Ground fault apparatus and protection system

Details Ground fault apparatus and protection system Ground fault apparatus and protection system

1979-03-26

1980-11-11

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 46, H02H 3347

Patent

active

042336406

ABSTRACT:
A unique ground fault circuit interrupting (GFCI) device is utilized to control either an industrial circuit breaker or a contactor in protecting a large power distribution circuit against ground faults. The GFCI device is equipped with plural sets of switch contacts which are actuated incident with tripping of the GFCI device. The particular switch contacts are selected to control energization of an actuator adapted to the circuit breaker or contactor, depending on the actuator type. A ground fault sensor responds to ground faults on the distribution circuit by injecting a current imbalancing signal into the GFCI device, causing it to trip. The consequent switch contact actuation initiates operation of the circuit breaker or contactor to interrupt the distribution circuit.

REFERENCES:
patent: 3869649 (1975-03-01), Hobson, Jr.
patent: 3953766 (1976-04-01), Howell
patent: 4010432 (1977-03-01), Klein et al.
patent: 4044395 (1977-08-01), Eckart
patent: 4156884 (1979-05-01), Eckart et al.

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