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Section 11
Testing functionality by secondary injection
Document
revision
D
E
F
G
H
J
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, to Off.
2.
Configure the STPSD 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:
•
•
4.
Simulate the receiving of the carrier signal so that the functional input signal CR becomes a
logical one.
5.
Configure the STPSD input to connect to the output START 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) operate 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, if the Power swing logic (PSLPSCH) is configured in a way that is
controlled by this protection.
Procedure
1.
Initiate a single phase-to-earth 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-earth fault within the reach of zone 1 and both power-swing zones.
130
Product
History
revision
2.2.3
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2.2.3
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2.2.4
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2.2.4
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2.2.4
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2.2.5
Deleted DO Rx
The CS signal appears after the time delay, which is equal to the sum of set time delays
for the underreaching zone tnPP or tnPE (dependent on the type of fault) and for the
carrier send security timer tCS. Also add the usual operate 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 tnPE (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-UEN Rev. K
Line differential protection RED670
Commissioning manual
M14946-8 v3
M14946-28 v5
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