Arc fault detection apparatus employing a comparator with a...

Details Arc fault detection apparatus employing a comparator with a... Arc fault detection apparatus employing a comparator with a...

2011-03-01

2011-03-01

Pert, Evan (Department: 2826)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

C361S093100

Reexamination Certificate

active

07898781

ABSTRACT:
An arc fault detection apparatus that provides for better discrimination of electrical arcing events from nuisance loads. The arc fault detection apparatus includes an arcing sense circuit having a comparator circuit with a variable threshold voltage that varies continuously with the line voltage. The arc fault detection apparatus has reduced susceptibility to nuisance tripping in the presence of sudden changes in the load current that occur outside of a specified time window centered on each zero crossing point of the line voltage.

REFERENCES:
patent: 7190561 (2007-03-01), Pellon et al.
patent: 7190562 (2007-03-01), Pellon et al.

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