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Section 11
Testing functionality by secondary injection
Check the tripping function by activating the CR and CRG inputs with the overreaching zone used to
achieve the CACC signal.
It is sufficient to activate the zones with only one type of fault with the secondary injection.
11.12.1.1
Function revision history
Document
revision
B
C
D
E
F
G
H
J
K
L
M
11.12.1.2
Testing permissive underreaching
1.
Activate the receive (CR) signal in the IED.
2.
Apply healthy normal load conditions to the IED for at least two seconds.
3.
Apply a fault condition within the permissive zone.
4.
Check that correct trip outputs, external signals, and indications are obtained for the actual type
of fault generated.
5.
Check that other zones operate according to their zone timers and that the send (CS) signal is
obtained only for the zone configured to generate the actual signal.
6.
Deactivate the receive (CR) signal in the IED.
7.
Check that the 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.
11.12.1.3
Testing permissive overreaching
1.
Activate the receive (CR) signal in the IED.
2.
Apply healthy normal load conditions to the IED for at least two seconds.
3.
Apply a fault condition within the permissive zone.
4.
Check that correct trip outputs, external signals, and indication are obtained for the actual type
of fault generated.
5.
Check that the other zones operate according to their zone timer and that the send (CS) signal
is obtained only for the zones that are configured to give the actual signal. Also the zone
connected to CS underreach is giving CS in this mode.
6.
Deactivate the IED receive (CR) 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.
250
Product
History
revision
2.2.1
-
2.2.2
-
2.2.2
2.2.2
-
2.2.3
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
-
2.2.4
2.2.5
Added separate DOs for teleprotection permissive (TxPrm & RxPrm1), blocking (TxBlk &
RxBlk1) and direct trip (TxTr & RxTr1) transmit and receive signals in accordance with
61850 Ed 2.0.
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 504 165-UEN Rev. K
GUID-E8271DE5-A605-432C-8608-F8DEEF97D4F0 v1
M13868-10 v4
M13868-28 v4
Transformer protection RET670
Commissioning manual
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