Weak End Infeed Logic; Completing The Test - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
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.
11.10.2.2

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 23:
Phase
L1
L2
L3
If wanted, change all settings cyclically for other faults (L2-N and L3-N).
The setting parameter
1. Apply input signals according Table 23.
2. Activate the receive (CR) signal.
3. After the IED has operated, turn off the input signals.
4. Check that trip, send signal, and indication are obtained.
11.10.2.3

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
166
Phase L1-N parameter values
I (Amps) Phase-angle
(Deg)
0
0
0
WEI is set to Echo & Trip .
The ECHO output gives only a 200 ms pulse.
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V (Volts)
0 Set less than
240 63
120 63
1MRK 511 403-UEN E
tDelayRev setting longer than the
Phase-angle
(Deg)
UPN<
0
240
120
TESTMODE setting to Off .
Bay control REC670
Commissioning manual
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