1Ph/3Ph Operating Mode - ABB RET670 Commissioning Manual

1MRK 504 165-UEN A
11.12.1.2
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
function. The following functional output signals must always appear
simultaneously: TRIP, TRL1, TRL2, TRL3 and TR3P.

1ph/3ph operating mode

In addition to various other tests, the following tests should be performed. They
depend on the complete configuration of an IED:
Procedure
1. Make sure that TripLockout and AutoLock are both set to Off.
2. Initiate different single-phase-to-earth faults one at a time.
Single-phase tripping will only be allowed when an autoreclose attempt will
follow. The autorecloser function SMBRREC has the functionality such as
the long trip time, CB ready and so on, which can prevent a proper single-
phase tripping and autoreclose. To by-pass this problem the fault initiation
should be with a test set and with the autoreclose in full service with a test set
connected to the distance protection function. Consider using an adequate
time interval between faults, to overcome a reclaim time of which is activated
by SMBRREC. Only a single-phase trip should occur for each separate fault
and only one of the trip outputs (TRLn) should be activated at a time.
Functional outputs TRIP and TR1P should be active during each fault. No
other outputs should be active.
3. Initiate different phase-to-phase and three-phase faults.
Consider using an adequate time interval between faults, to overcome a
reclaim time, which is activated by SMBRREC. A three-phase trip should
occur for each separate fault and all of the trips. Functional outputs TRIP, all
TRLn and TR3P should be active at each fault.
No other outputs should be active.
4. Initiate a single phase-to-earth fault and switch it off immediately when the
trip signal is issued for the corresponding phase. Initiate the same fault once
again within the reclaim time of the used SMBRREC.
A single-phase fault shall be given at the first fault. A three-phase trip must
be initiated for the second fault. Check that the corresponding trip signals
appear after both faults. Functional outputs TRIP, TRLn and TR1P should be
active during first fault. No other outputs should be active. Functional outputs
TRIP, all TRLn and TR3P should be active during second fault.
5. Initiate a single phase-to-earth fault and switch it off immediately when the
trip signal is issued for the corresponding phase. Initiate the second single
phase-to-earth 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, when included in the protection scheme.
Check that the second trip is a three-phase trip and that a three-phase
autoreclosing attempt is given after the three-phase dead time. Functional
Section 11
SEMOD54375-116 v5
259