独立防雷装置间隔距离计算公式

Distance Formulas of Independent Lightning Protection Device

保证独立防雷装置的间隔距离对于雷电防护十分重要。为了使间隔距离计算公式更符合实际情况与提升防雷装置的安全性,根据雷电反击机制,分别推导出防护首次正极性雷击、首次负极性雷击和首次负极性以后雷击3种典型雷击反击危害的间隔距离公式,并求其公共解,得出能够同时防护3种典型雷击反击危害的公共间隔距离公式。通过对比发现《建筑物防雷设计规范》中的间隔距离计算公式存在着不足。经分析和论证,本文得出的公共间隔距离公式更为合理和安全。

Ensuring the separation distance of independent lightning protection device plays a significant role in lightning protection activities.In order to make the separation distance calculating suitable for the actual situation and improve the safety,based on the formation mechanisms of lightning counterattack,the separation distance formulas for defending the lightning counterattack damage of the first positive lightning,the first lightning after the first negative lightning,and the first negative lightning are derived,and then develops the common separation distance formula that can defend simultaneously the lightning counterattack damage of all these three typical lightning by solving the common solution of those formulas.Comparing with these formulas,it is found that there are problems in the related design standards of lightning protection for buildings.The analysis indicates that those formulas are more reasonable and safe.