Arc fault circuit breaker and apparatus for detecting wet...

Details Arc fault circuit breaker and apparatus for detecting wet... Arc fault circuit breaker and apparatus for detecting wet...

2007-01-09

2007-01-09

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

C361S006000, C361S007000

Reexamination Certificate

active

10850885

ABSTRACT:
An apparatus includes a first circuit detecting when an absolute value of a current signal is less than a first predetermined value and outputting a signal after a first time period. A comparator compares that signal to an envelope of a rectified current signal, in order to provide an output with a plurality of pulses that persist for a relatively longer time for a relatively small value of the envelope, and persist for a relatively shorter time for a relatively large value of the envelope. A second circuit enables the comparator output if the rectified current signal exceeds a second predetermined value, and disables the comparator output after the rectified current signal is below the second predetermined value for a second time period. A third circuit accumulates the pulses and outputs a signal representative of a wet track arc fault.

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