Affiliations: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
Correspondence:
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Corresponding author: Xiang-Chao Li, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China. E-mail:lxcfanglei@163.com
Abstract: Surge protective device is widely used in the lightning
protection of electric appliances. In order to meet the withstand voltage
level of those protected devices, multi-level surge protective devices are
applied in the practical situation. Therefore, the optimal choice of
decoupling elements is vital to realize the energy coordination between
multi-level surge protective devices. This paper intends to expatiate on the
process of coordination between these low-voltage multi-level surge
protective devices, which is based on the transmission line theory. Through
a series of experiments, we found the transmission line theory could be
applied to describe the transmission process of lightning wave in the
low-voltage system; When a 5-meter-long wire whose inductance is 5.6
micro-henry was used as the decoupling element, the average shunt ratio
between multi-level surge protective device in the first level and
multi-level surge protective devices in second was about 0.9: 0.1; upon the
experimental results, it was proposed that two voltage limiting type
multi-level surge protective devices had a better performance to clamp the
overvoltage, which has a certain reference value in the practical
application.
Keywords: Surge protective device, transmission line theory, energy coordination
