Patent ID: 8072716
Filing Date: 2011-12-06
Classification: H02H

Abstract:
1. An AFCI device which detects an electric arc fault from an alternating-current (AC) power, the AFCI device comprising: a current transformer wound around one side of which a conductor line through which the alternating-current power is supplied by a certain number of times; a power circuit which rectifies an alternating-current voltage signal induced from the conductor that is wound around one side of said current transformer, and converts the rectified result into a constant voltage signal to then be supplied as drive power necessary for an arc fault detector; an arc fault detector supplied with the drive power from said power circuit, which detects an arc fault from a voltage signal according to an amount of current variation of said current transformer; a power breaker which shuts off the power source when an interrupt signal is applied from said arc fault detector; a display which displays the supply of the power source to ascertain whether lines are connected; and a false arc generator which produces a pulse signal of a waveform that generates a false arc, supplies the generated pulse signal to said arc fault detector, and tests whether a circuit operation is normally operated, wherein said false arc generator comprises: wherein the switching unit comprises: