基于液态金属自收缩效应的故障电流触发器

doi:10.19595/j.cnki.1000-6753.tces.161497

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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.

Key words： Liquid metal arc-trigger fault current self-pinch effect pre-arcing characteristics temperature-rise characteristics

Received: 18 September 2016 Published: 14 September 2017

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TM562

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	Li Feng
	Zhuang Jinwu
	Wu Jin
	Li Hongwei
	Fang Wei

Cite this article:

Li Feng,Zhuang Jinwu,Wu Jin等. Liquid Metal Arc-Trigger Based on Self-Pinch Effect[J]. Transactions of China Electrotechnical Society, 2017, 32(17): 95-101.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161497 OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I17/95

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