Control circuit for circuit breaker DC motor operator

Details Control circuit for circuit breaker DC motor operator Control circuit for circuit breaker DC motor operator

1978-03-24

1979-12-18

Rubinson, Gene Z.

Electricity: motive power systems

Braking

Dynamic braking

318364, 318369, 318447, H02P 312

Patent

active

041796462

ABSTRACT:
A circuit breaker motor operator control circuit utilizes the voltage developed across a dynamic braking resistor during breaking of a permanent magnet DC motor to prevent re-energization of the motor until it has been braked to a virtual stop. The control circuit also includes a timing network operating to prevent continued pumping of the breaker operating mechanism by the motor operator should the operating mechanism for some reason fail to become charged within a prescribed time period.

REFERENCES:
patent: 2726363 (1965-12-01), Scully
patent: 3017555 (1962-01-01), Newman et al.
patent: 3303404 (1967-02-01), Raub, Jr.
patent: 3715642 (1973-02-01), Walter
patent: 4042896 (1977-08-01), Powell et al.

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