International comparison of current transformer calibration systems up to 10 kA at 50 Hz frequency

• Published in: 2016 Conference on Precision Electromagnetic Measurements (CPEM 2016) pp. 1 - 2
• Main Authors: 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., Cayci, H., Hallstrom, J., Suomalainen, E-P
• Format: Conference Proceeding Journal Article
• Language: English
• Published: IEEE 01-07-2016
• Subjects: AC current ratio; Atmospheric measurements; Calibration; comparison; Conferences; Current measurement; Current transformers; current transformers (CT); Devices; Electromagnetic measurement; high current; instrument transformers; Laboratories; Measurement uncertainty; Metering; Metrology; Particle measurements; phase displacement; ratio error; Transformations; Transformers
• DOI: 10.1109/CPEM.2016.7540493
• EISSN: 2160-0171

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.