Self fault-detection circuit for ground fault circuit interrupter
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United States of America Patent
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May 17, 2011
Grant Date -
Jul 16, 2009
app pub date -
Jun 20, 2008
filing date -
Jan 14, 2008
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Abstract
A self fault-detection circuit for a ground fault circuit interrupter comprising: (i) a Metal Oxide Varistor (MOV) fault detection unit for detecting a fault condition of the MOV, and sending a first trigger signal if a fault condition of the MOV is detected, (ii) a trip circuit fault detection unit for detecting a fault condition of a trip circuit, and sending a second trigger signal if a fault condition of the trip circuit is detected; and (iii) a fault reaction unit for receiving at least one of the first trigger signal and the second trigger signal, and responding to the first and second trigger signals with an action, when at least one of the first and the second trigger signals is received by the fault reaction unit, the fault reaction unit indicates that at least one fault condition exists in the ground fault circuit interrupter.
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