13.8
SEL-351A Relay Instruction Manual Date Code 20080213
Testing and Troubleshooting
Testing Methods and Tools
Testing Via Sequential Events Recorder
You can set the relay to generate an entry 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–SER3). See
Section 12: Standard Event Reports 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 the pickup of the phase time-
overcurrent element. Element 51PT asserts when the phase time-overcurrent
element times out. The assertion and deassertion of these elements is time-
stamped in the SER report. Use this method to verify timing associated with
time-overcurrent elements, reclosing relay operation, etc. Do not forget to
reenter the correct relay settings when you are ready to place the relay in
service.
Courtesy of NationalSwitchgear.com
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