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arXiv · 1409.5700

On the calibration of direct-current current transformers

Luca Callegaro·Cristina Cassiago·Enrico Gasparotto
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Abstract

Modern commercial direct-current current transformers (DCCT) can measure currents up to the kA range with accuracies better than 1E-5. We discuss here a DCCT calibration method and its implementation with commercial instruments typically employed in low resistance calibration laboratories. The primary current ranges up to 2 kA; in the current range below \SI{100}{\ampere} the calibration uncertainty is better than 3E-7. An example of calibration of a high-performance DCCT specified for primary currents measurement up to 900 A is discussed in detail.

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Luca Callegaro, Cristina Cassiago, Enrico Gasparotto. 2014-09-19. On the calibration of direct-current current transformers. https://doi.org/10.1109/tim.2014.2359812

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