Magnetic tampering detection in a utility meter
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United States of America Patent
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May 23, 2017
Grant Date -
Jan 1, 2015
app pub date -
Jun 28, 2013
filing date -
Jun 28, 2013
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Abstract
A method of detecting a magnetic coupling in a meter includes obtaining in an electricity meter information representative of power consumption as measured within the meter of a plurality of lines of an electrical service. The method also includes obtaining from a magnetic sensor information representative of a magnetic field within an electricity meter. A processing circuit then determines whether a first condition exists wherein the magnetic field exceeds a first threshold and the information representative of the power consumption indicates a load imbalance on the plurality of lines such that the load imbalance exceeds an imbalance threshold. The method further includes performing a processing step responsive to a determination that the first condition exists.
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