Testing Blocking Scheme; Checking Of Unblocking Logic; Completing The Test; Current Reversal And Weak-End Infeed Logic For Distance Protection 2-Phase Zcrwpsch - ABB RER670 Commissioning Manual

1MRK 506 377-UEN C
10.10.1.3
10.10.1.4
10.10.1.5
10.10.2
Railway application RER670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection

Testing blocking scheme

1. Deactivate the receive (CR) signal of the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the forward directed zone used for scheme
communication tripping.
4. Check that correct trip outputs and external signals are obtained for the type
of fault generated and that the operate time complies with the tCoord timer
(plus relay measuring time).
5. Check that the other zones operate according to their zone times and that a
send (CS) signal is only obtained for the reverse zone.
6. Activate the IED receive (CR) signal.
7. Apply a fault condition in the forward directed zone used for scheme
communication tripping.
8. Check that the no trip from scheme communication occurs.
9. Check that the trip time from the forward directed zone used for scheme
communication tripping complies with the zone timer and that correct trip
outputs, external signals, and indications are obtained for the actual type of
fault generated.

Checking of unblocking logic

Check the unblocking function (if the function is required) when checking the
communication scheme.
Command function with continuous unblocking
Procedure
1. Activate the guard input signal (CRG) of the IED.
2. Using the scheme selected, check that a signal accelerated trip (TRIP) is
obtained when the guard signal is deactivated.

Completing the test

continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
Current reversal and Weak-end infeed logic for distance
protection 2-phase ZCRWPSCH
Prepare the IED for verification of settings outlined in Section
to verify settings".
Section 10
M13868-50 v5
M13868-72 v4
M13868-76 v6
M13868-84 v6
GUID-732B11C3-603F-4159-B46E-D4188EF71DA5 v1
"Preparing the IED
155