ABB Relion 670 Series Commissioning Manual page 140

Section 11
Testing functionality by secondary injection
11.4.10.2 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
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
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
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.
11.4.10.3 Checking the underreaching zone
Procedure
1. Set the operation of all normal distance protection zones to
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
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
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
continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
134
tDZ timer and faster than the time set on timer tZL .
tZL plus zone 1 normal otrip time. Also, observe the BLKZMOR
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tBlkTr timer.
tCS .
Enabled .
TESTMODE setting to Disabled .
Line distance protection REL670
Commissioning manual
1MRK 506 371-UUS E
M14946-28 v5
tCS and tTrip .
M14946-49 v3
M14946-70 v2