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교류 저전압 표준용 교류-직류 변환기의 입력임피던스 평가기술 개발
權聖遠(Sung-Won Kwon),鄭在甲(Jae Kap Jung),李相和(Sang-Hwa Lee),金紋奭(Myungsoo Kim),金漢俊(Han Jun Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.2
An AC-DC transfer standard(TS) is used for the AC voltage standard in the range of 2 ㎷ to 1000 V below 1 ㎒. Micro-potentiometer(μPot) is used to evaluate the ac-dc transfer difference(ADD) of the TS below 200 ㎷ range. The ADD of the TS were changed by the loading effect caused from the input impedance change of the TS depend on frequency. An input impedance evaluation technique of the TS using μPot has been developed.
權聖遠(Sung-Won Kwon),鄭在甲(Jae-Kap Jung),李相和(Sang-Hwa Lee),金紋奭(Mun-Seog Kim),金明壽(Myungsoo Kim) 대한전기학회 2006 전기학회논문지C Vol.55 No.6
Standard current transformer(CT) with the nominal ratio errors in the range of - 10 % to + 10 % has been developed. Linearity of the CT ratio error measuring system (CT comparator) has been tested by using wide ratio error standard current transformer(WRE CT). The developed WRE CT can be used to evaluate the linearity of the CT comparator by comparing both the theoretical values and experimental values of the WRE CT. The developed method has been successfully applied for calibration and correction in the CT comparator belonging to industry.