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Ground fault circuit interrupter plug

  • US 5,661,623 A
  • Filed: 05/22/1995
  • Issued: 08/26/1997
  • Est. Priority Date: 09/02/1993
  • Status: Expired due to Term
First Claim
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1. A ground fault circuit interrupter plug comprising:

  • a housing having a pair of plug blades for connection to an AC receptacle and a pair of output terminals for connection to an AC load;

    a circuit board within said housing; and

    electrical circuitry carried by said circuit board for providing ground fault protection to an AC load connected to said output terminals, said electrical circuitry including;

    a relay comprising a relay coil and a pair of relay contact sets operated by said relay coil for selectively connecting and disconnecting said plug blades and said output terminals, each of said relay contact sets comprising a fixed contact structure mounted to said circuit board and a movable contact structure mounted to said circuit board; and

    an electronic circuit coupled to said relay coil for maintaining said relay contact sets in a closed position to connect said plug blades to said output terminals in the absence of a ground fault condition, and for causing said relay contact sets to move to an open position to disconnect said plug blades from said output terminals in response to a ground fault condition.

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