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Section 6
Testing functionality
6.9.1.5
6.9.1.6
6.9.2
126
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.
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.
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 (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.
Completing the test
Continue to test another function or end the testing by setting the parameter TestMode
to Disabled under Main menu/Tests/IED test mode/1:TESTMODE. If another
function is tested, then set the parameter Blocked to No under Main menu/Tests/
Function test modes/Scheme communication/ZCPSCH(85)/1:ZCPSCH for the
function, or for each individual function in a chain, to be tested next. Remember to set
the parameter Blocked to Yes, for each individual function that has been tested.
Current reversal and WEI logic for distance protection 3-
phase ZCRWPSCH (85)
Prepare the IED for verification of settings as outlined in
verify
settings".
1MRK 506 331-UUS A
Unblock = 1 )
5.1 "Preparing the IED to
Commissioning Manual
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