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Lockout mechanism for use with ground and arc fault circuit interrupters

  • US 6,621,388 B1
  • Filed: 04/05/2001
  • Issued: 09/16/2003
  • Est. Priority Date: 04/06/2000
  • Status: Expired due to Fees
First Claim
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1. A lockout for a reset mechanism of an electrical protective device, comprising:

  • a spring biasing said lockout;

    a resistor body which holds said lockout in a first position against action of said spring, wherein said first position permits resetting said electrical protective device; and

    a switch responsive to an internal fault in said electrical protective device, wherein activation of said switch sends a current through said resistor body;

    wherein when said resistor body reaches a predetermined temperature, said resistor body ceases to hold said lockout in said first position, whereby said lockout moves to a second position by action of said spring, and wherein said second position prevents resetting of said electrical protective device.

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