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3.3
62
Current reversal and weak end infeed
logic for distance protection (ZCAL)
Change all settings cyclically for other faults (L2-N and L3-N).
Weak end infeed set for trip
1.
Apply input signals according table 4.
2.
Activate the carrier receive (ZCOM-CR or ZC1P-CRLn) signal
of the terminal.
3.
After the relay has operated, turn off the input signals.
4.
Check that trip, carrier-send signal, and indication are ob-
tained.
5.
Repeat the procedure for other phases.
Only when ZC1P is used.
Weak end infeed set for echo
1.
Apply input signals according table 4.
2.
Activate the carrier receive (ZCOM-CR or ZC1P-CRLn) signal
of the terminal.
3.
After the relay has operated turn off the input signals.
4.
Check that the carrier send signal is obtained.
5.
Repeat the procedure for other phases.
Only when ZC1P is used.
Completing the test
Continue to test another function or complete the test by setting the test mode to off.
Chapter 10
Verifying settings by secondary
injection
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