NRC-PTB intercomparison of voltage transformer calibration systems for high voltage at 60 Hz, 50 Hz, and 16.66 Hz
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Bibliographic record
Abstract
An intercomparison of voltage transformer (VT) calibration systems was performed at the PTB high-voltage laboratory. A "portable" current-comparator-based VT calibration system of the NRC was compared with the PTB voltage-divider-based system, using a reference multiratio inductive VT as a transfer standard with voltage ratios of (110/2 kV)/(100/2 V) up to (400//spl radic/3 kV)/(100//spl radic/3 V) at frequencies of 16.66 Hz, 50 Hz, and 60 Hz. At frequencies of 50 Hz and 60 Hz with a resistive burden of 10 k/spl Omega/ and test voltages of 20% up to 120% of rated voltage, the test results of the two different methods at all ratios were found to differ by no more than 15 parts in 10/sup 6/ for the voltage ratio and 30 /spl mu/rad for the phase displacement. For the ratio (110/2 kV)/(100/2 V) at 16.66 Hz, the results agreed within 15 parts in 10/sup 6/ for the voltage ratio and 50 /spl mu/rad for the phase displacement.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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