Digital fault interrupter with self-testing capabilities
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United States of America Patent
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Oct 19, 2004
Grant Date -
Dec 5, 2002
app pub date -
Mar 4, 2002
filing date -
Apr 26, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ground fault interrupter apparatus is provided that employs a switching device that is operated in two stages. The first stage operates a solenoid in order to close the contacts and preferably provides coupling between the load and the power source. The second stage maintains the coupling, however, drawing less current and power from the internal devices of the apparatus. Accordingly, the fault interrupter meets various standards for the time required to open and close the contacts as well as keeping the dissipated heat from the device within the required range.
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