雷击附近的格栅型空间屏蔽效能试验  

Shielding Effectiveness Test of Gridding Frame Space nearby Lightning Strokes

作　　者：任晓明[1,2] 傅正财[1] 黄晓虹[2] 孙伟[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海市防雷中心,上海201615

出　　处：《低压电器》2010年第9期13-15,共3页Low Voltage Apparatus

基　　金：上海市科学技术委员会世博科技专项基金资助项目(08dz0580900)

摘　　要：为测量雷击建筑物附近时的格栅型空间屏蔽效能,研制了一套屏蔽效能测试系统,该系统由磁场发生器和磁场测量系统组成。对0.5、0.25、0.125 m网格宽度和金属板进行试验。试验结果表明,屏蔽效能系数随着网格宽度的减小变大,但变化速度逐渐缓慢。A set of shielding effectiveness testing system,which was composed of an impulse magnetic field generator and magnetic field measuring system,was developed to measure the shielding effectiveness of gridding frame nearby lightning strokes.Under such condition,different experiments were carried out with the grid width of 0.5,0.25 and 0.125 m and various types of metal plates.The test results showed that the shielding effectiveness coefficient increased with the decrease of grid size,but the increase speed would gradually slow down.

关 键 词：格栅 屏蔽效能 探测线圈 网格宽度 

分 类 号：TM862[电气工程—高电压与绝缘技术]