Woodward suggest to remove the “Run” or “Permissive” input after a successful breaker closure has
been re-ceived and have the “Run” or “Permissive” input reclosed if the breaker opens and it is safe to
Reclose Limit Alarm
When the Reclose limit alarm (parameter 7556) is “Enabled” an independent monitor counts in the background
the number of close attempts. When the number of close attempts matches the configurable number of closing at-
tempts (parameter 3418) an alarm flag will be issued. This alarm flag is automatically considered when a dead
busbar closure is executed. When during the dead busbar closure, the reclose limit alarm becomes active, the
dead busbar closure permission will be passed to another DSLC-2. If the Reclose limit alarm (parameter 7556) is
“Disabled”, the DSLC-2 will have an infinite number of attempts to close the breaker.
Synchronizer Timer
The synchronizer function is equipped with three adjustable timers.
1. The CB close hold time (parameter 3416) determines the amount of time the control maintains the
breaker close command.
2. The Synchronizer timeout (parameter 3063) when the Synchronizer timeout alarm (parameter 7557) is
“Enabled”. The alarm is removable by de-energized run and permissive signal.
3. The Reclose delay (parameter 4534) which is the time delay between the single close commands.
When “Enabled” the synchronizer timer starts when the “Run” switch is closed. It is not active in the check or
permissive modes. If no breaker closure is received by the end of the timer, a synchronizer timeout alarm is re-
ceived and the DSLC-2 will stop the synchronizing process. If the “Run” input is removed, the alarm is reset and
when the “Run” input is closed the synchronizer process will be active.
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