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1MRK 505 372-UEN Rev. K
1.
Check that the auto recloser is operative, for example by making a reclosing shot.
Keep the CBREADY signal high.
2.
Set the breaker simulating relay BR in Open position.
3.
Close the BR relay and immediately apply a fault and thereby a START signal.
4.
Check that no auto reclosing takes place.
Checking the influence of circuit breaker not ready for reclosing
1.
Check that the auto recloser function is operative, for example by making an auto reclosing
shot.
Keep the CB simulator BR closed. Remove the CBREADY signal by opening SRY.
2.
Apply a fault and thereby a START signal.
3.
Check that no auto reclosing takes place.
Checking the influence of synchrocheck (at three-phase reclosing)
1.
Check that the auto recloser is operative, for example, by making a three-phase reclosing shot
with the synchrocheck SESRSYN conditions fullfilled.
Set the SESRSYN function to Off to eliminate the signal connected to input signal SYNC.
2.
Apply a fault causing three-phase trip and thereby a START and a TR3P signal to the auto
recloser.
3.
Wait for the tSync time-out limit.
Check that no reclosing is made.
Checking the response when auto recloser is Off
Procedure
1.
Check that the auto recloser is operative, for example by making a reclosing shot.
Set the autoreclosing operation to Off, for example by external control.
The output READY shall be low, and PREP3P shall be high.
2.
Apply a single phase fault and thereby a START signal.
3.
Check that a definitive three phase trip and no auto reclosing takes place.
Testing auto reclosing in a multi-breaker arrangement
The usual arrangement is to have an auto recloser per circuit-breaker. They can be in different circuit
breaker related IEDs or in a common IED.
•
A master auto recloser is set with Priority = High.
•
A slave auto recloser is set with Priority = Low.
The two auto reclosers can be checked individually by carefully applying START , WAIT, and INHIBIT
signals.
It is also possible to verify the two functions together by using circuit breaker simulating equipment
for two circuit breaker circuits. There should be interconnections from the master to the slave
function, WFMASTER- WAIT, and UNSUCCL - INHIBIT, as shown in the illustration referred to
above.
Restoring equipment
After the tests, restore the equipment to normal or desired state. Check the following items in
particular:
1.
Check the operation counters.
Busbar protection REB670
Commissioning manual
See the application manual for an illustration of typical interconnections.
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Section 10
Testing functionality by secondary injection
M12400-161 v10
M12400-149 v5
M12400-173 v7
M12400-185 v7
M12400-190 v6
129
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