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Electronic electricity meter configured to correct for transformer inaccuracies

  • US 20020180420A1
  • Filed: 06/01/2001
  • Published: 12/05/2002
  • Est. Priority Date: 06/01/2001
  • Status: Active Grant
First Claim
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1. An electronic electricity meter comprising:

  • voltage sensors configured to generate measurements of voltage at voltage elements;

    current sensors configured to generate measurements of current through current elements;

    a microcomputer coupled to the current and voltage sensors and configured to control operation of said meter; and

    a memory coupled to said microcomputer and configured to store configuration and metering data, said memory further comprising calibration constants to compensate for instrument transformer ratio and phase angle errors, said microcomputer configured to use said calibration constants, when so instructed, to correct for measurement errors that occur based upon instrument transformer ratios and phase angles, to correct metering quantities calculated by said microcomputer.

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