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Ground fault current interrupter circuit with arcing protection

  • US 4,931,894 A
  • Filed: 09/29/1989
  • Issued: 06/05/1990
  • Est. Priority Date: 09/29/1989
  • Status: Expired due to Term
First Claim
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1. A ground fault current interrupter circuit for use with a system including a power line and a neutral line in a cable having a metal sheath comprising:

  • a differential transformer having a pair of opposed primary windings and a secondary winding located on the core thereof;

    circuit opening means to break the power line when a trip signal is produced in said secondary winding by an imbalance in said differential transformer resulting from a ground fault; and

    arc protection means responsive to arcing between the power line and the metal sheath to cause actuation of said circuit opening means to break the power line.

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