Checking Of Unblocking Logic; Completing The Test; Phase Segregated Scheme Communication Logic For Distance Or Overcurrent Protection Zc1Ppsch; Testing Permissive Underreaching - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UEN E
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. Check that for a forward fault, carrier send (CS) signal is first obtained from the delta
based fault inception detection (as it is not directional) , and immediately inhibited by
the forward zone.
7. Activate the IED receive (CR) signal.
8. Apply a fault condition in the forward directed zone used for scheme communication
tripping.
9. Check that the no trip from scheme communication occurs.
10. 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.
11.11.1.5

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.
11.11.1.6

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.
11.11.2 Phase segregated scheme communication logic for distance or
overcurrent protection ZC1PPSCH
Prepare the IED for verification of settings outlined in Section
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
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.
11.11.2.1

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.
Transformer protection RET670
Commissioning manual
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Testing functionality by secondary injection
Unblock = 1 )
TESTMODE setting to Off .
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"Preparing the IED to verify
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Section 11
M13868-72 v4
M13868-76 v6
M13868-84 v6
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