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1MRK 504 165-UEN Rev. K
4.
Check that correct trip outputs, external signals, and indication are obtained for the all actual
types of fault generated.
5.
Check that the other zones operate according to their zone timer and that the send (CSLx)
signal is obtained only for the zones and phases that are configured to give the actual signal.
Also the zone connected to CSLx underreach is giving CSLx in this mode.
6.
Deactivate the IED receive (CRLx) signal.
7.
Apply healthy normal load conditions to the IED for at least two seconds.
8.
Apply a fault condition within the permissive zone.
9.
Check that trip time complies with the zone timers and that correct trip outputs, external
signals, and indications are obtained for the actual type of fault generated.
11.12.2.4
Testing blocking scheme
1.
Deactivate the receive (CRLx) signal of the IED.
2.
Apply healthy normal load conditions to the IED for at least two seconds.
3.
Apply a fault condition within the forward directed zone used for scheme communication
tripping.
4.
Check that correct trip outputs and external signals are obtained for the type of fault generated
and that the operate time complies with the tCoord timer (plus relay measuring time).
5.
Check that the other zones operate according to their zone times and that a send (CSLx) signal
is only obtained for the reverse zone.
6.
Activate the IED receive (CRLx) signal.
7.
Apply a fault condition in the forward directed zone used for scheme communication tripping.
8.
Check that the no trip from scheme communication occurs.
9.
Check that the trip time from the forward directed zone used for scheme communication
tripping complies with the zone timer and that correct trip outputs, external signals, and
indications are obtained for the actual type of fault generated.
11.12.2.5
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.
11.12.3
Current reversal and Weak-end infeed logic for distance
protection 3-phase ZCRWPSCH
Prepare the IED for verification of settings as outlined in section
section
Values of the logical signals for ZCRWPSCH are available on the local HMI under Main menu/Tests/
Function status / Scheme communication / ZCRWPSCH(85) /ZCRWPSCH:1.
The Signal Monitoring in PCM600 shows signals that are available on the Local HMI.
The current reversal logic and the weak-end infeed functions are tested during the secondary-
injection test of the impedance or overcurrent protection zones together with the scheme
communication logic for the distance protection function ZCPSCH.
Transformer protection RET670
Commissioning manual
"Preparing for test"
in this chapter.
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
GUID-4FAA2F15-BB34-456D-A7F2-E79245371CBD v1
"Requirements"
and
Section 11
M13868-84 v6
M14947-2 v7
253
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