8/20μs雷电流冲击下熔断器开断性能

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Abstract

In terms of the fuse breaking performance in 8/20μs waveform of lightning current, the method that the fuse and surge protective device can work together is proposed. When the lighting current flows through the fuse, the instant temperature of its melt stream rises, and the fuse breaking action time is first analyzed. Meanwhile, when lighting current flows through a conductor, the influence of ponderomotive force on current-carrying conductor is then analyzed. Finally, a lead aluminum alloy fuse is selected, and the impulse test is carried out using 8/20μs waveform of lightning current. The test conforms to let-through energy I²t theory when the fuse melting current under power frequency is below 5A; while it conforms to the theory that the applied force vector sum of the transverse electric field and all directional drift electrons are ponderomotive force, when the fuse melting current under power frequency is above 5A.

Key words： Lighting current fuse let-through energy ponderomotive force

Received: 25 August 2014 Published: 30 December 2015

PACS:

TM862

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	Articles by authors
	Li Xiangchao
	Zhou Zhongshan
	Wang Chengfang
	Chen Rongjian
	Chen Puyang

Cite this article:

Li Xiangchao,Zhou Zhongshan,Wang Chengfang等. 8/20µs Lightning Current Impulse Fuse Breaking Performance[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 61-66.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I24/61

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