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Self-blast형 SF. 가스 차단기의 노즐용삭 분석
정영우(Young-Woo Jeong),배채윤(C. Y. Bae),안희섭(H. S. Ahn),최종웅(J. W. Choi),오일성(I. S. Oh) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In our study, the PTFE nozzle ablation in the high-voltage self-blast type SF. gas circuit breaker was investigated. The test circuit breaker has the structure that the pin electrode is moving and the pressure reservoir volume and the dimension is almost same as commercial 145㎸ 40㎄ circuit breaker for similar result in real circuit breaker. The variation of current and arcing time was the range of 36㎄<SUB>rms</SUB>(symmetry) - 40㎄<SUB>rms</SUB>(asy㎜etry) and 10-16 ms. From the measured data, the tendecy of the mass loss of the nozzle to current load and arc energy was estimated. In this process, the distance from the arc to nozzle(PTFE) surface, area which was exposed to arc and stroke contour was considered. These results will be used to enhance the accuracy of the computational fluid dynamics analysis in circuit breaker and estimate the residual life time of a circuit breaker.