Arc fault circuit interrupter
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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Dec 9, 1998
filing date -
Dec 9, 1998
priority date (Note) -
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status (Latency Note)
Importance
Abstract
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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