Current Reversal Logic; Weak End Infeed Logic - ABB Relion 650 Series Commissioning Manual

1MRK 505 395-UEN C
9.10.2.1

Current reversal logic

It is possible to check the delay of the CS send signal with
reverse to a forward fault.
By continuously activating the CR input and changing from a reverse to a forward fault, the
tDelayRev can be checked.
delay
Checking of current reversal
1. Set the healthy 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 WEIBLK2.
4. Check that correct trip outputs and external signals are obtained for the type of fault
generated. The operation time should be about the
carrier accelerated trip (TRIP) recorded for the permissive overreach scheme
communication.
5. Restore the forward and reverse zone timer to its original setting.
9.10.2.2

Weak end infeed logic

Weak-end infeed logic at permissive overreach schemes
1. Check the blocking of the echo with the injection of a CRL signal >40ms after a reverse
fault is applied.
2. Measure the duration of the echoed CS signal by applying a CRL receive signal.
3. Check the trip functions and the voltage level for trip by reducing a phase voltage and
applying a CRL receive signal.
Testing conditions
Only one type of fault is sufficient, with the current reversal and weak-end infeed logic for
distance protection function ZCRWPSCH. Apply three faults (one in each phase). For phase L1-
N fault, set these parameters:
Table 19:
Phase
L1
L2
L3
Line differential protection RED650
Commissioning manual
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
Phase L1-N parameter values
I (Amps) Phase-angle
(Deg)
0
0
0
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V (Volts)
0 Set less than
240 63
120 63
Testing functionality by secondary injection
tDelayRev by changing from a
tDelayRev set value.
tDelayRev setting longer than the
Phase-angle
(Deg)
UPN<
0
240
120
Section 9
M14947-8 v3
M14947-13 v9
M14947-37 v2
M14947-39 v5
M14947-52 v7
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