For single-phase Autoreclose no voltage or synchronism check is required as synchronising power is flowing in the
two healthy phases. Three-phase Autoreclose can be performed without checking that voltages are in
synchronism for the first shot (and only the first shot). The settings to permit Autoreclose without checking voltage
synchronism on the first shot are:
● CB1L SC Shot 1 for circuit breaker 1 as a leader,
● CB1F SC Shot 1 for circuit breaker 1 as a follower,
● CB2L SC Shot 1 for circuit breaker 2 as a leader,
● CB2L SC Shot 1 for circuit breaker 2 as a follower.
When the circuit breaker has closed, the Autoreclose function asserts a DDB signal Set CB1 Close, which indicates
that an attempt has been made to close the circuit breaker. At this point, the Reclaim Time starts. If the circuit
breaker remains closed after the reclaim timer expires, the Autoreclose cycle is complete, and signals are
generated to indicate that Autoreclose was successful. These are:
● CB1 Succ 1P AR (Single-phase Autoreclose CB1)
● CB2 Succ 1P AR (Single-phase Autoreclose CB2)
● CB1 Succ 3P AR (Three-phase Autoreclose CB1)
● CB2 Succ 3P AR (Three-phase Autoreclose CB2)
These signals increment the relevant circuit breaker successful Autoreclose shot counters, as well as resetting the
Autoreclose in progress signal.
The relevant circuit breaker successful Autoreclose shot counters are:
● CB1 SUCC SPAR (Single-phase Autoreclose CB1)
● CB1 SUCC 3PAR Shot1 (Three-phase Autoreclose CB1, Shot 1)
● CB1 SUCC 3PAR Shot2 (Three-phase Autoreclose CB1, Shot 2)
● CB1 SUCC 3PAR Shot3 (Three-phase Autoreclose CB1, Shot 3)
● CB1 SUCC 3PAR Shot4 (Three-phase Autoreclose CB1, Shot 4)
● CB2 SUCC SPAR (Single-phase Autoreclose CB2)
● CB2 SUCC 3PAR Shot1 (Three-phase Autoreclose CB2, Shot 1)
● CB2 SUCC 3PAR Shot2 (Three-phase Autoreclose CB2, Shot 2)
● CB2 SUCC 3PAR Shot3 (Three-phase Autoreclose CB2, Shot 3)
● CB1 SUCC 3PAR Shot4 (Three-phase Autoreclose CB2, Shot 4)
P446SV Chapter 11 - Autoreclose
P446SV-TM-EN-1 335
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