19
CO N T R O L S C H EM E
Sequence of circuit breaker operation
19
ADVAC
®
38kV | Installation, operations, and maintenance manual
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Control scheme
Charging motor
Closing spring
Opening spring
Contact spring
Closing coil
Open coil
Circuit breaker
ON
OFF
Control voltage available to charging motor
Closing spring charged
Close signal
Start of closing operation
Close operation complete
Closing spring discharged
Opening spring charged
Compression springs charged
Closing spring charged
Start of opening operation
Open operation complete
Compression springs discharged
Closing time
Opening time
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Opening springs discharged
Sequence of Circuit Breaker Operation