Device for measurement of electrical energy comprising a multiplexer
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United States of America Patent
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Aug 13, 1996
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N/A
app pub date -
May 19, 1995
filing date -
Jun 1, 1994
priority date (Note) -
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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.
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