Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

A Technique of Deterioration Diagnosis for ZnO Element by Analyzing the 3rd order Harmonics- of Leakage Current

누설전류의 제3고조파 분석에 의한 ZnO소자의 열화진단기술

  • Lee, Bok-Hee (Dept. of Electrical Engineering, Inha University) ;
  • Kang, Sung-Man (Dept. of Electrical Engineering, Inha University)
  • 이복희 (인하대학교 공과대학 전기공학과) ;
  • 강성만 (인하대학교 공과대학 전기공학과)
  • Published : 1998.07.20
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Abstract

This paper describes the technique of deterioration diagnosis for ZnO element. Due to the non-linear resistance of ZnO block, the total leakage current contains harmonics when arrester deteriorated. The most significant harmonics is the 3rd order component. So, it can be used as an indicator of the arrester condition. An iron core, which has a very high relative permeability, is used for increasing detection sensitivity and the 3th order harmonics of leakage current was detected by band-pass circuit. And we have verified the reliability and performance of the sensing device through several laboratory tests.

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