Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Lightning Impulse Current Characteristics of ZPCCD-based Varistors

ZPCCD계 바리스터의 뇌충격전류특성

  • 박종아 (동의대학교 전기공학과) ;
  • 김명준 (동의대학교 전기공학과) ;
  • 유대훈 (동의대학교 전기공학과) ;
  • 남춘우 (동의대학교 전기공학과)
  • Published : 2004.04.24
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Abstract

The microstructure, electrical, and clamping voltage characteristics of ZPCCD-based varistors were investigated at sintering time of 2 and 3 h. The average grain size and density of varistor were increased from 15.2 to 19.0 and from 5.5 to 5.6 $g/cm^3$ with sintering time, respectively. The nonlinear exponent was 65.4 for 2 h and 37.4 for 3 h, and leakage current was 0.54 ${\mu}A$ for 2 h and 0.67 ${\mu}A$ for 3 h. The dissipation factor was 0.0397 for 2 h and 0.0457 for 3 h. The clamping voltage ratio at surge current($8/20{\mu}s$) of 10~300 A was increased in the range of 1.56~2.17.

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