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山东保安服务常识:安装防雷设备常见的问题
编辑:澳门官方网站平台  更新时间:2017-05-03 10:07:49
专业的防雷商品厂家或工程商在对监控体系装置防雷设备时会遇到以下几个疑问:
Professional manufacturers or manufacturers of lightning protection equipment in the monitoring system will encounter the following questions:
一、接地电阻太大或无接地
First, the grounding resistance is too large or no grounding
《视频安防监控体系工程规划规范》和《建筑物信息体系防雷技术规范》中没有清晰的规则监控体系防雷的接地阻值。通常依照计算机房阻值和信息体系接地阻值去做规划监控体系的接地阻值:独立接地不大于4欧姆,联合接地电阻不大于1欧姆。详细上说要根据不一样的地质状况能够恰当的添加监控体系的接地电阻。例如:森林防火单位,摄像机请求必需装置到山脊上,地址状况是青石,200米范围内无河流水沟,无能够进行挖掘的大型碎石、土壤地带。这个时分关于这个特定当地的监控体系接地假如请求做到不大于4欧姆,本钱是监控体系本身的十倍乃至是几十倍那么就挑选恰当的增大接地电阻,运用大通流量的线缆作为衔接地线。
"Video security monitoring system engineering planning standards" and "building information system lightning protection technical specifications" in the absence of clear rules for monitoring system lightning grounding resistance. In general, the grounding resistance of the monitoring and control system is determined in accordance with the resistance value of the computer room and the grounding resistance of the information system. The grounding resistance is not more than 4 ohms, and the grounding resistance is not more than 1 ohms. In detail, according to different geological conditions can be added to the monitoring system of grounding resistance. For example: forest fire prevention unit, the camera request must be installed on the ridge, the address is Qingshi, 200 meters within the scope of the river ditch, no excavation of large gravel, soil. This time on this specific local monitoring system of grounding if do not more than 4 ohms request, the cost is ten times the monitoring system itself or even dozens of times then select an appropriate increase of grounding resistance, the discharge of cable as the connection wire.
二、无直击雷防护措施
Two, no direct lightning protection measures
这种状况对比多见的是枪机摄像机,有人以为已将装置了三合一信号避雷器,接地也做好了,应当没有疑问了,但是却不知道避雷器是防感应雷的东西,关于直击雷没有多大效果。直击雷防护主要靠避雷针这类设备,改变了雷电的运转方向,使雷电不大可能直接击中监控设备。还有一种状况是运用曲杆球机的竟然装置避雷针,这种状况的金属杆假如接地良好本身已将球机维护起来,没有必要在添加本钱,装置避雷针。
This situation is rare compared to bolt camera, some people think that the device has three signal arrester grounding is done, there should be no doubt, but do not know the anti lightning arrester is something about lightning doesn't have much effect. Direct lightning protection mainly rely on lightning rod such equipment, changing the direction of the operation of lightning, lightning is unlikely to directly hit the monitoring equipment. There is a situation is the use of bent rod ball device even the lightning rod, the situation of the metal rod if the ground itself has been a good maintenance of the ball machine, there is no need to increase the cost of the installation of lightning rod.
三、信号避雷器间隔要被维护的设备太远
Three, signal arrester spacing to be maintained equipment too far
假如避雷器装置的间隔离设备太远,没有办法消除避雷器到设备前端这段通信线路和电源线路上感应生出的雷电流。所以主张信号避雷器应当直接装置到监控设备的前端,特别是哪些将信号电源线路走显着的当地。
If the isolation device is too far away from the arrester device, there is no way to eliminate the lightning arrester to the front end of the device communication lines and power lines on the induction of lightning current. So the signal arrester should be installed directly to the front end of the monitoring equipment, in particular, which will signal the power line to go significantly local.
四、接地线缆的疑问
Four, the question of grounding cable
为了节约本钱常常使用金属杆作为作业接地体系的引下线,暂时不管“对”与“否”。依照规划通常把金属杆作为直击雷维护体系引下线,这个时分把作业地接到金属杆上,假如有直击雷的时分在信号避雷器前端和金属杆杆体刹那间没有电压差,直击雷会直接冲击信号避雷器或电源避雷器,这么会使避雷器提早老化或当场损坏。所以主张作业地引下线应当单独接出。
In order to save the cost of the metal rod is often used as the grounding line of the operating system, for the time being "right" and "no"". According to the plan usually put the metal rod as lightning maintenance system lead to work, this time from the metal rod, if when there is lightning arrester signal in front and the metal rod suddenly no voltage difference will directly impact the signal lightning arrester or power source arrester, so the lightning for premature aging or damage on the spot. Therefore, the work should be taken out of the referral



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