Apparatus and method for arc fault detection based on signal-to-noise ratio
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United States of America Patent
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Sep 21, 2021
Grant Date -
Feb 25, 2021
app pub date -
Aug 21, 2019
filing date -
Aug 21, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure relates to arc fault detection in an electrical switch apparatus. In aspects of the present disclosure, an arc fault electrical switch apparatus includes a conductive path, a switch configured to interrupt electrical current in the conductive path, a current sensor in electrical communication with the conductive path and configured to measure the electrical current to provide current measurements, and a controller. The controller is configured to execute instructions to sample the current measurements to provide current samples, computing an estimated signal-to-noise ratio of the electrical current based on at least a portion of the current samples, determine whether the signal-to-noise ratio is less than a predetermined threshold, and activate the switch to interrupt the electrical current in the conductive path, if the signal-to-noise ratio is less than the predetermined threshold.
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