Apparatus and method for determining mis-wiring in a ground fault circuit interrupter
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United States of America Patent
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Feb 1, 2005
Grant Date -
Feb 26, 2004
app pub date -
Aug 23, 2002
filing date -
Aug 23, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A GFCI mis-wiring detector includes a set of input terminals for an AC source, and a set of output terminals for an AC load. The set of output terminals are conductively connected to the set of input terminals. A GFCI circuit has one or more switches that selectively interrupt the connection between the set of input terminals and the set of output terminals when a ground fault occurs. A mis-wiring detection circuit causes the one or more switches of the GFCI circuit to open when the AC source is electrically coupled to the set of output terminals for a first time interval, even if there is no imbalance in the current flow. Additionally, a suppression circuit suppresses operation of the mis-wiring detection circuit when the AC source is electrically coupled to the input terminals for a second time interval. The second time interval is less than the first time interval.
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