Fail-safe ground fault receptacle circuit

Details Fail-safe ground fault receptacle circuit Fail-safe ground fault receptacle circuit

1976-03-23

1977-09-27

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

H02B 328

Patent

active

040515443

ABSTRACT:
A fail-safe ground fault receptacle circuit includes a ground fault circuit interrupter inductively coupled to a load, directly coupled to one potential source terminal, and coupled by way of a series connected solenoid winding and contacts of a circuit breaker shunted by a series connected impedance and indicating lamp to another potential source terminal whereby manually closing the circuit breaker causes current flow through the solenoid winding shunting the indicator lamp and preventing activation thereof and excessive current flow through the solenoid winding opens the circuit breaker to cause current flow through and activation of the indicating lamp.

REFERENCES:
patent: 3633070 (1972-01-01), Vassos et al.
patent: 3806764 (1974-04-01), Hobson, Jr. et al.
patent: 3813579 (1974-05-01), Doyle et al.
patent: 3852642 (1974-12-01), Engel et al.
patent: 3879639 (1975-04-01), Sircom
patent: 3931601 (1976-01-01), Anderson
patent: 3973171 (1976-08-01), Howell

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