Bilateral comparison of voltage transformer measuring systems of NCHVM and PTB

• 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:

  _unreg_tc4-2019.014

Event details:

• IMEKO TC:

  TC4
• Event name:

  TC4 Symposium 2019
• Title:

  23^rd IMEKO TC4 Symposium

• Place:

  Xi'an, CHINA
• Time:

  17 September 2019 - 20 September 2019