Claims
- 1. A method of displaying power quality information comprising the steps of:
- sampling a plurality of electrical inputs to obtain a plurality of sequences of samples, wherein said plurality of electrical inputs comprises a voltage input and a current input;
- deriving a total harmonic distortion signal from said plurality of sequences of samples;
- deriving a total power signal from said plurality of sequences of samples;
- deriving a reactive power signal from said plurality of sequences of samples;
- displaying a three axes power quality graph, wherein total power is a first axis of said graph, reactive power is a second axis of said graph, and total harmonic distortion is a third axis of said graph; and
- displaying a vector superimposed on said graph, wherein said vector has coordinates along said first, second, and third axes corresponding to parameters of said total harmonic distortion signal, total power signal, and reactive power signal at a selected time.
Parent Case Info
This is a Division of application Ser. No. 08/245,779 filed May 19, 1994, now abandoned.
US Referenced Citations (33)
Divisions (1)
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Number |
Date |
Country |
Parent |
245779 |
May 1994 |
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