Helko E. van den Brom, Leendert Jol, Gert Rietveld, and Eddy So, “High-Current AC Current Transformer Calibration Using an Automated Sampling System”, Submitted for publication in the Proceedings of the 2012 Conference on Precision Electromagnetic Measurements, Washington, US (2012).
A measurement setup is developed for the accurate ratio measurement of AC current transformers (CTs) for primary currents up to 5 kA. A unique property of the system
is the use of digitizers for sampling of the secondary current signals and step-down transformers with a large number of current ratios. This allows for accurate comparison of CTs even when their nominal ratios are not equal.
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