Apparatus for detecting arc fault

Details Apparatus for detecting arc fault Apparatus for detecting arc fault

H - Electricity

01

H

H01H 83/00 (2006.01) G01R 31/08 (2006.01) H02H 1/00 (2006.01)

Patent

CA 2445690

An apparatus for detecting an arc fault. The apparatus comprises a current detector for detecting the amount of change of current flowing on the wire and generating a signal proportional to the amount of change; a signal transformer for passing a high frequency component of the signal outputted from the current detector, and limiting a level of the signal not to exceed a fixed signal level; a first level limit amplifier for amplifying a signal outputted from the signal transformer so as to limit the level of the outputted signal; a signal level detector for determining whether a input signal exceeds a fixed first voltage and generating a detection signal; a pulse generator for transforming the detection signal outputted from the signal level detector into a form of normalized pulse; a first arc determination unit for counting a pulse signal outputted from the pulse generator for a predetermined time, determining whether the arc has been occurred and generating an arc detection signal; and a circuit breaker for breaking the conductive wire when the are detection signal is generated.

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