Chapter 6. Description of Operation of Protection Subsystem
6-19
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
6.6.5
Definite Trip
A
Definitive Trip
signal will be generated in the Recloser if, after the reclosing attempt
sequence the fault persists. Then, the trip will occur.
It is possible too to configure an auxiliary output (
DD + DISP*BLQ
), also as a definitive trip; so
that when a trip occurs the Recloser will get internally blocked.
This
Definitive Trip
signal will remain active as long as the unit performing that trip does not
reset. It usually happens when after a trip no reclosing attempt takes place.
6.6.6
Recloser Not in Service
The Recloser is placed in the
Not in Service
state whenever the
Recloser in Service Enable
setting is
NO
.
6.6.7
Reclose Counter
There are two counters accessible from the operator interface display, which indicate the
number of reclose attempts completed. One counter records the number of reclose attempts
after the Recloser at rest trip, and the second counts the number of reclose attempts of the rest
of the cycle trips.
For example, where the number of reclose attempts is set to four, and a fault has been
successfully cleared after the fourth trip, the first counter is incremented one count and the
second counter incremented three counts. The counters are reset from the operator interface.
6.6.8
Recloser and Trip Control Masks
The Reclose Sequence Trip Mask controls which protective elements can operate based on
Recloser status, and the Reclose Sequence Reclose Mask controls which protective elements
can initiate reclosing after operating.
Trip Enable
Tripping can be controlled by Recloser status for the following elements:
7IRD-A Model
7IRD-J Model
Phase Instantaneous
Phase 1 Instantaneous
Phase Time
Phase Time
Ground Instantaneous
Ground 1 Instantaneous
Ground Time
Ground Time
Open Phase
Phase 2 Instantaneous
Residual Current
Ground 2 Instantaneous
Open Phase
Residual Current
