13.8
SEL-311C Relay Instruction Manual Date Code 20060320
Testing and Troubleshooting
Testing Methods and Tools
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.
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