Hand-held tester for receptacle ground fault circuit interrupter

Details Hand-held tester for receptacle ground fault circuit interrupter Hand-held tester for receptacle ground fault circuit interrupter

1995-06-05

1997-06-24

O'Shea, Sandra L.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Instruments and devices for fault testing

324555, H01H 3102

Patent

active

056420528

ABSTRACT:
An electrical test device for testing the function of a receptacle ground fault circuit interrupter. The tester plugs into a receptacle and includes a current source, timer, testing circuit, and display. The current source introduces a substantially constant fault current between the hot and ground leads of the receptacle. Once this occurs, the timer begins counting time and generates a time count signal. The test circuit receives the time count signal and determines whether the interrupter enters a tripped state within a designated time. The testing circuit responsively generates a trip indicator signal reflecting whether or not the ground fault interrupter circuit tripped within the designated trip time. The display means receives the trip indicator signal and responsively indicates whether the interrupter functioned properly by tripping the designated trip time. Further, the tester includes a volt meter and wiring status indicator to advise the user of the voltage between the hot and neutral lines of the receptacle as whether the receptacle has been incorrectly connected to power lines.

REFERENCES:
patent: 3898557 (1975-08-01), Strock
patent: 4135129 (1979-01-01), Johnston et al.
patent: 4280092 (1981-07-01), Wells, Jr. et al.
patent: 4292585 (1981-09-01), Charette
patent: 5285163 (1994-02-01), Liotta
patent: 5525908 (1996-06-01), Brownell
ETCON Electronic Products Brochure ("ETCON . . . Expect More") (1989); pp. 1-12.

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