Bilateral comparison of voltage transformer measuring systems of NCHVM and PTB |
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| Xue Wang, Enrico Mohns, Chun Yang Jang, Peter Raether, Hong Yang |
- Abstract:
- An intercomparison of voltage transformer calibration systems was performed between National Center For High Voltage Measurement (NCHVM) and Physikalisch-Technische Bundesanstalt (PTB) in order to confirm their measurement capabilities. Two voltage transformers were used as travelling standards with transformer ratios of 10 kV / 100 V and (110 kV / √3) / 100 V at a frequency of 50 Hz and at ambient temperatures of 23 °C ± 3 °C. The measurements has been performed at test points varying from 20% to 120% of the rated voltage. For the ratio of 10 kV / 100 V the test results differ by no more than 4 parts in 106 for the voltage ratio and 4 µrad for the phase displacement. For the ratio of (110 kV / √3) / 100 V the results agree within 2 parts in 106 for the voltage ratio and 9 µrad for the phase displacement.
- Keywords:
- voltage transformers, travelling standard, bilateral comparison, uncertainty
- Download:
- IMEKO-TC4-2019-014.pdf
- DOI:
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