Ground fault circuit interrupter

Details Ground fault circuit interrupter Ground fault circuit interrupter

1975-10-01

1977-06-21

Duggan, Donovan F.

Electrical transmission or interconnection systems

Personnel safety or limit control features

324133, 361 42, H02H 328

Patent

active

040314316

ABSTRACT:
Apparatus including polarity sensing means and a switch such as a Triac for providing a ground fault circuit interrupter system for an electrical load such as a hand-held appliance. The Triac is electrically connected in a completed circuit with the electrical load and is positively positioned in series with the line conductor of an A.C. power source. Automatic testing circuitry such as introducing synthetic and counterbalancing synthetic faults to the system is included.

REFERENCES:
patent: 2474407 (1949-06-01), Todd et al.
patent: 3312862 (1967-04-01), Currin
patent: 3437928 (1969-04-01), Baker et al.
patent: 3525019 (1970-08-01), Lansch
patent: 3617808 (1971-11-01), Yoder
patent: 3766434 (1973-10-01), Sherman
patent: 3828256 (1974-08-01), Liu
patent: 3857096 (1974-12-01), Gregory
patent: 3932790 (1976-01-01), Muchnick

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