ABB RELION RET670, Commissioning Manual, Page: 278 / 328

single-pole trip should occur for each separate fault and only one of the trip outputs
(TR_A, TR_B, TR_C) should be activated at a time. Functional outputs TRIP and
TR1P should be active at each fault. No other outputs should be active.
3. Initiate different phase-to-phase faults one at a time.
Take an adequate time interval between faults into consideration, to overcome a
reset time which is activated by SMBRREC (79). Only a two-phase trip should occur
for each separate fault and only corresponding two trip outputs (TR_A, TR_B,
TR_C) should be activated at a time. Functional outputs TRIP and TR2P should be
active at each fault. No other outputs should be active.
4. Initiate a three-phase fault.
5. Initiate a single phase-to-ground fault and switch it off immediately when the trip
signal is issued for the corresponding phase. Initiate the same fault once again within
the reset time of the used SMBRREC (79).
A single-phase fault shall be given at the first fault. A three-pole trip must be initiated
for the second fault. Check that the corresponding trip signals appear after both
faults. Functional outputs TRIP, TR_A, TR_B, TR_C and TR1P should be active
during first fault. No other outputs should be active. Functional outputs TRIP, all
TR_A, TR_B, TR_C and TR3P should be active during second fault.
6. Initiate a single phase-to-ground fault and switch it off immediately when the trip
signal is generated for the corresponding phase. Initiate the second single-phase-to-
ground fault in one of the remaining phases within the time interval, shorter than
tEvolvingFault (default setting 2.0s) and shorter than the dead-time of SMBRREC
(79), when included in the protection scheme.
7. Check, that the output signals, issued for the first fault, correspond to a two-phase
trip for included phases. The output signals generated by the second fault must
correspond to the three-phase tripping action.
11.12.1.4 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 Disabled .
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- trip should occur and all trip outputs TR_A, TR_B, TR_C 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 = Enabled and repeat.
Besides the TRIP outputs, CLLKOUT should be set.
8. Reset the lockout signal by activating the reset lockout (RSTLKOUT) signal.
Section 11
1MRK 504 165-UUS -
Testing functionality by secondary injection
272 Transformer protection RET670 2.2 ANSI
Commissioning manual