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1MRK 505 378-UEN Rev. K
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
Procedure
1.
Set the operation of all normal distance protection zones to On.
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 operate time, which must be equal to the operate time of zone 1, after the
measured impedance enters its operate area.
No delayed operation of zone 1 must be observed.
6.
Configure the STPSD functional input to connect to the START 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 operate 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
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.4.11
Pole slip protection PSPPPAM
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
11.4.11.1
Verifying the settings
It is assumed that setting of the pole slip protection function PSPPPAM is done according to
impedances as seen in figure
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
voltage and current amplitude and the angle between the injected voltage and current. The
parameter setting shall be according to the real application chosen values.
Procedure
1.
Feed the IED with current and voltage corresponding to a normal operation point
Injected voltage U equal to base voltage (UBase) and the injected current I equal to half the
base current (IBase). The angle between the voltage and current shall be 0°.
2.
With maintained amplitude of the injected voltage the current amplitude and angle is changed
to a value ZC/2.
Line differential protection RED670
Commissioning manual
in this chapter.
39
and figure 40.
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Testing functionality by secondary injection
"Requirements"
and section
Section 11
M14946-49 v3
M14946-70 v2
SEMOD175096-3 v2
SEMOD175096-7 v3
131
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