GB50057-2010 建筑物防雷设计规范(6)

目次

1总则............................................................................................................................................12术语..........................................................................................................................................2

3建筑物的防雷分类......................................................................................................................94建筑物的防雷措施.....................................................................................................................11

4.1基本规定..........................................................................................................................11

4.2第一类防雷建筑物的防雷措施.....................................................................................12

4.3第二类防雷建筑物的防雷措施......................................................................................22

4.4第三类防雷建筑物的防雷措施......................................................................................30

4.5其他防雷措施..................................................................................................................35

5防雷装置.....................................................................................................................................39

5.1防雷装置使用的材料.....................................................................................................39

5.2接闪器..............................................................................................................................40

5.3引下线..............................................................................................................................44

5.4接地装置.........................................................................................................................45

6防雷击电磁脉冲.........................................................................................................................48

6.1基本规定..........................................................................................................................48

6.2防雷区和防雷击电磁脉冲.............................................................................................48

附录A建筑物年预计雷击次数....................................................................................................66

附录B建筑物易受雷击的部位..................................................................................................69附录C接地装置冲击接地电阻与...............................................................................................71

附录D滚球法确定接闪器的保护范围(略)................................................................................73

附录E分流系数kc.....................................................................................................................73附录F雷电流................................................................................................................................75

附录G环路中感应电压和电流的计算.......................................................................................78

附录H电缆从户外进入户内的屏蔽层截面积...........................................................................81附录J电涌保护器.........................................................................................................................83

J.1用于电气系统的电涌保护器.........................................................................................83

J.2用于电子系统的电涌保护器.........................................................................................88