Experimental study of SF6 and its gas mixtures with CF4 for a high voltage gas circuit breaker
Both gas pressure buildup and post-arc current are vital factors to estimate the arc-quenching property of a circuit breaker.With a 126 kV puffer-type circuit breaker model designed and produced, experiments concentrating on characteristics of gas pressure nearby the nozzle throat and post-arc current are carried out then.SF6/CF4 gas mixtures are adopted as the arc-quenching medium, considering that employing of SF6 is limited in cold region.It is found that gas blow is more intense for SF6 compared with 50%SF6/50%CF4.And increasing θ(current phase corresponding to the moment contacts are separated) or reducing the filling gas pressure P result to increase of post-arc current, in which 50%SFd50%CF4 is higher than SF6 under the same conditions.
Gas circuit breaker Pressure buildup Post-arc current SF6 SF6/CF4
Kai ZHU Jianying ZHONG Xingwen LI Xu JIANG Hu ZHAO Shenli JIA
State Key Laboratory of Electrical Insulation and Power Equipment,Xi”an Jiaotong University,Xi”an,71 Henan Pinggao Electric Co.Ltd.No.22,Nanhuan East Road,Pingdingshan,467001,China
国内会议
武汉
英文
67-70
2013-11-16（万方平台首次上网日期，不代表论文的发表时间）