Circuit protection device with grounded neutral half cycle self test
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United States of America Patent
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Aug 7, 2007
Grant Date -
N/A
app pub date -
Jan 30, 2004
filing date -
Nov 29, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is directed to a circuit and method for self-testing a protection device for use in an AC power distribution system. The device is configured to be coupled between an AC power distribution system and at least one load. The method includes the step of introducing a simulated ground neutral fault during a first predetermined half cycle half cycle of the AC power. An attempt is made to detect the introduced simulated grounded neutral fault during the first predetermined half cycle half cycle. A fault condition is signaled if the introduced simulated grounded neutral fault is not detected within a predetermined period of time.
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