VA metering in polyphase systems

Details VA metering in polyphase systems VA metering in polyphase systems

2007-10-09

2010-06-29

Nghiem, Michael P. (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C324S107000, C324S141000

Reexamination Certificate

active

07747400

ABSTRACT:
An arrangement includes an A/D converter and a processing circuit. The A/D converter is configured to generate digital samples of voltage and current waveforms in a polyphase electrical system. The processing circuit is operably coupled to receive the digital samples from the A/D converter. The processing circuit is further configured to combine a value substantially equal to two times the magnitude of the phase A current sample with the phase C current sample to generate a first value, and generate a VA calculation using the first value and at least one other value. The processing circuit is further configured to provide information representative of the VA calculation to one of a group consisting of a display, a communication circuit, and a billing calculation unit.

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