US PATENT SUBCLASS 324 / 86
.~.~ Polyphase (e.g., phase angle, phase rotation or sequence)

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

76.11  DF  MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46}
76.77  DF  .~ Phase comparison (e.g., between cyclic pulse voltage and sinusoidal current, etc.) {11}
86.~.~ Polyphase (e.g., phase angle, phase rotation or sequence)

DEFINITION

Classification: 324/86

(under subclass 83) Subject matter in which one of the electric voltages or currents is obtained from a polyphase source.

(1) Note. In order that a disclosure be classified in this subclass, the polyphase source must be significantly related to the phase measurement. For example, the average phase angle of three phases of a three phase circuit may be compared with the phase of a single phase circuit. A polyphase source which supplies only a single phase voltage or current to the measuring equipment, without more, is not significantly related to the phase measurement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

108, for the measurement of positive, negative and zero sequence components of a three phase system.