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.
Cite
@article{arxiv.1409.5700,
title = {On the calibration of direct-current current transformers},
author = {Luca Callegaro and Cristina Cassiago and Enrico Gasparotto},
journal= {arXiv preprint arXiv:1409.5700},
year = {2016}
}
Comments
Accepted for publication in IEEE Trans. Instr. Meas. Copyright IEEE