Automatic Reclose Sequence

An ACR with an PowerLogic ADVC Controller configured for 4 Trips to Lockout can reclose up to three times to restore supply. If the fault is still present after the third trip/reclose sequence, the circuit breaker will trip and go to Lockout. When the ACR is in lockout it can no longer close automatically. It can still be closed manually, either locally or remotely.

The Trips to Lockout setting can be configured for 1...4. So if Trips to Lockout = 2, only one automatic reclose will be attempted and if the fault is still present the device will go to lockout after the second trip.

An automatic reclose sequence starts with a protection trip (trip 1). If the fault is permanent, the sequence will end when the device goes through its configured number of trips to lockout.

If the fault clears before the Trips to Lockout setting is reached, the circuit breaker will stay closed after the next reclose and start the Sequence Reset Timer.

The Sequence Reset Timer is a configurable setting and can be between 3 s and 180 s.

Once the set time expires, the sequence is reset and any subsequent fault will cause the first trip in a new sequence. If however the fault returns before the Sequence Reset Timer expires and it causes a protection trip, that trip will be the next one in the same sequence that is Trip 2, 3, or 4.

Another situation that can occur is if no fault is present when an automatic reclose occurs but comes back before the Sequence Reset Timer expires. This will reset the sequence reset time to zero and start the trip timer.

Yet another situation can occur where the switchgear automatically closes onto a fault that clears before a trip occurs. In this case the Fault Reset will start the Sequence Reset Timer which will reset the sequence if it expires.