Ground fault interrupter tester

Details Ground fault interrupter tester Ground fault interrupter tester

1979-04-23

1981-07-21

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324133, G01R 3102

Patent

active

042800927

ABSTRACT:
A hand-held ground fault interrupter for checking the operation of a ground fault protected wall receptacle. The blades of an electrical terminal protrude from one end of a housing which contains a potentiometer and electrical connecting means between the potentiometer and the blades. The tester creates a ground fault by allowing current to leak to the ground path, the amount of leakage varied by the potentiometer. A properly operating ground fault interrupter senses the leakage and is designed to trip when it sees a selected level of current leakage. Tripping at lower levels or failure to trip at higher levels indicates a defective interrupter. Recesses in the sides of the housing provide access to the potentiometer dial for rotating the dial and reading a label affixed thereto.

REFERENCES:
patent: 3821639 (1974-06-01), Langis
patent: 3898557 (1975-08-01), Strock
patent: 4002968 (1977-01-01), Reid
patent: 4006409 (1977-02-01), Adams
patent: 4127807 (1978-11-01), Peplow et al.
patent: 4166242 (1979-08-01), Spiteri

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