Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1993-04-16
1994-08-09
Snow, Walter E.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324141, 324140R, 324126, 324127, G01K 104
Patent
active
053369912
ABSTRACT:
An apparatus and method for measuring electrical energy and quadergy and for performing line frequency compensation includes a compensation integrated circuit for adjusting the determined reactive load quadergy, based on variations between the actual line frequency and the rated line frequency of the meter. Reactive load quadergy is determined by phase-shifting the line voltage by a fixed time interval, based on the rated line frequency of the meter. The determined reactive load quadergy is adjusted to compensate for variations in line frequency. Because the determined reactive load quadergy is output by an electric meter as a continuous pulse train, adjustment to the determined reactive load quadergy is performed by adding or subtracting state changes from the pulse train and then registering the adjusted reactive load quadergy.
REFERENCES:
patent: 5229713 (1993-07-01), Bullock et al.
patent: 5298854 (1994-03-01), McEachern
Atherton Kenneth W.
Bullock Donald F.
Chevalier Gerard
Crittenden Curtis W.
Elmore David D.
Bowser Barry C.
General Electric Company
Snow Walter E.
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