2.15 Automatic Reclosure Function (optional)
307
7SD5 Manual
C53000-G1176-C169-1
Under address 3459 1.AR: CB? CLOSE it can be determined whether the readiness
of the circuit breaker ("circuit breaker ready") is interrogated before this first reclosure.
With the setting YES, the dead time may be extended if the circuit breaker is not ready
for a CLOSE–TRIP–cycle when the dead time expires. The maximum extension that
is possible is the circuit breaker monitoring time; this time was set for all reclosure
cycles under address 3409 CB TIME OUT (see above). Details about the circuit
breaker monitoring can be found in the function description, Section 2.15, at margin
heading „Interrogation of the Circuit Breaker Ready State“.
If there is a danger of stability problems in the network during a three-pole reclosure
cycle, you should set address 3460 1.AR SynRequest to YES. In this case, a check
is made before every reclosure following three-phase tripping to verify that voltages
from feeder and busbar are synchronized sufficiently. This is only done on condition
that either the internal synchronism and voltage check functions are available, or that
an external device is available for synchronism check. If only single-pole reclose
cycles are executed or no stability problems are expected during three-pole dead
times (e.g. due to closely meshed networks or in radial networks), set address 3460
to NO.
2nd to 4th Reclo-
sure Cycle
If several cycles have been set in the configuration of the scope of protection func-
tions, you can set individual reclosure parameters for the 2nd to 4th cycles. The same
options are available as for the first cycle. Again, only some of the parameters shown
below will be available depending on the selections made during configuration of the
scope of protection functions.
For the 2nd cycle:
For the 3rd cycle:
For the 4th cycle:
3461 2.AR: START Start in 2nd cycle generally allowed
3462 2.AR: T-ACTION Action time for the 2nd cycle
3464 2.AR Tdead 1Flt Dead time after single-phase pickup
3465 2.AR Tdead 2Flt Dead time after two-phase pickup
3466 2.AR Tdead 3Flt Dead time after three-phase pickup
3467 2.AR Tdead1Trip Dead time after single-pole tripping
3468 2.AR Tdead3Trip Dead time after three-pole tripping
3469 2.AR: Tdead EV. Dead time after evolving fault
3470 2.AR: CB? CLOSE CB ready interrogation before reclosing
3471 2.AR SynRequest Sync. check after three-pole tripping
3472 3.AR: START Start in 3rd cycle generally allowed
3473 3.AR: T-ACTION Action time for the 3rd cycle
3475 3.AR Tdead 1Flt Dead time after single-phase pickup
3476 3.AR Tdead 2Flt Dead time after two-phase pickup
3477 3.AR Tdead 3Flt Dead time after three-phase pickup
3478 3.AR Tdead1Trip Dead time after single-pole tripping
3479 3.AR Tdead3Trip Dead time after three-pole tripping
3480 3.AR: Tdead EV. Dead time after evolving fault
3481 3.AR: CB? CLOSE CB ready interrogation before reclosing
3482 3.AR SynRequest Sync. check after three-pole tripping
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