Apparatus and method for real time determination of arc fault energy, location and type
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United States of America Patent
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Jun 27, 2006
Grant Date -
Jan 27, 2005
app pub date -
Jul 25, 2003
filing date -
Jul 25, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A detection module and remote load voltage sensor determine a location of a parallel arc for a power circuit between a power source and a load in real time. The detection module provides a value of voltage from the power source. A current sensor measures a value of current flowing in the power circuit to or from the power source. The remote load voltage sensor measures a value of voltage at the load. A microprocessor determines the parallel arc location from the value of voltage from the power source, the value of current, the value of voltage at the load, and a wire resistance or conductance per unit length of the power circuit. In one case, connector resistance is accounted for. In another case, the load voltage is encoded at a predetermined frequency using a switched precision resistor near the load, thereby providing a power line carrier type communication.
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