Abstract：With the ever-increasing power system capacity of modern ships, fault current level has increased sharply, the action time of electromagnetic tripping protection device can’t meet the needs of protection. A GaInSn liquid metal Arc-trigger with merits of fast responding speed, high reliability and self-healing property is proposed which uses arc voltage as actuating signal. A 1 kA prototype has been developed for temperature-rise and pre-arcing tests, the results show that the temperature rise of electrode under rating current is 43 K and the limitation of current carrying ability is mainly magnetic force; the pre-arcing time varies inversely to di/dt, the arc ignited at 1.09 ms under 10.3 A/μs rise rate and has a good reusability. The GaInSn liquid metal arc-trigger can be used in hybrid current limiting circuit breaker to the improvement of reliability and current limiting characteristics.
李枫, 庄劲武, 武瑾, 李红伟, 方伟. 基于液态金属自收缩效应的故障电流触发器[J]. 电工技术学报, 2017, 32(17): 95-101.
Li Feng, Zhuang Jinwu, Wu Jin, Li Hongwei, Fang Wei. Liquid Metal Arc-Trigger Based on Self-Pinch Effect. Transactions of China Electrotechnical Society, 2017, 32(17): 95-101.
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2017, Vol. 32 
