Circuit Breaker Lockout; Completing The Test - ABB RET670 Commissioning Manual

1MRK 504 165-UEN A
11.12.1.4
11.12.1.5
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
outputs should be active. Functional outputs TRIP, all TRLn and TR3P should
be active during second fault.
7. Initiate a phase-to-phase fault and switch it off immediately when the trip
signal is issued for the corresponding two phases. Initiate a second phase-to-
phase fault between two other phases within the time interval, shorter
thantEvolvingFault (default setting 2.0s).
Check, that the output signals, issued for the first fault, correspond to a two-
trip for included phases. The output signals generated by the second fault
must correspond to the three-phase tripping action.

Circuit breaker lockout

The following tests should be carried out when the built-in lockout function is used
in addition to possible other tests, which depends on the complete configuration of
an IED.
1. Check that AutoLock and TripLockout are both set to Off.
2. Activate shortly the set lockout (SETLKOUT) signal in the IED.
3. Check that the circuit breaker lockout (CLLKOUT) signal is set.
4. Activate shortly thereafter, the reset lockout (RSTLKOUT) signal in the IED.
5. Check that the circuit breaker lockout (CLLKOUT) signal is reset.
6. Initiate a three-phase fault.
A three-phase trip should occur and all trip outputs TRL1, TRL2, TRL3
should be activated. Functional outputs TRIP and TR3P should be active at
each fault. The output CLLKOUT should not be set.
7. Activate the automatic lockout function, set AutoLock = On and repeat.
Besides the TRIP outputs, CLLKOUT should be set.
8. Reset the lockout signal by activating the reset lockout (RSTLKOUT) signal.
9. Activate the trip signal lockout function, set TripLockout = On and repeat.
All trip outputs (TRL1, TRL2, TRL3) and functional outputs TRIP and TR3P
must be active and stay active after each fault, CLLKOUT should be set.
10. Reset the lockout.
All functional outputs should reset.
11. Deactivate the trip signal lockout function, set TripLockout = Off and the
automatic lockout function, set AutoLock = Off.

Completing the test

Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
Section 11
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