| DOI | Resolve DOI: https://doi.org/10.1109/TIM.2013.2253975 |
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| Author | Search for: Rietveld, Gert; Search for: Jol, Leendert; Search for: van den Brom, Helko E.; Search for: So, Eddy1 |
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| Affiliation | - National Research Council of Canada. Measurement Science and Standards
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| Format | Text, Article |
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| Subject | Alternating current; Current ratios; Digital sampling; Phase displacement; Phase error; Ratio error; Electric current measurement; Electric instrument transformers |
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| Abstract | A measurement setup is developed for the accurate ratio measurement of ac current transformers (CTs) for primary currents up to 5 kA. A unique property of the system is the use of high-quality digitizers for sampling of the secondary current signals and step-down transformers with different current ratios. This allows for accurate comparison of CTs even when their nominal ratios are not equal. The calibration results of the key components in the setup show that the sampling current ratio bridge has a ratio uncertainty of better than 2 μ A/A in magnitude and 0.8 μrad in phase for CT-under-test current ratios that do not differ by more than a factor of 5 from one of the ratios in the reference CT. The linearity of the bridge for input currents changing between 1% and 120% of nominal input current is better than 4 μ A/A in magnitude and 0.5 μ rad in phase. |
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| Publication date | 2013-04-22 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21270444 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 8d79cfd1-f093-482a-9533-7e6929d252be |
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| Record created | 2014-02-11 |
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| Record modified | 2020-04-22 |
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