Manually set ground fault circuit interrupter

Details Manually set ground fault circuit interrupter Manually set ground fault circuit interrupter

1993-09-02

1995-05-23

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 50, 361114, 335 27, 335 19, 335 20, H02H 316

Patent

active

054186781

ABSTRACT:
An improved ground fault circuit interrupter (GFCI) device requires manual setting following initial connection to an AC power source or termination of a power source interruption. The improved GFCI device utilizes a controlled switching device which is responsive to a load power signal for allowing the relay contact sets of the GFCI device to be closed only when power is being made available at the output or load terminals. The controlled switching device preferably comprises an opto-isolator or other type of switching device which provides isolation between the GFCI input and output terminals when the relay contact sets are open. The improved GFCI device may be incorporated into portable units, such as plug-in or line cord units, for use with unprotected AC receptacles.

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"RV4145 Low Power Ground Fault Interrupter", Raytheon Company, Semiconductor Division (Aug. 1988).
"Hubbell Wiring Devices Premise Wiring Products Kellems Products", Hubbell Incorporated, Catalog No. 101, pp. P-1 through P-17 (1990).
Model GFP-4C15 Schematic Diagram, Hubbell Incorporated, no date.
Model GFP-4C15 Schematic Diagram, Hubbell Incorporated, no date.
Model GFP-115A Schematic Diagram, Hubbell Incorporated, no date.
Model GFP-115A (Redesign) Schematic Diagram, Hubbell Incorporated.

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