Device for measurement of electrical energy comprising a multipl

Details Device for measurement of electrical energy comprising a multipl Device for measurement of electrical energy comprising a multipl

1995-05-19

1996-08-13

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

364483, G01R 2106

Patent

active

055459811

ABSTRACT:
A device for measurement of electrical energy having current and voltage sensors 1, 2, a multiplexing circuit 8 and an analogue to digital converter 11. A microprocessor 9 controls the multiplexing circuit in order to supply the current and voltage signals alternately to the converter 11, the microprocessor 9 calculating the electrical energy at a moment in time using two values of the voltage situated around a current sample and using three samples of the current. By these means the time delay between samples of the voltage and current can be corrected.

REFERENCES:
patent: 4672555 (1987-06-01), Hart et al.
patent: 5086292 (1992-02-01), Johnson et al.
patent: 5168459 (1992-12-01), Hiller
patent: 5229713 (1993-07-01), Bullock et al.

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