12.11.1.2
1ph/3ph operating mode
SEMOD54375-116 v4
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 outputs TRIP, TRLn and
TR1P should be active during the first fault. No other outputs should be active. Functional
outputs TRIP, all TRLn and TR3P should be active during second fault.
12.11.1.3
1ph/2ph/3ph operating mode
SEMOD54375-143 v4
In addition to other tests, the following tests, which depend on the complete configuration of
an IED, should be carried out.
Procedure
1.
Make sure that
AutoLock and TripLockout are both set to Off.
2.
Initiate different single-phase-to-earth faults one at a time.
Take an adequate time interval between faults into consideration, to overcome a reclaim
time, which is activated by the autorecloser function SMBRREC. Only a single-phase trip
1MRK 502 067-UEN B
Section 12
Testing functionality by secondary injection
221
Commissioning manual
