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

1978-06-19

1979-08-28

Rubinson, Gene Z.

Electricity: motive power systems

Braking

Dynamic braking

318245, 318247, 318381, H02P 318

Patent

active

041662407

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 armature to achieve dynamic braking. A timing circuit operates 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.

REFERENCES:
patent: 3107321 (1963-10-01), Osawa
patent: 3119394 (1964-01-01), Knittel
patent: 3522401 (1970-08-01), Stene
patent: 3548276 (1970-12-01), Gross
patent: 3559121 (1971-01-01), Powell et al.
patent: 3673481 (1972-06-01), Hardin
patent: 3851233 (1974-11-01), Sherman

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