Ground fault circuit interrupter with end-of-life protection
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United States of America Patent
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May 19, 2009
Grant Date -
Dec 13, 2007
app pub date -
Jun 9, 2006
filing date -
Jun 9, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A circuit interrupter with end-of-life protection has four components: 1) a control circuit to activate an electromagnetic unit upon detecting a predetermined condition; 2) a fuse coupled between the control circuit and the power supply; 3) an end life sensing circuit coupled to the control circuit; and 4) an end life indicating circuit coupled to the end life sensing circuit and the power supply. The end life sensing circuit includes a light emitting device and a light sensitive device controlled by the light emitting device. The end life indicating circuit includes a visual indicator to indicate that the circuit interrupter reaches the end of its life. Another circuit interrupter with end-of-life protection has three components: 1) a control circuit to activate an electromagnetic unit upon detecting a predetermined condition; 2) a fuse coupled between the control circuit and the power supply; and 3) an end life sensing and indicating circuit coupled to the control circuit. The end life sensing and indicating circuit includes a light emitting device which is turned off to indicate that the circuit interrupter reached the end of its life.
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