中文摘要：

电弧放电行为是影响磁收缩型液态金属限流器限流特性的关键因素之一。为了研究其电弧放电特性,设计了带有透明观察窗的单隔板实验装置,采用LC振荡回路模拟短路电流,进行了不同通孔材料下电弧行为及其演变特性的实验研究。结果表明：液态金属电弧形态发展过程可分为起弧、电弧拉伸、弧区收缩及熄弧4个阶段。另外,通孔材料侵蚀所产生的强大气压会显著影响电弧行为及限流特性,一旦腔体内部气压过大,在燃弧后期易出现电弧在电流过零前熄灭的现象,不利于限流器对短路电流的限制。相较于石英玻璃,有机玻璃和GPO-3作为通孔材料可较大程度加快电弧发展、提高电弧电压,但其材料烧蚀严重影响限流器使用寿命,未来有必要继续探索新型耐高温材料。

英文摘要：

Arc discharge behavior is one of the key factors on current limiting characteristics of liquid metal current limiter based on magnetic pinch effect. A single separator experimental device with transparent viewing window is designed for the study of arc discharge characteristics. The short circuit current is simulated by LC oscillating test circuit. The experimental study on arc behavior and its evolution characteristics of different channel materials is finished. The experimental results indicate that the arc evolution can be classified into four stages including arc ignition, arc elongation, arc constriction and arc extinction. The arc behavior and current limiting characteristic are influenced by the strong pressure generated by ablation of channel materials. The arc will extinguish before current zero if the pressure is too large inside the enclosure. This phenomenon is not conducive to the current limiting of LMCL.Compared to quartz glass, plexi glass and GPO-3 can accelerate the development of arc and improve the arc voltage, but the arc ablation of them seriously affect the lifetime of LMCL. It is necessary to explore new thermo materials.