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)
M12400-161 v10
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
M12400-173 v7
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.
Restoring equipment
M12400-190 v6
After the tests, restore the equipment to normal or desired state. Check the
following items in particular:
1. Check the operation counters.
Reset the counters to zero, if that is the user's preference. The counter reset
function is found on the local HMI under Main menu/Reset/Reset counters/
AutoRecloser79,5(0–>1)/SMBRREC(79,5(0–>1)):x
2. Restore settings that may have been modified for the tests back to normal.
3. Disconnect the test switch, circuit breaker simulating arrangement and test
circuits.
Reconnect any links or connection terminals, which may have been opened
for the tests.
4. Reset indications, alarms and disturbance recordings.
Clearing of the disturbance report can be done via the Disturbance Handling
in PCM600 or the local HMI.
Section 9 1MRK 506 383-UEN A
Testing functionality by secondary injection
146 Line distance protection REL650 2.2 IEC
Commissioning manual
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