Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Development of 25.8kV 25kA Gas Circuit Breaker Using Thermal-Expansion Principle (I)

25.8kV 25kA 열팽창분사식 가스차단기 개발에 관한 연구 (I)

  • Song, K.D. (Korea Electrotechnology Research Institute) ;
  • Park, K.Y. (Korea Electrotechnology Research Institute) ;
  • Shin, Y.J. (Korea Electrotechnology Research Institute) ;
  • Chang, K.C. (Korea Electrotechnology Research Institute) ;
  • Kim, K.S. (Jinkwang Co., R&D Department) ;
  • Kim, J.G. (Jinkwang Co., R&D Department)
  • 송기동 (한국전기연구소 개폐장치연구팀) ;
  • 박경엽 (한국전기연구소 개폐장치연구팀) ;
  • 신영준 (한국전기연구소 개폐장치연구팀) ;
  • 장기찬 (한국전기연구소 개폐장치연구팀) ;
  • 김귀식 ((주)진광 기술연구소) ;
  • 김진기 ((주)진광 기술연구소)
  • Published : 1995.07.20
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Abstract

In order to develop a medium voltage class gas circuit breaker by our own technology, we designed and manufactured the model interrupters using the hybrid arc extinguishing principle which adopts the thermal expansion principle in the large current region and the arc rotation principle by permanent magnet in the small current region. As the results of the first year research out of three years' research period, the main design parameters such as the volume of thermal expansion chamber, the distance between fixed contact and nozzle, the length of nozzle throat, the nozzle expansion angle and the magnitude of permanent magnet etc. have been determined. 4 types of model interrupters have been designed and manufactured considering the main design parameters. The 25kA short-circuit test and capacitive current breaking test have been performed for the model interrupters and the test results analyzed to improve the model interupters.

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