Method and apparatus for remotely actuating a circuit protection device
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United States of America Patent
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Apr 27, 2004
Grant Date -
N/A
app pub date -
Aug 2, 2001
filing date -
Aug 2, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for remotely operating a circuit protection device, such as a circuit breaker, to move the circuit protection device to an open condition to disconnect a load from a power source. The apparatus includes a control circuit positioned externally from the circuit protection device. The control circuit includes an impedance limiter and a switching device connected in series with each other. The impedance limiter and switching device are positioned in parallel with the load. The switching device can be remotely actuated to move between an open position and a closed position. When the switching device is in the closed position, the impedance limiter draws a supply of current through the impedance limiter. The size of the impedance limiter is selected such that the current drawn from the power source is greater than the trip current required to move the circuit protection device to the open position. Thus, the switching device can be used to remotely actuate the circuit protection device.
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