For example:
If I>1 AR is set to Initiate Main AR, operation of the I>1 protection stage will initiate Autor
eclose
If ISEF>1 AR is set to No Action, operation of the ISEF>1 protection stage will lead to a CB trip but no reclose.
Otherwise it can be used to initiate Main autoreclose or SEF autoreclose.
Note:
A selection must be made for each protection stage that is enabled.
A separate protection device may also initiate Autoreclose. The Autoreclose can be initiated from a protection Trip,
or when sequence coordination is required from a protection Start. If external triggering of Autoreclose is required,
the following DDB signals should be mapped to opto-inputs:
● Ext AR Prot Trip
● Ext AR Prot Strt (if applicable)
In addition, the setting Ext Prot should be set to Initiate Main AR.
Although a protection start and a protection trip can initiate an AR cycle, several checks still have to be performed
before the initialisation signal is given. Some of the checks are listed below:
● Auto Mode has been selected
● Live line mode is disabled
● The number of main protection and SEF shots have not been reached
● Sequence co-ordination is enabled (for protection start to initiate AR. This is not necessary if a protection
trip is doing the initiating)
● The CB Ops Lockout DDB signal is not set
● The CB in Service DDB signal is high
Note:
The relevant protection trip must be mapped to the Trip Command In DDB.
Chapter 13 - Autoreclose P14x
290 P14xEd1-TM-EN-1
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