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1MRK 511 366-UUS -
11.10.1.3
Commissioning manual
Consider using an adequate time interval between faults, to overcome a reset time,
which is activated by SMBRREC (79). A three-pole trip should occur for each
separate fault and all of the trips. Functional outputs TRIP, all TR_A, TR_B, TR_C
and TR3P should be active at each fault.
No other outputs should be active.
4.
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).
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 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.
Check that the second trip is a three-pole trip and that a three-phase autoreclosing
attempt is given after the three-phase dead time. Functional outputs TRIP, TR_A,
TR_B, TR_C and TR1P should be active during the 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.
1ph/2ph/3ph operating mode
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 Disabled.
2.
Initiate different single-phase-to-ground faults one at a time.
Take an adequate time interval between faults into consideration, to overcome a
reset time, which is activated by the autorecloser function SMBRREC (79). Only a
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.
Testing functionality by secondary injection
Section 11
155
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