Ground fault circuit interrupter and electronic module therefor

Details Ground fault circuit interrupter and electronic module therefor Ground fault circuit interrupter and electronic module therefor

1974-09-16

1976-04-27

Miller, J. D.

317 27R, 317 36TD, H02H 326

Patent

active

039537668

ABSTRACT:
An electronic module for ground fault circuit interrupters (GFCI) in both circuit breaker and receptacle configurations includes a signal processor having a plurality of fault signal threshold stages for differentially charging an integrating capacitor in accordance with the magnitude of the fault signal as amplified by a high gain differential amplifier. The accumulated charge on the integrating capacitor controls the generation of a trip signal. The processor also includes a highly stable grounded neutral excitation oscillator and a noise rejection network to combat nuisance tripping.

REFERENCES:
patent: 3339114 (1967-08-01), Kelley et al.
patent: 3619723 (1971-11-01), Walden
patent: 3787709 (1974-01-01), Coe
patent: 3800189 (1974-03-01), Montz
patent: 3806764 (1974-04-01), Hobson, Jr. et al.
patent: 3836821 (1974-09-01), Wahlgren et al.
patent: 3849706 (1974-11-01), Johnson et al.

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