ABB RER670 - Checking of Unblocking Logic; Completing the Test; Testing Blocking Scheme; Current Reversal and Weak-End Infeed Logic for Distance Protection 2-Phase ZCRWPSCH

10.10.1.3 Testing blocking scheme
M13868-50 v5
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.
10.10.1.4 Checking of unblocking logic
M13868-72 v4
Check the unblocking function (if the function is required) when checking the
communication scheme.
Command function with continuous unblocking
M13868-76 v6
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.
10.10.1.5 Completing the test
M13868-84 v6
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.
10.10.2 Current reversal and Weak-end infeed logic for distance
protection 2-phase ZCRWPSCH
GUID-732B11C3-603F-4159-B46E-D4188EF71DA5 v1
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 155
Commissioning manual