Ground fault protective device

Details Ground fault protective device Ground fault protective device

1976-06-15

1978-02-28

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361115, H02H 328

Patent

active

040770559

ABSTRACT:
A self-powered self-contained ground fault protective device including a current monitor, an electronic circuit for amplifying the output of the current monitor, a relay connected to the amplifying circuit and adapted to operate whenever ground fault current through the current monitor rises above a predetermined level, and an interchangeable rating plug including means for activating a circuit board switch. The current monitor, amplifying circuit, and relay are all supported and enclosed by a molded insulating housing. The rating plug is inserted into a socket on the exterior of the housing.

REFERENCES:
patent: 3440580 (1969-04-01), Molenaar
patent: 3826951 (1974-07-01), Mater et al.
patent: 3899717 (1975-08-01), Legatti et al.

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