Arc fault circuit interrupter system

Details Arc fault circuit interrupter system Arc fault circuit interrupter system

2007-08-07

2007-08-07

Benson, Walter (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

Reexamination Certificate

active

11225293

ABSTRACT:
In order to determine whether arcing is present in an electrical circuit, a sensor signal corresponding to current in said electrical circuit is processed. The sensor signal is filtered to determine the presence of noise in a predetermined frequency range and produce a corresponding filtered signal. The corresponding filtered signal is compared to a reference threshold voltage to generate an output signal potentially indicative of arcing. A selection is made of one from a plurality of available threshold voltages as the reference threshold voltage for use in the comparing operation. The detection operation supports either or both branch feeder arc fault detection and/or series arc fault detection.

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