Ground fault circuit interrupting device and differential curren

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Details

317 18R, 317 18D, 317 27R, 317 33R, H02H 328

Patent

active

039639592

ABSTRACT:
The secondary winding of a differential current transformer in a ground fault circuit interrupter is short circuited through an electronic switch. The switch is periodically opened to force any secondary current occasioned by the existence of a ground fault to flow through a burden resistor, thereby developing a relatively high amplitude signal voltage thereacross for processing by a signal processor pursuant to initiating circuit interruption.

REFERENCES:
patent: 3213321 (1965-10-01), Dalziel
patent: 3353065 (1967-11-01), Bassani
patent: 3522478 (1970-08-01), Reis
patent: 3535590 (1970-10-01), Mayer
patent: 3713003 (1973-01-01), Benham

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