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Electrical line-fault detector and circuit breaker device

  • US 5,424,894 A
  • Filed: 11/24/1992
  • Issued: 06/13/1995
  • Est. Priority Date: 11/24/1992
  • Status: Expired due to Fees
First Claim
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1. An electrical circuit breaker apparatus for disconnecting power supplied to a load device by a power source by way of internal wiring conductors of a building, comprising:

  • detecting means for producing a first signal representative of an electrical parameter near the power source when the load device is turned "off" and for producing a second signal representative of a corresponding electrical parameter near the load when the load is turned "on";

    comparator means for producing a third signal responsive to a difference between said first and second signals; and

    disconnect means for responding to said third signal to open the circuit to said load in response to at least series resistive fault conditions in the internal wiring between the source and the load.

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