Completing The Test; Phase Segregated Scheme Communication Logic For Distance Or Overcurrent Protection Zc1Ppsch; Testing Permissive Underreaching - ABB RET670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.11.1.6
11.11.2
11.11.2.1
250
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.
Phase segregated scheme communication logic for
distance or overcurrent protection ZC1PPSCH
Prepare the IED for verification of settings outlined in Section
to verify settings".
Check the scheme logic during the secondary injection test of the impedance
protection functions.
Activating of the different zones and phases verifies that the CSLx signal are issued
from the intended zones. The CSLx signal from the independent tripping zone must
have a tSendMin minimum time.
Check the tripping function by activating the CRLx inputs with the overreaching
zone used to achieve the CACCLx signals.
It is sufficient to activate the zones with all types of fault with the secondary
injection.

Testing permissive underreaching

1. Activate the receive (CRLx) signal in the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the permissive zone.
4. Check that correct trip outputs, external signals, and indications are obtained
for all the actual types of fault generated.
5. Check that other zones operate according to their zone timers and that the
send (CSLx) signal is obtained only for the zone and phase configured to
generate the actual signal.
6. Deactivate the receive (CRLx) signal in the IED.
7. Check that the trip time complies with the zone timers and that correct trip
outputs, external signals, and indications are obtained for the actual type of
fault generated.
1MRK 504 165-UEN A
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"Preparing the IED
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Transformer protection RET670 2.2 IEC
Commissioning manual
M13868-76 v6
M13868-84 v6