Calibrating a power meter with a current transformer in the field
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United States of America Patent
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Mar 23, 2021
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N/A
app pub date -
Mar 11, 2019
filing date -
Mar 11, 2019
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Abstract
A power monitoring system includes a current transformer and a power meter. The current transformer includes a winding for sensing a measure of current in a conductor that supplies power to a load and a machine-readable apparatus that is secured relative to the current transformer and that encodes calibration information that is specific to the current transformer. The power meter includes a first input for receiving the measure of current and a second input for receiving a measure of voltage. A controller configured to receive the calibration information encoded in the machine-readable apparatus, calibrate the controller with the current transformer based on the calibration information and determine a number of power monitor parameters based at least in part on the calibration information, the measure of current sensed in the conductor by the current transformer and the measure of voltage of the conductor.
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