Areva MiCOM P441, Technical Manual

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Application Notes P44x/EN AP/E33
MiCOM P441/P442 & P444 Page 125/220
P0496ENa
External Check Sync
Closing command
with external C. Sync
conditions verified
1
Output_AR_force_Sync
&
Output_closing order
FIGURE 74 - LOGIC WITH EXTERNAL SYNCHRO CHECK
P0497ENa
External
AR close order
1
Output_AR_force_Sync
&
Output_Sync
External closing order
with internal C. Sync
conditions verified
1
Output_closing order
Output_AR_Close
FIGURE 75 - LOGIC WITH EXTERNAL AR
4.5 Autorecloser
4.5.1 Autorecloser Functional Description
The relay autorecloser provides selectable multishot reclosure of the line circuit breaker.
The standard scheme logic is configured to permit control of one circuit breaker.
Autoreclosure of two circuit breakers in a 1½ circuit breaker or mesh corner scheme is not
supported by the standard logic (Dedicated PSL must be created & tested by user). The
autorecloser can be adjusted to perform a single shot, two shot, three shot or four shot cycle.
Dead times for all shots (reclose attempts) are independently adjustable (in MiCOM S1).
Where the relay is configured for single and three pole tripping, the recloser can perform a
high speed (HSAR) single pole reclose shot, for a single phase to earth fault. This single
pole shot may be followed by up to three delayed (DAR) autoreclose shots, each with three
phase tripping and reclosure. For a three pole trip, up to four reclose shots are available in
the same scheme. Where the relay is configured for three pole tripping only, up to four
reclose shots are available, each performing three phase reclosure.