Electronic solid state Q-hour meter and/or combination Q-hour an

Details Electronic solid state Q-hour meter and/or combination Q-hour an Electronic solid state Q-hour meter and/or combination Q-hour an

1983-03-16

1985-12-03

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Polyphase

324141, 324142, G01R 2106

Patent

active

045568430

ABSTRACT:
An electronic solid state Q-hour meter for measuring leading and lagging VARS quantities of electric power over a defined range of power factor. The Q-hour meter comprises first and second time division/pulse width-amplitude modulated/analog multiplier circuits. First and second current transformers are coupled to first and second phases of a multi-phase power supply to be monitored for deriving first and second analog circuit indicating signals which are supplied to respective analog current input terminals of the analog multipliers. First and second potential transformers are coupled across the first and second phases of the multi-phase power supply for deriving first and second analog voltage indicating signals that are supplied to respective input terminals of the first and second analog multiplier circuits. An electronic phase shifting circuit is connected intermediate the output of one of the potential transformers and the input terminal to one of the analog multiplier circuits for shifting the phase of the voltage indicating signal supplied thereto sixty degrees lagging. The outputs of the analog multiplier circuits are summed together to derive an output analog signal representative of a leading and lagging VARS quantities of electric power. By combining the solid state Q-hour meter with an electronic solid state kilowatt-hour meter a combination meter capable of measuring both kilowatt hours and Q-hours is provided.

REFERENCES:
patent: 4056775 (1977-11-01), Milkovic
patent: 4408283 (1983-10-01), Kovalchik et al.
Hope et al.; "Microprocessor-Based . . . "; Electrical Power and Energy Systems; vol. 3; No. 2; Apr. 1981; pp. 75-84.
Gambell, C. E.; "Q-Metering"; Distribution Magazine; Jan. 1970; pp. 9-12.

Affiliated with

Also associated with

Rating

Electronic solid state Q-hour meter and/or combination Q-hour an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic solid state Q-hour meter and/or combination Q-hour an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic solid state Q-hour meter and/or combination Q-hour an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1396574