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       <h1 class="biaoti">防爆监控摄像机在户外使用时当如何做好防雷举措</h1>
       <div class="fabiao">更新时间：2019-11-09&nbsp;&nbsp;|&nbsp;&nbsp;点击率：2325</div>
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       <div>　　避雷是每一款在户外使用的电子设备必须要考虑的问题，这个问题说大不大，说小不小，没碰到无所谓，一但碰到就是整个设备瘫痪。我们的<strong>防爆监控摄像机</strong>更是如此，那么防爆监控摄像机在户外使用时当如何做好防雷举措呢？<br />&nbsp;</div><div>　　在能源行业安防监控系统中一般有两种避雷方式，一是接地，二是避雷。<br />&nbsp;</div><div>　　接地是用来保护人身、设备及供电安全的重要措施，是*的安保手段。<br />&nbsp;</div><div>　　避雷则是依据视频监控系统安装的环境与需求来决定，虽非必要，但因接地与避雷本就是相互协作的机制，因此在能源行业安防监控系统中的重要性不容忽视。<br />&nbsp;</div><div>　　监控前端接地与避雷措施<br />&nbsp;</div><div>　　1.室外的摄像机应架设避雷针，采用独立接地管线以隔离监控设备的电力与图像信号，避免干扰电流、损伤线路。避雷针架设应高于摄像机，由避雷针尖往下45-60度的虚拟立体圆椎体范围内，是摄像机的安全范围，避雷针在安装时，应与固定摄像机的钢构绝缘隔离。<br />&nbsp;</div><div>　　2.摄像机前端设备的接地在终端部分要集中在一个接地总线上，使整个监控前端设备的接地达到无对地电位差的要求，否则可能使对地环路产生电位差而令设备烧毁。<br />&nbsp;</div><div>　　3.室内前端摄像机应接地线到共享端的接地端子上，在前端设备的电源端加装容量适合的无熔丝断路器及漏电断路开关，同时在经费许可下加装可耐3000KV的避雷子以避免被感应雷或传导雷损伤设备。<br />&nbsp;</div><div>　　4.室外摄像机接地完工后，测试接地电阻小于10&Omega;以内，接地棒安装应按标准进行三点式阻抗测试。<br />&nbsp;</div><div>　　传输部分的接地与避雷<br />&nbsp;</div><div>　　1.由于能源行业某些监控信号传输距离很长，耐电压性低，容易被感应雷及传导雷电流入侵而损坏设备，为了将雷电流从信号传输线传导入地，电缆都应该加装突波保护器，在设计图像信号传输线缆时必须考虑信号的传输速率及电压的平衡与接地，避免感应雷入侵。<br />&nbsp;</div><div>　　2.室外传输及缆线应有良好的接地，接地电阻必须小于10&Omega;。<br />&nbsp;</div><div>　　3.架空自持信号或电力缆线应该将自持钢缆在固定段以接地线接入大地。<br />&nbsp;</div><div>　　4.控制信号传输线采用具有隔离遮蔽功能的缆线。<br />&nbsp;</div><div>　　5.传输部分的缆线在线路架设尽量采用埋敷方式。环境条件不许可时，可采用zui短间距架设方式以免耐压性降低而导致感应雷入侵。<br />&nbsp;</div><div>　　监控终端的接地与避雷<br />&nbsp;</div><div>　　1.在安防监控系统中，监控端的避雷措施应慎重，要考虑各种可能类型的雷击入侵、对地环路电位差现象及电力供应突波等保护措施。<br />&nbsp;</div><div>　　2.监控终端所在建筑物内应有避雷系统、接地网及接地端子等配置。<br />&nbsp;</div><div>　　3.监控终端的各种金属管线应做管线接地处理并共同接到接地装置上。电缆线进入终端机房时，应将线缆金属外护层及自持电缆钢缆部分接到接地端子上。<br />&nbsp;</div><div>　　4.室内终端传输及缆线应有更好的接地，接地电阻必须小于10&Omega;，但对地阻抗值越低越好。<br />&nbsp;</div><div>　　以上是能源行业监控系统在接地与避雷的基本有效做法，虽不会像国家规范或标准严苛，但若谨慎的处理接地与避雷的施工细节，应该算是一种有效的避雷方式。<br />&nbsp;</div>
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