Per Element Reclose Time

There are normally separate Reclose Time settings associated with Trip 1, Trip 2 and Trip 3, depending on the global Trips to Lockout setting. The ACR will automatically reclose after a trip that occurs during an automatic reclose sequence according to the reclose time configured for that trip. This is regardless of the protection element that actually caused the trip.

The controller uses trip counters to determine when the applicable Trips to Lockout setting has been reached and the device must go to lockout. There are separate trip counters for:

• Phase Fault and EF protection

• SEF protection

• NPS protection

When Per Element Reclose Time On is selected, individual reclose times can be configured for Phase and Earth protection elements for trips up to trip (Trips to Lockout -1) that is if global Trips to Lockout = 4, Trips 1, 2, and 3 can be configured. SEF and NPS elements can also be configured for individual reclose times for the same trips providing their individual Trips to Lockout settings are > 1.

The table below shows which per element trips can be configured with a Reclose Time when:

• Trips to Lockout = 4

• SEF Trips to Lockout = 1

• NPS Trips to Lockout =1

When:

• Trips to Lockout = 3

• SEF Trips to Lockout = 2

• NPS Trips to Lockout = 1

The elements indicated in the table below can be configured with individual reclose times.

Per Element Reclose Times can be configured in WSOS with the individual element protection settings for each trip as shown below for Trip 1.

When Per Element Reclose Times are on, all applicable reclose times can be configured on the operator interface.