Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1976-07-12
1978-03-21
Miller, J D
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 86, 361 87, H02H 328
Patent
active
040806413
ABSTRACT:
A ground fault detector which exhibits greater sensitivity to sensing coil current during the initial portions of a-c line voltage half-cycles than during the final portions of those half cycles. This improves its response to resistive ground faults in the presence of unbalanced capacitance to ground conditions of the a-c power lines.
REFERENCES:
patent: 3787709 (1974-01-01), Coe
patent: 3852642 (1974-12-01), Engel et al.
patent: 3953767 (1976-04-01), Ahmed
patent: 3963963 (1976-06-01), Schade, Jr.
Christoffersen H.
Cohen S.
Limberg A. L.
Miller J D
RCA Corporation
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