摘要
选取雷击塔顶案例,通过计算,分析了在没有安装避雷器时、某相安装避雷器时、三相各自装设避雷器的情况下,杆塔耐雷水平的异同。从中得出结论:未安装避雷器时,各相均有发生闪络的可能性,某一相安装了避雷器后,能够很大程度上抬高临近杆塔的耐雷水平,三相均安装了避雷器之后,雷击不会造成安装避雷器杆塔的绝缘子发生闪络。但是当接地电阻值比较大时,避雷器吸收的能量也会比较大。
Based on the lightning tower as an example, through calculation, Compare the distinction of tower lightning tolerate level ( When the lightning arrester is not installed, A phase of installation of lightning arrester, Condition of three- phase are respectively installed arrester), Come to a decision:Lightning arrester installed without context,each phase has flashover may. When a phase installed a lightning arrester, can effectively raise the lightning withstand level of the immi- nent tower, three-phase are respectively installed arrester, Lightning does not cause insulator flashover arrester tower, but when the grounding resistance value is very large, the lightning arrester absorbed energy is larger.
出处
《电气开关》
2015年第1期45-48,共4页
Electric Switchgear
关键词
线路型避雷器
雷击塔顶
分析
line type lightning arrester
thunderstrike tower
analysis