Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2006-06-27
2006-06-27
Benson, Walter (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C324S512000
Reexamination Certificate
active
07068045
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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Joseph C. Zuercher, et al., “Method for Realistic Evaluation of Arc Fault Detection Performance”, Chicago Intertech Conferernce, Sep., 2001, 7 pp.
McClanahan David L.
Zuercher Joseph C.
Benson Walter
Gaton Corporation
Union Marvin L.
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