Differential arc fault detection
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United States of America Patent
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Feb 10, 2009
Grant Date -
Jun 5, 2008
app pub date -
Nov 30, 2006
filing date -
Nov 30, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus detect arc faults. The method and apparatus may digitally detect current and voltage signals at a master node (111) positioned at a first point in a wiring system (131). At a second point in the wiring system (131), a slave node (122) may digitally detect current and voltage signals. An arc fault that develops between the first and second points in the wiring system (131) may be detected by comparing the current signals from the master node (111) and from the slave node (122), and comparing the voltage signals from the master node (111) and from the slave node (122).
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