Ground fault protection system

Details Ground fault protection system Ground fault protection system

1976-08-02

1977-08-23

Miller, J. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 48, H02H 328

Patent

active

040443957

ABSTRACT:
A conventional residential ground fault circuit interrupting (GFCI) device is utilized to control a traditional circuit interrupter in protecting a large power distribution circuit against ground faults. The GFCI device is connected in an energization circuit for a solenoid operable to open the interrupter contacts. A sensor responds to ground faults on the distribution circuit by impressing the current signal on one side of the energization circuit, thus creating a current imbalance effective to trip the GFCI device. Interruption of the energization circuit causes the solenoid to initiate opening of the interrupter contacts. In an alternative embodiment, the GFCI device is adapted to initiate opening of the interrupter contacts upon degradation of ground circuit continuity.

REFERENCES:
patent: 3427505 (1969-02-01), Biedermann
patent: 3872355 (1975-03-01), Klein et al.
patent: 3898528 (1975-08-01), Runtsch et al.

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