Circuit breaker Part 9: Operation and Control Part 1

Control voltage:

Control voltage is a DC supply used for the control circuits such a Close circuit and Trip circuits etc.

Common rated control voltages:

110, 220 V DC 

(Less common rated control voltage: 48 V DC)

Heating voltage / AC Auxiliary voltage:

AC Auxiliary voltage is an AC single-phase (phase – neutral) supply used for Heaters, Socket outlet and Lighting etc. when used.

Normal values: 220 - 240 V AC

Motor voltage:

Motor voltage is a DC supply or an AC single-phase (phase–neutral) supply for the spring charging motor.

Common rated motor voltages:

110, 125, 220 and 240 V DC

115, 120, 127, 230 and 240 V AC

Closing spring charge motor:

The closing spring charging motor charges the closing spring after every closing operation.

Motor contactor:

Motor contactor is controlled by the limit switch and starts/stops the closing spring charging motor.