The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Development of a Calculable Potential Transformer with Wide Ratio Error

광범위 비오차를 갖는 계산형 전압변성기의 개발

  • 권성원 (한국표준과학연구원 기반표준부 전자기센터) ;
  • 정재갑 (한국표준과학연구원 기반표준부 전자기센터) ;
  • 이상화 (한국표준과학연구원 기반표준부 전자기센터) ;
  • 김명수 (한국표준과학연구원 표준보급부)
  • Published : 2008.06.01
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Abstract

A calculable potential transformer(PT) with nominal ratio error in wide range of -10% to +10% has been developed on basis of theoretical calculation of ratio error by the number of windings. The developed PT can be used to evaluate the linearity and accuracy of the PT comparator by comparing both the theoretical and experimental values of the PT which have exactly same ratio errors in nominal and calculated values. The PT has been applied for calibration and correction of the PT comparator up to wide ratio error range of -10% to +10%. This portable PT is very convenient to carry to the power industry for the on-site calibration of the PT comparator.

Keywords

References

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  7. Certificate of the PT comparator, Zera model WM 303U, PTB, 2005