclosing Control262
- Sv/Timers265
- Counters Equations268
- Math Variables272
- Base Output273
- Slot C Output274
- Slot D Output274
- Slot E Output274
- Phasor Measurement (PMU)278
- Breaker Failure279
- Input Debounce Settings (Base Unit)285
- Input Debounce Settings (Slot C)285
- Input Debounce Settings (Slot D)286
- Input Debounce Settings (Slot E)286
- SET PORT P (P = F, 1, 2, 3, or 4) Command287
- Modbus292
- DNP3 Protocol292
- Mirrored Bits Protocol293
- DNP3 Map Settings (SET DNP N Command)310
- Binary Output Map313
- Analog Input Map314
Section 7: Communications319
- Overview319
- Table 7.1 SEL-751A Communications Port Interfaces319
- Communications Interfaces320
  - Figure 7.1 Simple Ethernet Network Configuration321
  - Figure 7.2 Ethernet Network Configuration with Dual Redundant Connections (Failover Mode)322
  - Figure 7.3 Ethernet Network Configuration with Ring Structure (Switched Mode)322
  - Dual Network Port Operation323
  - Failover Mode323
  - Fixed Connection Mode323
  - Unmanaged Switch Mode323
  - NETPORT Selection324
  - Port 3 (EIA-232 Option Only)324
  - Terminals B01 and B02324
- Figure 7.4 IRIG-B Input (Relay Terminals B01-B02)324
- Figure 7.5 IRIG-B Input Via EIA-232 Port 3 (SEL Communications Processor as Source)324
- Port 2 (Fiber-Optic Serial Port)325
  - Figure 7.6 IRIG-B Input VIA EIA-232 Port 3 (SEL-2401/2404/2407 Time Source)325
  - Figure 7.7 IRIG-B Input VIA Fiber-Optic EIA-232 Port 2 (SEL-2030/2032 Time Source)325
  - Figure 7.8 IRIG-B Input VIA Fiber-Optic EIA-232 Port 2 (SEL-2401/2404/2407 Time Source)325
  - +5 VDC Power Supply326
  - Connect Your PC to the Relay326
  - Port Connector and Communications Cables326
- Table 7.2 EIA-232/EIA-485 Serial Port Pin Functions326
- Figure 7.9 EIA-232 DB-9 Connector Pin Numbers326
- Figure 7.10 SEL Cable C234A-SEL-751A to DTE Device327
- Figure 7.11 SEL Cable C227A-SEL-751A to DTE Device327
- Figure 7.12 SEL Cable C222-SEL-751A to Modem327
- Figure 7.13 SEL Cable C272A-SEL-751A to SEL Communications Processor Without IRIG-B Signal328
- Figure 7.14 SEL Cable C273A-SEL-751A to SEL Communications Processor with IRIG-B Signal328
- Figure 7.15 SEL Cable C387-SEL-751A to SEL-3010328
- Communications Protocols329
  - Table 7.3 Protocols Supported on the Various Ports329
  - Ethernet Protocols330
  - FTP Server330
- SEL ASCII Protocol and Commands331
  - Message Format331
  - Ping Server331
  - Telnet Server331
  - Software Flow Control332
  - Access Levels333
  - Access Level Functions334
  - Command Summary334
- Table 7.6 Access Commands335
- AFT Command (Arc-Flash Detection Channels Self-Test)336
  - Figure 7.16 AFT Command Response337
  - Table 7.8 ANALOG Command Format337
  - BRE Command (Breaker Monitor Data)339
  - BRE Command (Preload/Reset Breaker Wear)339
  - CEV Command340
  - CLOSE Command (Close Breaker)340
  - COMMUNICATIONS Command340
  - CONTROL Command (Control Remote Bit)341
- Table 7.12 COPY Command342
- Table 7.13 COUNTER Command342
- Table 7.14 Date Command342
- Table 7.15 EVENT Command (Event Reports)343
- Table 7.16 EVENT Command Format343
- Figure 7.17 Ethernet Port (PORT 1) Status Report343
- Figure 7.18 Non-Redundant Port Response343
- Table 7.17 FILE Command344
- Table 7.18 GOOSE Command Variants344
- Table 7.19 GROUP Command346
- Figure 7.19 GOOSE Command Response346
- HELP Command347
  - Table 7.21 HISTORY Command347
  - Table 7.22 IDENTIFICATION Command347
  - Table 7.23 IRI Command347
  - LDP Command (Load Profile Report)348
  - L_D Command (Load Firmware)348
- Table 7.24 LDP Commands348
- Table 7.25 LDP Command Parameters348
- LOOPBACK Command349
  - Table 7.26 L_D Command (Load Firmware)349
  - MAC Command350
  - MET Command (Metering Data)350
  - Table 7.28 Meter Command350
  - Table 7.29 Meter Command Parameters350
  - Table 7.30 Meter Class350
  - OPEN Command (Open Breaker)351
  - PASSWORD Command (Change Passwords)351
- Table 7.31 PASSWORD Command351
- Table 7.32 PAS Command Format351
- Table 7.33 Factory Default Passwords for Access Levels 1 and 2351
- Table 7.34 Valid Password Characters352
- Figure 7.20 PING Command Response352
- PULSE Command353
- Table 7.35 PUL Outnnn Command353
- Table 7.36 QUIT Command353
- Table 7.37 R_S Command (Restore Factory Defaults)353
- Table 7.38 SER Command (Sequential Events Recorder Report)353
- Table 7.39 SER Command Format354
- Table 7.40 SER D Command354
- Table 7.41 SET Command (Change Settings)354
- SHOW Command (Show/View Settings)355
- Table 7.42 SET Command Format355
- Table 7.43 SET Command Editing Keystrokes355
- Table 7.44 SHOW Command (Show/View Settings)356
- Table 7.45 SHOW Command Format356
- Table 7.46 STATUS Command (Relay Self-Test Status)357
- Figure 7.21 SHOW Command Example357
- Table 7.47 STATUS Command Report and Definitions358
- Figure 7.22 Typical Relay Output for STATUS Command358
- Table 7.48 SUMMARY Command359
- Table 7.49 TARGET Command (Display Relay Word Bit Status)359
- Table 7.50 TARGET Command Format359
- Table 7.51 Front-Panel Leds and the TAR 0 Command359
- Table 7.52 TIME Command (View/Change Time)360
- Table 7.53 TRIGGER Command (Trigger Event Report)360
- Front-Panel Layout361
Section 8: Front-Panel Operations361
- Overview361
- Human-Machine Interface362
- Contrast362
- Figure 8.1 Front-Panel Overview362
- Access Level 2 Password Entry363
  - Figure 8.2 Access Level Security Padlock Symbol363
  - Table 8.1 Front-Panel Automatic Messages (FP_AUTO := OVERRIDE)363
  - Front-Panel Menus and Screens364
  - Front-Panel Timeout364
  - Navigating the Menus364
- Figure 8.3 Password Entry Screen364
- Figure 8.4 Front-Panel Pushbuttons364
- Meter Menu365
- Table 8.2 Front-Panel Pushbutton Functions365
- Figure 8.5 Main Menu365
- Figure 8.6 MAIN Menu and METER Submenu366
- Figure 8.7 METER Menu and ENERGY Submenu366
- Figure 8.8 Relay Response When Energy (or Max/Min, Demand, Peak Demand) Metering Is Reset366
- Figure 8.9 Relay Response When no Analog Cards Are Installed366
- Figure 8.10 Relay Response When no Math Variables Enabled367
- Figure 8.11 MAIN Menu and EVENTS Submenu367
- Figure 8.12 EVENTS Menu and DISPLAY Submenu367
- Figure 8.13 Relay Response When no Event Data Available367
- Figure 8.14 Relay Response When Events Are Cleared367
- Figure 8.15 MAIN Menu and TARGETS Submenu368
- Figure 8.16 TARGETS Menu Navigation368
- Figure 8.17 MAIN Menu and CONTROL Submenu368
- Figure 8.18 CONTROL Menu and OUTPUTS Submenu369
- Figure 8.19 CONTROL Menu and LOCAL BITS Submenu369
- Figure 8.20 MAIN Menu and SET/SHOW Submenu370
- Figure 8.21 SET/SHOW Menu371
- Figure 8.22 MAIN Menu and Status Submenu371
- Operation and Target Leds372
- Programmable Leds372
- Figure 8.23 MAIN Menu and Breaker Submenu372
- Figure 8.24 Factory Default Front-Panel Leds372
- Lamp Test373
  - Figure 8.25 Target Reset Pushbutton373
  - Table 8.3 Possible Warning Conditions (Flashing TRIP LED)373
  - Front-Panel Operator Control Pushbuttons374
  - Other Target Reset Options374
- Figure 8.26 Operator Control Pushbuttons and Leds374
- Table 8.4 SEL-751A Front-Panel Operator Control Functions375
- Event Reporting377
Section 9: Analyzing Events377
- Overview377
- Event Reporting378
- Table 9.2 Event Report Current and Voltage Columns383
- Table 9.3 Output, Input, Protection, and Control Element Event Report Columns384
- Example 15-Cycle Event Report385
- Figure 9.3 Example Standard 15-Cycle Event Report 1/4-Cycle Resolution388
- Figure 9.4 Derivation of Event Report Current Values and RMS Current Values from Sampled Current Waveform389
- Figure 9.5 Derivation of Phasor RMS Current Values from Event Report Current Values390
- Sequential Events Recorder (SER) Report391
  - SER Triggering391
  - SER Aliases391
- Figure 9.6 Example Sequential Events Recorder (SER) Event Report391
- Testing Tools393
- Serial Port Commands393
Section 10: Testing and Troubleshooting393
- Overview393
- Commissioning Tests394
- Table 10.1 Serial Port Commands that Clear Relay Data Buffers397
- Current Imbalance Metering Accuracy398
- Table 10.2 Phase Current Measuring Accuracy398
- Table 10.3 Current Unbalance Measuring Accuracy398
- Figure 10.3 Current Source Connections398
- Power and Power Factor Measuring Accuracy399
- Periodic Tests (Routine Maintenance)403
- Table 10.6 Periodic Relay Checks403
- Figure 10.6 CEV R Light Event Capture Example403
- Relay Self-Tests404
- Table 10.8 Troubleshooting406
- Factory Assistance407
Appendix A: Firmware and Manual Versions Firmware410
- Upgrade Instructions419
Appendix B: Firmware Upgrade Instructions419
- Overview419
- Figure B.1 Firmware File Transfer Process420
- SEL Communications Processors423
- SEL Communications Protocols423
  - SEL ASCII Commands423
  - SEL Compressed ASCII Commands423
Appendix C: SEL Communications Processors423
- Table C.1 Supported Serial Command Sets423
Appendix Ddnp3 Communications435
- Overview435
- Introduction to DNP3435
  - Data Handling436
  - Objects436
- Table D.1 DNP3 Implementation Levels436
  - Access Methods437
  - Qualifier Codes and Ranges437
- Table D.2 Selected DNP3 Function Codes437
  - Binary Control Operations438
  - Conformance Testing438
- Table D.3 DNP3 Access Methods438
  - DNP3 Serial Network Issues439
  - DNP3 LAN/WAN Overview439
  - Data Link Layer Operation439
  - Network Medium Contention439
- DNP3 in the SEL-751A440
- Data Access440
- Table D.4 TCP/UDP Selection Guidelines440
- Table D.5 DNP3 Access Methods440
  - Collision Avoidance442
  - Transmission Control442
  - Event Data442
- Figure D.2 Message Transmission Timing442
- Binary Controls443
- Table D.6 SEL-751A Event Buffer Capacity443
  - Time Synchronization444
  - Modem Support444
- Table D.7 Port DNP3 Protocol Settings445
- Table D.8 Serial Port DNP3 Modem Settings446
- Configurable Data Mapping447
- Figure 4.48 Counter448
- Figure D.3 Sample Response to SHO DNP Command448
- Figure D.4 Port MAP Command449
- Table D.9 Sample Custom DNP3 AI Map451
  - Figure D.5 Sample Custom DNP3 AI Map Settings451
  - AI Point Label, Scaling and Deadband in Acselerator Quickset Software452
  - Analog Input Map Entry in Acselerator Quickset Software452
- Figure D.8 Sample Custom DNP3 BO Map Settings453
- Figure D.9 Binary Output Map Entry in AC SEL ERATOR Quickset Software453
- DNP3 Documentation454
- Table D.10 SEL-751A DNP3 Device Profile454
- Table D.11 SEL-751A DNP Object List455
- Table D.12 DNP3 Reference Data Map459
- Table D.13 DNP3 Default Data Map460
  - Binary Inputs461
  - Binary Outputs461
- Table D.14 Example Object 12 Trip/Close or Code Selection Operation461
Appendix E: Modbus RTU Communications463
- Overview463
- Communications Protocol464
  - Modbus Queries464
  - Modbus Responses464
  - Supported Modbus Function Codes464
- Table E.1 Modbus Query Fields464
- Table E.2 SEL-751A Modbus Function Codes464
  - Modbus Exception Responses465
  - Cyclical Redundancy Check465
- Table E.3 SEL-751A Modbus Exception Codes465
- Table E.4 01H Read Discrete Output Coil Status Command465
- Table E.5 Responses to 01H Read Discrete Output Coil Query Errors466
- Table E.6 02H Read Input Status Command466
- Table E.7 02H SEL-751A Inputs467
- 03H Read Holding Register Command470
- Table E.8 Responses to 02H Read Input Query Errors470
- Table E.9 03H Read Holding Register Command471
- Table E.10 Responses to 03H Read Holding Register Query Errors471
- Table E.11 04H Read Input Register Command471
- Table E.12 Responses to 04H Read Input Register Query Errors472
- Table E.13 05H Force Single Coil Command472
- Table E.14 01H, 05H SEL-751A Output472
- 06H Preset Single Register Command475
- Table E.15 Responses to 05H Force Single Coil Query Errors475
- Table E.16 06H Preset Single Register Command476
- Table E.17 Responses to 06H Preset Single Register Query Errors476
- Table E.18 10H Preset Multiple Registers Command476
- Table E.19 10H Preset Multiple Registers Query Error Messages477
- Table E.20 60H Read Parameter Information Command477
- Table E.21 60H Read Parameter Descriptor Field Definition477
- Table E.22 60H Read Parameter Conversion Field Definition478
- Table E.23 Responses to 60H Read Parameter Information Query Errors478
- Table E.24 61H Read Parameter Text Command479
- Table E.25 61H Read Parameter Text Query Error Messages479
- Table E.26 62H Read Enumeration Text Command479
- Table E.27 61H Read Parameter Enumeration Text Query Error Messages480
- Table E.28 7Dh Encapsulated Packet with Control Command480
  - Reading Parameter Information and Value Using Modbus481
  - Modifying Relay Settings Using Modbus481
- Table E.29 7Dh Encapsulated Packet Query Errors481
- Table E.30 7Eh NOP Command481
  - Controlling Output Contacts Using Modbus482
  - User-Defined Modbus Data Region and SET M Command482
- Table E.31 Modbus Register Labels for Use with SET M Command483
- Modbus Register Map488
- Reading History Data Using Modbus488
- Table E.32 Modbus Register Map488
Appendix Fiec 61850 Communications545
- Features545
- Introduction to IEC 61850546
- Table F.1 IEC 61850 Document Set546
- IEC 61850 Operation547
  - Ethernet Networking547
  - Object Models547
  - Data Mapping548
  - Mms548
  - Goose548
- Table F.2 Example IEC 61850 Descriptor Components548
- Table F.3 SEL-751A Logical Devices548
  - File Services549
  - SCL Files549
  - Reports549
- Table F.4 Buffered Report Control Block Client Access550
- Figure F.1 SEL-751A Predefined Reports550
- Table F.5 Unbuffered Report Control Block Client Access551
  - Figure F.2 SEL-751A Datasets551
  - Supplemental Software552
  - Time Stamps and Quality552
  - GOOSE Processing553
- Figure F.3 GOOSE Quality553
- IEC 61850 Configuration554
- Table F.6 IEC 61850 Settings554
  - Acselerator Architect555
  - SEL ICD File Versions555
  - CID File Conversion556
- Table F.7 ICD Logical Nodes Summary556
- Logical Node Extensions560
- Table F.8 Metering and Measurement Logical Nodes560
- Table F.9 Thermal Metering Data560
- Table F.10 MSTA Class561
- Table F.11 MDST Class561
- Logical Nodes562
- Table F.12 Logical Device: PRO (Protection)562
- Table F.13 Logical Device: MET (Metering)565
- Table F.14 Logical Device: con (Control)568
- Table F.15 Logical Device: ANN (Annunciation)568
- Protocol Implementation Conformance Statement569
- Table F.16 PICS for A-Profile Support569
- Table F.17 PICS for T-Profile Support569
- Table F.18 MMS Service Supported Conformance569
- Table F.19 MMS Parameter CBB572
- Table F.20 Alternate Access Selection Conformance Statement572
- Table F.21 Variableaccessspecification Conformance Statement572
- Table F.22 Variablespecification Conformance Statement573
- Table F.23 Read Conformance Statement573
- Table F.24 Getvariableaccessattributes Conformance Statement573
- Table F.25 Definenamedvariablelist Conformance Statement573
- GOOSE Services Conformance Statement574
- Table F.26 Getnamedvariablelistattributes Conformance Statement574
- Table F.27 Deletenamedvariablelist574
- Table F.28 GOOSE Conformance574
- ACSI Conformance Statements575
- Table F.29 ACSI Basic Conformance Statement575
- Table F.30 ACSI Models Conformance Statement575
- Table F.31 ACSI Services Conformance Statement576
- Devicenet Communications581
- Devicenet Card581
Appendix G: Devicenet Communications581
- Figure G.1 Devicenet Card Component Overview581
- Features582
- Electronic Data Sheet583
Appendix H Synchrophasors585
- Overview585
- Synchrophasor Measurement586
- Figure H.1 Phase Reference586
- Figure H.2 Waveform at Relay Terminals May Have a Phase Shift587
- Figure H.3 Correction of Measured Phase Angle587
- Settings for Synchrophasors588
- Table H.1 PMU Settings in the SEL-751A for C37.118 Protocol in Global Settings588
  - Descriptions of Synchrophasor Settings589
  - Mrate589
  - PMSTN and PMID589
- Table H.2 SEL-751A Serial Port Settings for Synchrophasors589
- PHDATAI and ICOMP590
- Table H.3 Synchrophasor Order in Data Stream (Voltages and Currents)590
- Table H.4 User-Defined Analog Values Selected by the NUMANA Setting591
- Table H.5 User-Defined Digital Status Words Selected by the NUMDSW Setting591
- TREA1, TREA2, TREA3, TREA4, and PMTRIG592
- Synchrophasor Relay Word Bits592
- Irigc592
- Table H.6 Synchrophasor Trigger Relay Word Bits592
- View Synchrophasors Using the MET PM Command593
- Table H.7 Time Synchronization Relay Word Bits593
- C37.118 Synchrophasor Protocol594
  - Settings Affect Message Contents594
  - Communications Bandwidth594
- Figure H.4 Sample MET PM Command Response594
- Protocol Operation595
- Table H.8 Size of a C37.118 Synchrophasor Message595
- Table H.9 Serial Port Bandwidth for Synchrophasors (in Bytes)595
  - Transmit Mode Control596
  - Message Transmission597
Appendix I: MIRRORED BITS Communications597
- Overview597
- Operation597
  - Message Reception Overview598
  - Message Decoding and Integrity Checks598
- Table I.1 Number of MIRRORED BITS Messages for Different Baud598
- Settings601
- Table I.4 MIRRORED BITS Communications Message Transmission Period601
- Table I.5 MIRRORED BITS Protocol Settings601
- Table J.1 SEL-751A Relay Word Bits603
Appendix J: Relay Word Bits Overview604
- Table J.2 Relay Word Bit Definitions for the SEL-751A606
Appendix K Analog Quantities617
- Table K.1 Analog Quantities618
Glossary623
Index629
SEL-751A Relay Command Summary633

Sel 751A - Page 474

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