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International Comparison of Current Transformer Calibration Systems up to 10 kA at 50 Hz Frequency

2016    Draxler, K.; Styblikova, R.; Rietveld, G.; van den Brom, H.; Schnaitt, M.; Waldmann, W.; Dimitrov, E.; Cincar-Vujovic, T.; Paczek, B.; Sadkowski, G.; Crotti, G.; Martin, R.; Garnacho, F.; Blanc, I.; Kampfer, R.; Mester, C.; Wheaton, A.; Mohns, E.; Bergman, A.; Hammarquist, M.; Hammarquist, M.

Current transformers (CTs) are precision devices that scale high currents down to values that can be easily handled by measurement equipment. To support CT applications in revenue metering, a comparison on AC current transformer calibration systems was performed among 15 European national metrology institutes using a precision CT as the travelling device. The first comparison results for the transformation ratios (4, 5, 6, 8, 10) kA/5 A of the travelling CT at nominal burden of 5 VA and 15 VA indicate good agreement between the participating laboratories. The main differences are found for phase displacement, at least partly caused by the instability of the traveling standard.