Low cost arc fault detection technique

Details Low cost arc fault detection technique Low cost arc fault detection technique

2008-07-15

2008-07-15

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S007000, C361S078000, C361S079000, C361S044000, C361S045000, C361S047000

Reexamination Certificate

active

11320865

ABSTRACT:
Low cost apparatus and methods of detecting arc faults for better discriminating electrical events. The arc fault detection apparatus includes a current sensor, a di/dt input sense circuit, a dv/dt input sense circuit, and a processing unit. The current sensor monitors a power line current, and provides high frequency components of the power line current to the di/dt input sense circuit. The dv/dt input sense circuit monitors a power line voltage. The di/dt and dv/dt input sense circuits generate signals carrying information relating to changes in the power line current and the power line voltage, respectively. The processing unit analyzes these changes in the power line current and the power line voltage to discriminate detected electrical arcing events from nuisance loads with increased accuracy.

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U.S. Appl. No. 11/225,585, filed Sep. 13, 2005 entitled Arc Fault Detection Technique.

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