BLKZMUR must appear together with the fault and must remain active until the fault has been
switched off plus the time delay, as set on the tBlkTr timer.
2. Initiate a phase-to-phase fault within the operating area of both power-swing zones.
Make sure that CS and TRIP output signals appear after the time delays tCS.
3. Switch the operation of the zone 1 distance protection function on and fulfill all the conditions for
single-pole autoreclosing.
4. Simulate a single phase-to-ground fault within the reach of zone 1 and both power-swing zones.
The fault should cause a single-pole tripping with the normal operating time of zone 1.
5. Repeat the fault within the dead time of single-pole autoreclosing.
Make sure, that PSLPSCH generates a BLKZMUR signal and no CS and TRIP.
11.4.10.4 Checking the underreaching zone
M14946-49 v3
Procedure
1. Set the operation of all normal distance protection zones to Enabled.
2. Simulate a fault without fault resistance in the middle of distance protection zone 1.
Make sure that the trip appears within the operate time for the distance protection zone 1 and no
BLKZMOR output signal appears.
3. Switch off the fault and prepare a new fault without fault resistance within the normal distance
protection zone 2 operate area, but outside the zone 1 operate area.
4. Switch on the fault and move it into the zone 1 operate area with a time delay longer than the time
set on the tDZ timer and faster than the time set on timer tZL.
5. Observe the trip time, which must be equal to the trip time of zone 1, after the measured
impedance enters its operate area.
No delayed operation of zone 1 must be observed.
6. Configure the PUPSD functional input to connect to the PICKUP functional output and repeat the
previous fault.
Fast trip, caused by the operation of zone 1 must appear with a time delay, which is equal to the set
time delay on the timer tZL plus zone 1 normal otrip time. Also, observe the BLKZMOR functional
output signal, which must appear for a short time.
7. Be sure to establish the original configuration of the IED and the original settings of all setting
parameters.
11.4.10.5 Completing the test
M14946-70 v2
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.4.11 Pole slip protection PSPPPAM (78)
SEMOD175096-3 v2
Prepare the IED for verification of settings as outlined in section
"Requirements" and section "Preparing
for test" in this chapter.
11.4.11.1 Verifying the settings
SEMOD175096-7 v3
It is assumed that setting of the pole slip protection function PSPPPAM (78) is done according to
impedances as seen in figure
41 and figure 42.
The test is done by means of injection of three-phase current and three-phase voltage from a modern
test device. This test device shall be able to give voltage and current with the possibility to change
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 141
Commissioning manual
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