Ground fault circuit interrupter using frequency recognition and measurement
Number of patents in Portfolio can not be more than 2000
United States of America
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Dec 28, 2021
Grant Date -
May 21, 2020
app pub date -
Jan 21, 2020
filing date -
Jan 21, 2020
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A wiring device including an interrupting device, a fault detection circuit, and a testing circuit. The interrupting device is electrically connecting one or more line terminals to one or more load terminals. The fault detection circuit is configured to detect a fault condition and generate a fault detection signal in response to detecting the fault condition. The fault detection signal being provided to the interrupting device to place the interrupting device in a tripped condition. The testing circuit is configured to determine a frequency of an input voltage at the one or more line terminals, filter the frequency of the input voltage, determine whether the filtered frequency is within a predetermined range, and when the filtered frequency is within the predetermined range, perform a test of the wiring device.
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