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弱电防雷接地设施怎么做？

弱电防雷接地设施怎么做？

浏览：44次 | 提问时间： 08-03 05:53

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越曾繁华越寂寞 08-03 05:54

防雷接地完全可以利用建筑基础里的钢筋作为接地体，但是必须要将钢筋进行电气贯通焊接起来，并利用房屋柱子里的竖直钢筋做引下线，一直与屋面避雷设施连接。其次，很多要求把钢筋多引一条出来是用来做人工接地的，那是在使用建筑基础本身做接地无法达到规定电阻要求的时候才使用的，而且就算这样做了人工接地，效果要比利用建筑物本身基础做接地体差很多。所以直接用建筑物基础钢筋做接地体吧！注意：1.将基础钢筋进行良好的电气贯通，至少保证外围一圈是贯通的，跨接的材料推荐使用12MM的圆钢，焊接长度150MM左右。2.引下线平均间距要小于25米，如果房子不大，四角分别有一根引下线就好。3.每一处引下线推荐使用2根16MM的钢筋或者4根14MM的钢筋。一定保证引下线将接地体和屋面避雷装置连结到一体。

曾经我也单纯如纸 08-03 06:02

弱电设备防雷措施：（1）首先要完善弱电外部雷电防护，将绝大部分雷电流直接接闪引入地下泄散。（2）其次要阻塞沿电源线或*、信号线引入的过电压波。（3）第三限制钳位被保护设备上浪涌过压过流幅值在设备可承受的范围。这三道防线，相互配合，各行其责，缺一不可。希望能帮到您

小逗逗 08-03 06:11

(1)接闪器:根据建筑物的特点和防雷等级选用避霄网、避雷带或避雷针。在保护范围以外的突出金属物，如金属设备、金属管道、金属栏杆、广告牌、航空标志灯等，均应与防雷系统相焊接或卡接，构成统一的导电系统。屋顶的金属装饰物如金属旗杆或满足规范要求壁厚的金属屋面，均可作为接闪器。 (2)引下线:尽量利用建筑物钢筋混凝土柱内的对角主筋作为引下线，建筑物的消防梯、钢柱等金属构件也可作为引下线，但其各防雷部件之间均应连成电器通路。 (3)接地装置:设计接地装置时，当基础采用硅*盐水泥和周围土壤的含水量不低于4%，基础表面无防水层时，可利用基础内的钢筋作为接地装置(详后面的说明)，如果基础被塑料、橡胶、油毡等防水材料包裹或涂有沥青质的防水层时，不得利用基础内的钢筋作为接地装置，此时在基础槽的周围敷设环型接地装置，并与基础内的钢筋做可靠连接。希望能帮助到你

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