Arc fault circuit interrupter

Details Arc fault circuit interrupter Arc fault circuit interrupter

G - Physics

01

R

G01R 31/02 (2006.01) G01R 31/327 (2006.01) H01H 9/50 (2006.01) H01H 83/02 (2006.01) H02H 1/00 (2006.01)

Patent

CA 2281452

An arc fault detector for detecting electric power lines includes a sensor for sensing the derivative of the current on the electric power line, a converter circuit for converting the derivative of the line current into first and second signals, the first signal responsive to positive step transitions of arc fault current, and the second signal responsive to negative step transitions of arc current, and a temporal detector for signaling the presence of an arc fault when one of the first and second signals follows the other within a predetermined time, or window, and in which a sequence of one of the signals following the other signal occurs in a second predetermined interval of time.

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