http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
노즐 용삭을 이용한 SF6 가스차단기의 압력상승에 관한 연구
안희섭(Heui-sub Ahn),정영우(Y.W. Jeong),최종웅(Jongung Choi),오일성(I.S Oh) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
CFX-based arc modelling of SF6 gas circuit breaker taking account of the effects of nozzle ablation and the mixing process of PTFE vapour with SF6 has been carried out for self-blast circuit breaker with a moving contact. An additional PTFE mass concentration equation is solved with the mass, momentum, and energy equation for the SF6-PTFE vapour mixture. Mesh deformation method has been employed to implement the moving contact. The thermodynamic and transport properties of SF6 and PTFE vapour are calculated by the minimization of the Gibbs free enthalpy and all properties of the mixture are interpolated linearly through the user subroutine program. The distributions of pressure, temperature, PTFE mass concentration and velocity are discussed during the whole arcing time. The predicted pressure and arc voltage are compared with the test results.
이동식(D. S. LEE),이현욱(H. W. LEE),정영우(Y. W. Jeong),양홍익(H. I. Yang),안길영(K. Y. Ahn) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Recently, high reliability of electrical power system is required. Accordingly, for the protection of the power systems used circuit breakers are required high reliability. Nowadays general interruption time of circuit breaker is 3~5 cycle, but recently, to meet the needs of the high reliability, research on high speed circuit breaker has been made. The studies of high speed circuit breaker consist of research of high speed protection relay and high speed circuit mechanism. In this study, we proposed high speed mechanism with hybrid type mechanism, which consists of conventional spring mechanism and Thomson coil actuator.