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SEL-751A Relay Instruction Manual Date Code 20100129
Table of Contents
Analog Outputs............................................................................................................................................ 4.104
Station DC Battery Monitor ........................................................................................................................ 4.105
Breaker Monitor .......................................................................................................................................... 4.105
Digital Input Debounce ............................................................................................................................... 4.105
Data Reset.................................................................................................................................................... 4.107
Access Control............................................................................................................................................. 4.107
Time Synchronization Source ..................................................................................................................... 4.108
Port Settings (SET P Command)................................................................................................................. 4.108
Front-Panel Settings (SET F Command)..................................................................................................... 4.112
Report Settings (SET R Command) ............................................................................................................ 4.122
DNP Map Settings (Set DNP n command, n = 1, 2, or 3)........................................................................... 4.124
Modbus Map Settings (SET M Command)................................................................................................. 4.125
Section 5: Metering and Monitoring
Overview ......................................................................................................................................................... 5.1
Power Measurement Conventions ................................................................................................................... 5.2
Metering .......................................................................................................................................................... 5.2
Load Profiling................................................................................................................................................ 5.11
Station DC Battery Monitor .......................................................................................................................... 5.11
Breaker Monitor ............................................................................................................................................ 5.15
Section 6: Settings
Overview ......................................................................................................................................................... 6.1
View/Change Settings With Front Panel ......................................................................................................... 6.2
View/Change Settings Over Communications Port......................................................................................... 6.4
Setting Entry Error Messages.......................................................................................................................... 6.5
SEL-751A Settings Sheets
Section 7: Communications
Overview ......................................................................................................................................................... 7.1
Communications Interfaces ............................................................................................................................. 7.1
Communications Protocols............................................................................................................................ 7.11
SEL ASCII Protocol and Commands............................................................................................................ 7.13
Section 8: Front-Panel Operations
Overview ......................................................................................................................................................... 8.1
Front-Panel Layout.......................................................................................................................................... 8.1
Human-Machine Interface............................................................................................................................... 8.2
Operation and Target LEDs ........................................................................................................................... 8.12
Section 9: Analyzing Events
Overview ......................................................................................................................................................... 9.1
Event Reporting............................................................................................................................................... 9.2
Sequential Events Recorder (SER) Report.................................................................................................... 9.15
Section 10: Testing and Troubleshooting
Overview ....................................................................................................................................................... 10.1
Testing Tools.................................................................................................................................................. 10.1
Commissioning Tests..................................................................................................................................... 10.2
Periodic Tests (Routine Maintenance)......................................................................................................... 10.11
Self-Test....................................................................................................................................................... 10.12
Troubleshooting........................................................................................................................................... 10.14
Factory Assistance....................................................................................................................................... 10.15
Appendix A: Firmware and Manual Versions
Firmware......................................................................................................................................................... A.1
Instruction Manual.......................................................................................................................................... A.4
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