Precision Characterisation of Current Transformers and Shunts in the Audio Frequency Range

This paper presents a technique to compare two current transformers, or a current transformer and ac current shunts, with an uncertainty better than 1 uA/A and 1 urad at audio frequencies. Examples of such a comparison at frequencies from 10Hz to 10kHz are given. Due to its low uncertainty, the desc...

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Bibliographic Details
Main Authors: Budovsky, Ilya, Marais, Louis, van Beveren, Laurens Willems
Format: Conference Proceeding
Language:English
Subjects:
AC current
Amplifiers
Current measurement
current shunt
current transformer
Current transformers
Frequency measurement
measurement
Measurement uncertainty
Resistors
Voltage measurement
Online Access:Request full text
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Description
Summary:This paper presents a technique to compare two current transformers, or a current transformer and ac current shunts, with an uncertainty better than 1 uA/A and 1 urad at audio frequencies. Examples of such a comparison at frequencies from 10Hz to 10kHz are given. Due to its low uncertainty, the described technique made it possible to accurately measure critical parameters such as common-mode dependence of a current transformer and impedance variation of current shunts with ac current applied.
ISSN:2160-0171
DOI:10.1109/CPEM.2018.8501022