Scheme Communication; Scheme Communication Logic For Distance Or Overcurrent Protection Zcpsch; Function Revision History; Testing Permissive Underreaching - Hitachi Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Values of the logical signals are available on the local HMI under Main menu /Tests /Function
status /Control /Apparatus control /Interlocking . The Signal Monitoring in PCM600 shows the
same signals that are available on the local HMI.
The interlocking function consists of a bay-level part and a station-level part. The interlocking is
delivery specific and is realized by bay-to-bay communication over the station bus. For that reason,
test the function in a system, that is, either in a complete delivery system as an acceptance test (FAT/
SAT) or as parts of that system.
11.11

Scheme communication

11.11.1 Scheme communication logic for distance or overcurrent
protection ZCPSCH
Prepare the IED for verification of settings as outlined in section
section
Check the scheme logic during the secondary injection test of the impedance or overcurrent
protection functions.
Activation of the different zones verifies that the CS signal is issued from the intended zones. The CS
signal from the independent tripping zone must have a tSendMin minimum time.
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.
11.11.1.1

Function revision history

Document
revision
B
C
D
E
F
G
H
J
K
L
M
11.11.1.2

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.
178
"Preparing for test" in this chapter.
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.
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"Requirements" and
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Commissioning manual
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