Patent ID: 9431816
Filing Date: 2016-08-30
CPC Classification: G01R,H02H

Claim Text:
1. A direct current arc fault detector for a direct current power circuit having a current flowing therein, said direct current arc fault detector comprising: a first current sensor structured to sense an alternating current component of the current flowing in said direct current power circuit; a second current sensor structured to sense a direct current component of the current flowing in said direct current power circuit; a bandpass filter structured to filter the sensed alternating current component of the current flowing in said direct current power circuit; a demodulating logarithmic amplifier including an input of the filtered alternating current component of the current flowing in said direct current power circuit, and an output; an integrator or minimum detector circuit including an input electrically connected to the output of said demodulating logarithmic amplifier, and an output; and a processor structured to repetitively input and then reset the output of said integrator or minimum detector circuit, and: