LABORATORY CURRENT TRANSFORMER BASED ON ROGOWSKI COIL

Luka Ferković, Damir Ilić, Ivan Leniček

Abstract

This paper cover the analysis and construction of current to voltage transducer based on Rogowski coil which satisfy the requirements of high-accuracy measurement of AC current (up to 20 A at power supply frequency, with the aiming uncertainty of 100 parts per million). Primary source of ac current uncertainty measured by this type of transducer is nonuniform density of turns which, in case of eccentricity or shift of primary conductor results in deviations of mutual inductance. Self capacitance and self resistance, temperature dependence of coil geometry and electromagnetic interferences affect the accuracy as secondary source of uncertainty. With respect of influencing parametres, the current transducer of aim accuracy can be realized.

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IMEKO-TC4-2008-106.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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