Checking Of Unblocking Logic; Completing The Test; Current Reversal And Weak-End Infeed Logic For Distance Protection 3-Phase Zcrwpsch (85); Function Revision History - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UUS Rev. K
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.
11.11.1.6

Checking of unblocking logic

Check the unblocking function (if the function is required) when checking the communication scheme.
Command function with continuous unblocking (Unblock = 1)
Procedure
1. Activate the guard input signal (CR_GUARD) of the IED.
2. Using the scheme selected, check that a signal accelerated trip (TRIP) is obtained when the guard
signal is deactivated.
11.11.1.7

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.11.2 Current reversal and Weak-end infeed logic for distance
protection 3-phase ZCRWPSCH (85)
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
Values of the logical signals for ZCRWPSCH are available on the local HMI under Main menu/Tests/
Function status / Scheme communication / ZCRWPSCH(85) /ZCRWPSCH:1.
The Signal Monitoring in PCM600 shows signals that are available on the Local HMI.
The current reversal logic and the weak-end infeed functions are tested during the secondary-injection
test of the impedance or overcurrent protection zones together with the scheme communication logic for
the distance protection function ZCPSCH (85).
11.11.2.1

Function revision history

Document
revision
B
C
D
E
Table continues on next page
Bay control REC670
Commissioning manual
Product History
revision
2.2.1 -
2.2.2 -
2.2.2
2.2.2 -
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Testing functionality by secondary injection
"Requirements" and section
GUID-23BE6A6F-8D87-4CD9-952B-40EE65D7F04C v1
Section 11
M13868-72 v4
M13868-76 v6
M13868-84 v6
M14947-2 v7
"Preparing
189