Self-powered current sensing switch with digital setpoint
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United States of America Patent
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Apr 15, 2014
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app pub date -
Nov 6, 2013
filing date -
Nov 6, 2013
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Abstract
An apparatus for setting a digital setpoint for a self-powered current sensing switch includes a current transformer, a digital processor and a parallel converter for converting the AC output of the current transformer to a DC power source for the digital processor along a first path and into a digital signal which is input to the digital processor along a second path. The apparatus also includes a manually operated switch coupled to the digital processor and having a calibration mode position, code segments executing on the digital processor to convert the digital signal to a digital setpoint value when the manually operated switch is in the calibration mode position, and non-volatile memory for storing the digital setpoint value.
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