UNCERTAINTY EVALUATION FOR THE COMPOSITE ERROR OF ENERGY METER AND INSTRUMENT TRANSFORMER

H. Kato, H. Imai

Abstract

Japan Electric Meters Inspection Corporation (JEMIC) is a Designated Institute of power and energy standards in Japan. All the energy meters for electricity trading in Japan are traceable to the National Standard in JEMIC. In industrial world, power is supplied by various voltage and current. However, the energy standard has been calibrated at 110 V and 100 V, for 5 A. Therefore, it is often used in combine with the instrument transformer. This paper describes the effect of composite error of instrument transformers to uncertainty evaluation of energy meters.

Keywords

AC power, AC energy, energy meter, instrument transformer

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IMEKO-WC-2012-TC4-P3.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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