전기학회논문지P (The Transactions of the Korean Institute of Electrical Engineers P)

  • 제58권1호
  • /
  • Pages.72-78
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  • 2009
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  • 1229-800X(pISSN)
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  • 2586-7792(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

전류변성기 두 대와 절대 평가 기술을 이용한 2차 전류 범위 확장

Secondary Current Range Extension of Current Transformers by Using Two Different Current Transformers and Absolute Evaluation Technique

  • 발행 : 2009.03.01
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초록

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 in 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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참고문헌

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  9. 한국표준협회, "측정 결과의 불확도 추정 및 표현을 위한 지침", KS A 3000. 2005
  10. Calibration of EPRO Current Transformer (Type : NCD 20000d, s/n : 2/06/0006) in PTB (Calibration mark: 2183 PTB 06, Calibration of 2006-07-20)