Methods and apparatus for analyzing high voltage circuit...

Details Methods and apparatus for analyzing high voltage circuit... Methods and apparatus for analyzing high voltage circuit...

2005-02-01

2005-02-01

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Electromechanical switching device

Circuit breaker

C324S523000

Reexamination Certificate

active

06850072

ABSTRACT:
Methods, computer program segment and apparatus for analyzing high voltage circuit breakers are provided. The method includes electrically coupling each circuit breaker contact to ground, applying a test voltage across a circuit breaker contact, measuring an output voltage signal that is proportional to a capacitance of the circuit breaker contact, changing a state of the circuit breaker contact pair from at least one of an open position to a closed position and the closed position to the open position, and detecting a step change of the output voltage that corresponds to the change of state of the circuit breaker. A circuit breaker test device is provided. The device includes a test voltage source, a filter circuit, and an output circuit for measuring the circuit breaker contact pair capacitance, wherein the test voltage source and filter circuit are configured to be coupled to the circuit breaker contact pair during testing.

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