Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Dynamic Electrical Breakdown Characteristics of Cryogenic Liquid

극저온 액체의 동적 절연파괴 특성

  • 김상현 (경상대학교 공과대학 전기공학과) ;
  • 김현희 (경상대학교 공과대학 전기공학과) ;
  • 김영석 (경상대학교 공과대학 전기공학과) ;
  • 정종만 (경상대학교 공과대학 전기공학과) ;
  • 정순용 (경상대학교 공과대학 전기공학과)
  • Published : 1998.04.01
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Abstract

Electrical breakdown characteristics of liquid nitrogen($LN_2$) taking into consideration for application of high $T_c$ superconductor is very important. Also $LN_2$ will be used as both coolant and insulator in superconducting generator. In this paper, we investigated ac breakdown characteristics of cryogenic nitrogen gas above a $LN_2$ for rod-to plane electrode configuration. As result the breakdown mechanism of $LN_2$is dependence on bubble effect. And breakdown voltage is a ratio on bubble s size but electrodes arrangement is to make no difference. The breakdown voltage decreases slightly with increasing flow velocity, it again decreases abruptly with increasing flow velocity. These results were interpreted as the within pressure of rod electrode and Maxwell force.

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References

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