Affiliations: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
Correspondence:
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Corresponding author: Xiangchao Li, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Information Science and Technology, 210044 Nanjing, Jiangsu, China. E-mail:000420@nuist.edu.cn
Abstract: In terms of the fuse breaking performance in
8/20 μ s 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
8/20 μ s waveform of lightning current. The test conforms to let-through
energy I2t theory when the fuse melting current under power frequency is
below 5 A; 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 5 A.
Keywords: Lighting current, fuse, let-through energy, ponderomotive force
