Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2006.07b
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- Pages.677-678
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- 2006
Calculation of Pressure Rise of Self-blast Circuit Breaker considering Nozzle Ablation
노즐 용삭을 고려한 복합 소호형 차단기의 압력 상승 계산
- Bae, Cae-Yoon (Advanced technology team, Electro-technology R&D Center, LS Industrial Systems Co.,Ltd.) ;
- Ahn, Heui-Sup (Advanced technology team, Electro-technology R&D Center, LS Industrial Systems Co.,Ltd.) ;
- Jung, Yong-Woo (Advanced technology team, Electro-technology R&D Center, LS Industrial Systems Co.,Ltd.) ;
- Choi, Jong-Ung (Advanced technology team, Electro-technology R&D Center, LS Industrial Systems Co.,Ltd.) ;
- Oh, Il-Sung (Advanced technology team, Electro-technology R&D Center, LS Industrial Systems Co.,Ltd.)
- 배채윤 (LS 산전 전력연구소 선행기술 연구팀) ;
- 안희섭 (LS 산전 전력연구소 선행기술 연구팀) ;
- 정영우 (LS 산전 전력연구소 선행기술 연구팀) ;
- 최종웅 (LS 산전 전력연구소 선행기술 연구팀) ;
- 오일성 (LS 산전 전력연구소 선행기술 연구팀)
- Published : 2006.07.12
Abstract
Pressure risc is an important design factor and affects significantly on the characteristics of gas circuit breakers. For self-blast circuit breakers, the nozzle ablation plays important role in pressure-building up and should be properly considered for the accurate calculation. In this paper, the nozzle ablation is treated as a boundary condition and the pressure is calculated from mass fractions of PTFE and SF6. The amount of the ablated mass of a nozzle is assumed to be proportional to the are energy and the area of nozzle surface that directly touches arc. The calculation result is compared with measured data and shows good agreement with it.
Keywords