Hitachi Relion 670 Series Commissioning Manual page 227

1MRK506371-UUS Rev. M
11.11.3 Current reversal and Weak-end infeed logic for distance
protection 3-phase ZCRWPSCH (85)
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
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 (85).
11.11.3.1 Function revision history
Document
revision
B
C
D
E
F
G
H
J
K
L
M
N
P
11.11.3.2 Current reversal logic
It is possible to check the delay of the CS send signal with tDelayRev by changing from a reverse to a
forward fault.
By continuously activating the CR input and changing from a reverse to a forward fault, the delay
tDelayRev can be checked.
Checking of current reversal
Line distance protection REL670
Commissioning manual
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 DOs for teleprotection permissive (TxPrm & RxPrm1) transmit and receive signals in
accordance with 61850 Ed 2.0
2.2.6 -
2.2.6 -
The reverse zone timer must not operate before the forward zone fault is applied. The user
might need to block the reverse zone timer setting during testing of current reversal.
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Testing functionality by secondary injection
"Requirements" and section
GUID-23BE6A6F-8D87-4CD9-952B-40EE65D7F04C v2
Section 11
M14947-2 v7
"Preparing
M14947-8 v3
M14947-13 v9
221