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김선구(Kim Sun-Koo) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
There are many equipments as short circuit generator, induction motor, sequence timer, exciter, back up breaker and making switch for the short circuit test. Especially back up breaker and making switch are very important equipments of these. A role of a back up breaker is to break high-voltage and high-current for short circuit test and a making switch is to make the test current. The making switch should be operated always same speed/time and should be kept electrical-mechanical characteristics. Recently purchasers request to be tested the short circuit test by IECEE which should be adjusted within ±0.23㎳ of making angle. Now the hydraulic making switch is a unique switch for satisfaction of the above condition. This study introduces weighty parts, structure and principle of hydraulic making switch.
ANSI/IEEE IEC 規格에 따른 變壓器의 短絡强度試驗의 比較
김선구(Sun-Koo Kim),김선호(Sun-Ho Kim),김원만(Won-Man Kim),나대열(Kim Dae-Ryeol),노창일(Chang-Il Roh),이동준(Dong-Jun Lee),정흥수(Heung-Soo Jung) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Generally Short Circuit Test of transformers are tested according to IEEE std C57.12.00-2000, IEC 60076-5(2000-07), ES148(1998.6.26) or KS C4309(2003). But ES148 (1998.6.26) is same as IEEE std C57. 12.00-2000 and KS C4309(2003) is revising coincidence with IEC 60076-5 (2000 ~07). On this study condition of the transformers before short circuit test, calculation method for test current peak value, tolerance on the asymmetrical peak and r.m.s value, short circuit testing procedure, number of short circuit test, duration short circuit test, and detection of faults and evaluation of short circuit test result will be compared with ANSI and IEC.
ANSI/IEEE와 IEC 표준에 따른 변압기의 단락강도시험방법 비교고찰
김선호(Sun-Ho Kim),김선구(Sun-Koo Kim),김원만(Won-Man Kim),나대열(Dae-Ryeol La),박영기(Young-Ki Park),이동준(Dong-Jun Lee),정흥수(Heung-Soo Jung) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
Generally Short Circuit Test of transformers are peformed according to IEEE std C57.12.00:2006, IEC 60076-5:2006, KS C 4309:2003 and ES by KEPCO etc. Among these various standards IEC and IEEE standards are the basis of other standards as ES refers to IEEE std C57. 12.00 and KS C4309 is modification of IEC 60076-5. Therefore this study tries to compare these two main standards on the short circuit test conditions of the transformers before short circuit test, calculation method for test current peak value, tolerance on the asymmetrical peak and r.m.s value, short circuit testing procedure, number of short circuit test, duration short circuit test, and detection of faults and evaluation of short circuit test result.