Checking Of Unblocking Logic; Completing The Test; Current Reversal And Wei Logic For Distance Protection 3-Phase Zcrwpsch; Current Reversal Logic - ABB Relion 650 Series Commissioning Manual

1MRK 506 336-UEN B
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.
7.9.1.5

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.
7.9.1.6

Completing the test

Continue to test another function or end the testing by setting the parameter
under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then set
the parameter
communication/ZCPSCH(85)/ZCPSCH:1 for the function, or for each individual function in a
chain, to be tested next. Remember to set the parameter
function that has been tested.
7.9.2 Current reversal and WEI logic for distance protection 3-phase
ZCRWPSCH
Prepare the IED for verification of settings as outlined in section
settings.
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 the same 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.
7.9.2.1

Current reversal logic

It is possible to check the delay of the CS send signal with
reverse to a forward fault.
By continuously activating the CR input and changing from a reverse to a forward fault, the
tDelayRev can be checked.
delay
Line distance protection REL650
Commissioning manual
Blocked to No under Main menu/Tests/Function test modes/Scheme
© Copyright 2013 ABB. All rights reserved
Unblock = 1 )
Blocked to Yes , for each individual
Preparing the IED to verify
tDelayRev by changing from a
Section 7
Testing functionality
M13868-72 v4
M13868-76 v5
M13868-84 v6
TestMode to Off
M14947-2 v5.1.1
M14947-8 v3
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