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Averaging in an intelligent electronic device

  • US 7,920,976 B2
  • Filed: 03/26/2008
  • Issued: 04/05/2011
  • Est. Priority Date: 03/27/2007
  • Status: Active Grant
First Claim
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1. An intelligent electronic device comprising:

  • a metering module that obtains values of a parameter of an alternating current (AC) electrical service over a predetermined number of AC cycles of an AC signal delivered by the AC electrical service; and

    a processing module that processes the values obtained by the metering module, the processing module operative to average a plurality of the values of the parameter over the predetermined number of AC cycles,wherein the processing module determines the average by determining a plurality of sets of values of the parameter, each set of values comprising values of the parameter obtained at temporally similar points in each of the plurality of AC cycles and calculating the average value of the parameter for each of the plurality of sets of values.

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