Current Reversal Logic; Weak End Infeed Logic - ABB RER670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.10.2.1
10.10.2.2
156
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.

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
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.
The forward zone timer must be set longer than the tDelayRev set
value.
1. Set the condition to an impedance at 50% of the reach of the reverse zone
connected to IRV.
2. Activate the receive (CRL) signal.
3. After the start condition is obtained for reverse zone, apply a fault at 50% of
the reach of the forward zone connected to IRVBLK.
4. Check that correct trip outputs and external signals are obtained for the type
of fault generated. The operation time should be about the tDelayRev setting
longer than the carrier accelerated trip (TRIP) recorded for the permissive
overreach scheme communication.
5. Restore the forward and reverse zone timer to its original setting.

Weak end infeed logic

Weak-end infeed logic at permissive overreach schemes
1MRK 506 377-UEN C
Railway application RER670 2.2 IEC
Commissioning manual
M14947-8 v3
M14947-13 v9
M14947-37 v2
M14947-39 v5