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Remote light indication fault indicator with a timed reset circuit and a manual reset circuit

  • US 6,479,981 B2
  • Filed: 08/18/2000
  • Issued: 11/12/2002
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Fees
First Claim
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1. A fault indicator for providing indication of a fault current outside the exterior surface of an electrical equipment enclosure, comprising:

  • a circuit monitoring module;

    a remote fault indicator light module operatively connected to said circuit monitoring module and mounted to said exterior surface of said enclosure;

    a battery contained within said circuit monitoring module;

    a light source contained within said remote fault indicator light module operable from said battery;

    a magnetically actuated switch conditioned to open in response to a magnetic field in one direction and close in response to a magnetic field in the other direction;

    a magnetic winding responsive to the current in the monitored conductor for developing a magnetic field in a direction to condition said switch open during normal current flow in the monitored conductor, and for developing a magnetic field in said opposite direction to condition said switch closed upon occurrence of a fault current in the conductor;

    said magnetically actuated switch connecting said battery to said light source;

    said light source providing a light indication of said occurrence of said fault current; and

    a timed reset circuit for maintaining said fault indication for a predetermined period of time and resetting said light source upon expiration of said predetermined period of time.

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