Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2008.09a
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- Pages.69-71
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- 2008
Current Range Extension of Current Transformers by Using Absolute Evaluation Technique and Two Different Current Transformers
전류변성기 절대 평가 기술과 전류변성기 두 대를 이용한 전류 범위 확장
- Kim, Yoon-Hyoung (Chungnam National University) ;
- Han, Sang-Gil (Chungnam National University) ;
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Jung, Jae-Kap
(Korea Research Institute of Standards and Science)
;
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Han, Sang-Ok
(Chungnam National University)
- Published : 2008.09.25
Abstract
We have developed a current range extension method to obtain the ratio error and phase displacement of a current transformer (CT) by using absolute evaluation method and two different CTs. The method was applied to CTs under test with the current ratios of the range of 5,000 A / 1 A - 20,000 A / 1 A. The ratio error and phase displacement of the CT under test obtained in this study are consistent with those measured at the national institute in Germany using the same CT under test within an expanded uncertainty (k = 2) in the overall current ratios.
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