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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Dynamic Electrical Breakdown Characteristics of Liquid Nitrogen

액체 $N_2$의 동적 절연파괴 특성

  • 김영석 (경상대학교 공과대학 전기공학과) ;
  • 정종만 (경상대학교 공과대학 전기공학과) ;
  • 곽민환 (경상대학교 공과대학 전기공학과) ;
  • 백승명 (경상대학교 공과대학 전기공학과) ;
  • 장현만 (경상대학교 공과대학 전기공학과) ;
  • 김상현 (경상대학교 공과대학 전기공학과)
  • Published : 1998.06.01
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Abstract

Electrical breakdown characteristics of liquid nitrogen(LNd used as both coolant and insulator for high $T_c$ superconductor system is very important. This paper presents dynamic breakdown characteristics of liquid nitrogen by quench penomena of thermal bubble under high electric field. As the result, the breakdown mechanism of $LN_2$ depends on thermal bubble effect. The breakdown voltage decreases slightly with increasing heating. In the Electrode arrangement, electrical breakdown voltage of horizontal arrangement appears lower than that of vertical arrangement.

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