Pressure Rise in the Thermal Expansion Chamber With Arc

유부하시의 열팽창분사식 소호부내의 상승압력

  • 박경엽 (한국전기연구소 개폐장치연구팀) ;
  • 송기동 (한국전기연구소 개폐장치연구팀) ;
  • 신영준 (한국전기연구소 개폐장치연구팀) ;
  • 장기찬 (한국전기연구소 개폐장치연구팀) ;
  • 김귀식 (진광(주) 기술연구소) ;
  • 김진기 (진광(주) 기술연구소)
  • Published : 1995.07.20

Abstract

The interrupting capability of gas circuit breakers(GCB) are critically dependent on the pressure rise of the puffer cylinder or the thermal expansion chamber at current zero. Therefore it's very useful for the designers to know the pressure rise there at the design stage. Much effort has been done to predict the pressure rise in the puffer cylinder or the thermal expansion chamber in no-load condition. Thus, we now calculate it with reasonable accuracy with the simple programs coded by ourselves or with the commercial CFD packages. However, it has been still difficult problem to calculate it under the existence of arc. In this paper, we propose a method which can be used to predict the pressure rise in the thermal expansion chamber of thermal expansion type GCB. The method has been applied to the 25.8kV 25kA thermal expansion type model GCB and the calculated results have been compared with those from experiment.

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