ABB REL670 Installation And Commissioning Manual page 159

12.2.2
12.2.3
Scheme communication
Weak end infeed logic
WEI logic at permissive schemes
Procedure
1. Check the blocking of the echo with the injection of a CR signal
>40 ms after a reverse fault is applied.
2. Measure the duration of the echoed signal by applying a CR carrier
receive signal.
3. Check the trip functions and the voltage level for trip by reducing a
phase voltage and applying a CR carrier receive signal.
Testing conditions
Only one type of fault is sufficient, with PSCH function. Apply three faults (one in each phase),
when ZC1P function is used. For phase L1-N fault, set these parameters:
Table 21:
Phase I (Amps)
L1 0
L2 0
L3 0
Change all settings cyclically for other faults (L2-N and L3-N).
Weak end infeed set for trip
1. Apply input signals according
2. Activate the carrier receive (CR) signal of the terminal.
3. After the relay has operated, turn off the input signals.
4. Check that trip, carrier-send signal, and indication are obtained.
(note: a 200mS pulse)
Weak end infeed set for echo
1. Apply input signals according
2. Activate the carrier receive (CR) signal of the terminal.
3. After the relay has operated turn off the input signals.
4. Check that the carrier send signal is obtained.
Completing the test
Continue to test another function or end the test by changing the test mode setting to off.
Verifying settings by secondary
Phase-angle V (Volts)
(Deg)
0 Set less than UPN<
240 63
120 63
table 21.
table 21.
Chapter 11
injection
Phase-angle
(Deg)
0
240
120
151