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SEL-351A Relay Instruction Manual Date Code 20080213
Table of Contents
Multiple Setting Groups.................................................................................................................................7.18
SEL
OGIC Control Equation Variables/Timers................................................................................................7.27
Output Contacts .............................................................................................................................................7.31
Rotating Default Display (Only on Models With LCD)................................................................................7.34
Section 8: Breaker Monitor and Metering
Overview..........................................................................................................................................................8.1
Breaker Monitor...............................................................................................................................................8.2
Station DC Battery Monitor (Not in SEL-351A-1) .......................................................................................8.15
Demand Metering ..........................................................................................................................................8.20
Energy Metering ............................................................................................................................................8.28
Maximum/Minimum Metering ......................................................................................................................8.29
Small Signal Cutoff for Metering ..................................................................................................................8.31
Synchrophasor Metering................................................................................................................................8.32
Section 9: Setting the Relay
Overview..........................................................................................................................................................9.1
Settings Changes Via the Front Panel (Only on Models With LCD) ..............................................................9.2
Settings Changes Via the Serial Port ...............................................................................................................9.2
Time-Overcurrent Curves ................................................................................................................................9.4
Relay Word Bits (Used in SEL
OGIC Control Equations)...............................................................................9.16
Settings Explanations.....................................................................................................................................9.34
Settings Sheets ...............................................................................................................................................9.42
SEL-351A Settings Sheets
SEL-351A-1 Settings Sheets
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-351A Command Summary
Section 11: Front-Panel Interface (Only on Models With LCD)
Overview........................................................................................................................................................11.1
Front-Panel Pushbutton Operation.................................................................................................................11.2
Functions Unique to the Front-Panel Interface..............................................................................................11.6
Rotating Default Display .............................................................................................................................11.12
Section 12: Standard Event Reports and SER
Overview........................................................................................................................................................12.1
Standard 15/30-Cycle Event Reports.............................................................................................................12.2
Sequential Events Recorder (SER) Report ..................................................................................................12.21
Example Standard 15-Cycle Event Report ..................................................................................................12.24
Example Sequential Events Recorder (SER) Report ...................................................................................12.30
Section 13: Testing and Troubleshooting
Overview........................................................................................................................................................13.1
Testing Philosophy.........................................................................................................................................13.2
Testing Methods and Tools ............................................................................................................................13.5
Relay Self-Tests .............................................................................................................................................13.9
Relay Troubleshooting.................................................................................................................................13.11
Relay Calibration .........................................................................................................................................13.13
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