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Monitor providing cause of trip indication and circuit breaker incorporatiing the same

  • US 20050103613A1
  • Filed: 11/13/2003
  • Published: 05/19/2005
  • Est. Priority Date: 11/13/2003
  • Status: Active Grant
First Claim
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1. A circuit breaker for providing protection in an electric power distribution system, the circuit breaker comprising:

  • separable contacts;

    an operating mechanism opening the separable contacts when actuated;

    a trip unit comprising a thermal/magnetic trip device producing a thermal trip by actuating the operating mechanism in response to persistent overload conditions and producing a magnetic trip by actuating the operating mechanism in response to overcurrent conditions; and

    a monitor providing a thermal trip indication when the separable contacts are opened by the thermal trip and providing a magnetic trip indication when the separable contacts are opened by the magnetic trip.

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