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Control Chapter 11
Verifying settings by secondary
injection
11.2.4 Checking the reclosing conditions
When checking the influence of a releasing condition it is suggested to first run a sequence with
the condition fulfilled. When the condition signal is removed, and a new sequence is run, it in-
dicates that the result was due to the changed condition. In case of a blocking signal the proce-
dure should be similar. Start without the blocking or inhibit signal, and then run a sequence with
the blocking or inhibit signal added.
Checking the influence of the INHIBIT signal
Procedure
1. Check that the auto-reclosing function is operative, e.g. by making a
reclosing shot without the INHIBIT signal.
2. Apply a fault and thereby a START signal. At the same time, or during
the open time, apply a signal to the input INHIBIT.
3. Check that the reclosing sequence is interrupted and no reclosing
takes place.
Check closing onto a fault
Procedure
1. Check that the reclosing function is operative, e.g. by making a re-
closing shot.
Keep the CBREADY signal high.
2. Set the breaker simulating relay BR in Open position.
3. Close the BR relay and apply immediately a fault and thereby a
START signal.
4. Check that no reclosing takes place.
Checking the influence of CB not ready for reclosing
Procedure
1. Check that the auto-reclosing function is operative, e.g. by making a
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 reclosing takes place.
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