Ac-dc transfer standard shunts for frequencies up to 1 MHz

U. Pogliano, C.G. Bosco, M. Lanzillotti, D Serazio

Abstract

A new type of coaxial shunt for high frequency ac-dc current transfer standards has been designed. The structure of the shunts with nominal current from 100 mA to 5 A are made of a disk with two coaxial conductive layers in one side. SMD resistors are soldered in parallel between the two layers. Two conductive screens are applied in both side of the disk. In order to reduce stray effects, the structure has ideally no common magnetic interaction between the input current and the output voltage and practically a very low section where the magnetic field is confined, so allowing a flat response in a wide frequency range.

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TC4 - Measurement of Electrical Quantities

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