Patent ID: 6429637
Filing Date: 2002-08-06
Classification: G01R

Abstract:
An electronic power meter for metering the consumption of electrical energy in polyphase power lines, comprising:at least one current channel defined by a passive current transformer with a primary and secondary winding having line current signals associated therewith; at least one voltage channel associated with a respective current channel and having phase voltage signals associated therewith; a processor with a sequential sampling analog to digital converter for digitizing phase voltage and line current signals on associated current and voltage channels, wherein said processor initially samples said current channels for a particular sample and following a selected time delay samples the associated voltage channel, said processor samples said current channel a second time following the sampling of said voltage channel for said particular sample, and stores the resulting digitized signals for use in performing a weighted average, the amount of time delay and the weights for averaging is determined on the basis of amount of phase lag that is to be compensated.