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ALTERNATING CURRENT FAULT INDICATING MEANS

  • US 3,715,742 A
  • Filed: 06/01/1971
  • Issued: 02/06/1973
  • Est. Priority Date: 06/01/1971
  • Status: Expired due to Term
First Claim
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1. Means responsive to flow of alternating fault current in and high voltage energization of a conductor comprising:

  • means for responding to current flow in said conductor, capacitor means, reset rectifier means, conductive circuit means for directly interconnecting said capacitor means and said conductor through said rectifier means to charge said capacitor means to a unidirectional voltage corresponding to the alternating energizing voltage of said conductor, and fault indicating means remote from said conductor including;

    a target, a magnetic core, a trip winding on said magnetic core circuit means interconnecting said trip winding and said current flow responsive means for moving said target from a non-indicating position to a fault indicating position in response to flow of fault current in said conductor, and a reset winding on said magnetic core connected to be energized from said capacitor means for moving said target from said fault indicating position to said non-indicating position on application of energizing voltage to said conductor and current flow therein less than fault current flow.

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