Pulsing ground-test circuit

Details Pulsing ground-test circuit Pulsing ground-test circuit

1974-10-04

1977-04-05

Mullins, James B.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

340255, G01R 3102

Patent

active

040164888

ABSTRACT:
Ground-test device operating intermittently for brief periods of time to limit the current entering the ground system. The circuit itself, on the occurrence of a predesignated event in other circuitry, may initiate the tests for ground. The circuit disconnects itself from ground between tests. The device also develops an indication when the wiring from the source of a.c. power suffers from reversed polarity.

REFERENCES:
patent: 3176219 (1965-03-01), Behr
patent: 3407336 (1968-10-01), Embree
patent: 3699432 (1972-10-01), Brown
patent: 3716876 (1973-02-01), Petzon et al.
patent: 3809961 (1974-05-01), Kershaw
patent: 3810003 (1974-05-01), Portoulas
patent: 3913153 (1975-10-01), Adams et al.

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