Control circuit for circuit breaker ac motor operator

Details Control circuit for circuit breaker ac motor operator Control circuit for circuit breaker ac motor operator

H - Electricity

02

P

318/84

H02P 3/18 (2006.01) H02P 3/06 (2006.01)

Patent

CA 1131698

41PR-3273 ABSTRACT A control circuit controls AC energization of a universal, series wound AC motor in a circuit breaker motor operator to power a breaker charging cycle. At the end of a charging cycle, the motor field winding remains energized from the AC source, however a braking resistor is switched across the de-energized motor arma- ture to achieve dynamic braking. A timing circuit oper- ates in the dual capacity of controlling dynamic motor braking and preventing continued running of the motor operator should the breaker operating mechanism fail to reset during a charging cycle.

330063

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