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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-earth 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.
11.4.10.3
Checking the underreaching zone
M14946-49 v3
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.
11.4.10.4
Completing the test
M14946-70 v2
Continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore connections and settings to their original values, if they were
changed for testing purposes.
Section 11
1MRK 505 378-UEN A
Testing functionality by secondary injection
146
Line differential protection RED670 2.2 IEC
Commissioning manual
Summary of Contents for RED670 Relion 670 series
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