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노즐 용삭을 고려한 복합 소호형 차단기의 압력 상승 계산
배채윤(Cae-Yoon Bae),안희섭(Heui-Sup Ahn),정영우(Yong-Woo Jung),최종웅(Jongung Choi),오일성(Il-Sung Oh) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Pressure rise 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 SF. . The amount of the ablated mass of a nozzle is assumed to be proportional to the arc 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.