ABB RED670 Commissioning Manual page 142

Section 11
Testing functionality by secondary injection
11.4.10.2 Testing the carrier send and trip signals
Procedure
1. Set the operation of all distance zones, which are supposed to be blocked by the operation of
ZMRPSB (78), to Disabled.
2. Configure the PUPSD functional inputs to the TRIP output of the underreaching power-swing zone,
if the underreaching communication scheme is used.
3. Start instantaneously any kind of fault within the underreaching power-swing zone and check, that:
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4. Simulate the receiving of the carrier signal so that the functional input signal CR becomes a logical
one.
5. Configure the PUPSD input to connect to the output PICKUP of the carrier accelerating zone
(Power-swing overreaching zone).
6. Initiate any kind of fault within the carrier accelerating zone and check that the TRIP signal appears
after the time, which is equal to the time delay set on the trip timer tTrip.
Also consider the (average) trip time of the carrier acceleration zone (approximately 30ms).
11.4.10.3 Testing the influence of the residual overcurrent protection
Additionally connect the IED according to the test instructions for the four step residual overcurrent
protection function EF4PTOC (51N/67N), if the Power swing logic (PSLPSCH) is configured in a way that
is controlled by this protection.
Procedure
1. Initiate a single phase-to-ground fault within both power-swing zones.
Make sure that none of CS or TRIP output signals appear after the time delays tCS and tTrip.
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
Procedure
136
The CS signal appears after the time delay, which is equal to the sum of set time delays for
the underreaching zone tnPP or tnPG (dependent on the type of fault) and for the carrier
send security timer tCS. Also add the usual trip time for the underreaching zone
(approximately 30ms).
The TRIP signal appears after the time delay, which is equal to the sum of set time delays for
the underreaching zone tnPP or tnPG (dependent on the type of fault) and for the trip security
timer tTrip. Also add the usual operate time for the underreaching zone (approximately
30ms).
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1MRK 505 378-UUS Rev. J
Line differential protection RED670
Commissioning manual
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