雷電進入通信機房有三種方式:
一種是直擊雷直接擊中金屬導線,讓高壓雷電以波的形式沿著導線兩邊傳播而引入室內;
二種是來自感應雷的高電壓脈衝,即由於雷雨雲對大地放電;
三(san)種(zhong)是(shi)雷(lei)雨(yu)雲(yun)之(zhi)間(jian)迅(xun)速(su)放(fang)電(dian)形(xing)成(cheng)的(de)靜(jing)電(dian)感(gan)應(ying)和(he)電(dian)磁(ci)感(gan)應(ying),這(zhe)種(zhong)反(fan)擊(ji)會(hui)沿(yan)著(zhe)電(dian)力(li)係(xi)統(tong)的(de)零(ling)線(xian),保(bao)護(hu)接(jie)地(di)線(xian)和(he)各(ge)種(zhong)形(xing)式(shi)的(de)接(jie)地(di)線(xian),以(yi)波(bo)的(de)形(xing)式(shi)傳(chuan)入(ru)室(shi)內(nei)。
daloutongguojianzhuwuzhugangjin,shangduanyujieshanqi,xiaduanyudiwanglianjie,zhongjianyugecengjunyawanghuohuanxingjunyadailianjie,duijinrujianzhuwudegezhongjinshuguanxianshishijunyadengdianweilianjie,juyouteshuyaoqiudegezhongbutongdixianjinxingdengdianweichuli。
對通信網絡係統在建築物樓內的布線和接地方式要求:tongxindianlanyijidixiandebufangyingjinliangjizhongzaijianzhuwudezhongbu。tongxindianlanxiancaoyijidixianxiancaodebufangyingjinliangbimianjinkaojianzhuwulizhuhuohengliang,bingyuzhibaochijiaochangdejuli,tongxindianlanxiancaoyijidixianxiancaodeshejiyingjinkenengweiyujulijianzhuwulizhuhuohengliangjiaoyuandeweizhi。
根據雷電保護區的劃分要求,建築物大樓外部是直接雷擊區域;建jian築zhu物wu內nei部bu及ji計ji算suan機ji房fang所suo處chu的de位wei置zhi為wei非fei暴bao露lu區qu,越yue往wang內nei部bu,危wei險xian程cheng度du越yue低di。雷lei電dian過guo電dian壓ya對dui內nei部bu電dian子zi設she備bei的de損sun害hai主zhu要yao是shi沿yan線xian路lu引yin入ru。保bao護hu區qu的de界jie麵mian由you外wai部bu的de防fang雷lei係xi統tong、建jian築zhu物wu的de鋼gang筋jin混hun凝ning土tu及ji金jin屬shu外wai殼ke等deng構gou成cheng的de屏ping蔽bi層ceng形xing成cheng。電dian氣qi通tong道dao以yi及ji金jin屬shu管guan等deng金jin屬shu構gou件jian,穿chuan過guo各ge級ji雷lei電dian保bao護hu區qu時shi必bi須xu在zai每mei一yi穿chuan過guo點dian做zuo等deng電dian位wei連lian接jie。
進入建築物大樓的電源線和通訊線應在LPZ0與LPZ1、 LPZ1與LPZ2區交界處、以及終端設備的前端,根據IEC1312——雷電電磁脈衝防護標準,安裝上電源類SPD,以及通訊網絡類SPD(瞬態過電壓保護器)。SPD是用以防護電子設備因受雷電閃擊及其他幹擾造成傳導電湧過電壓危害的有效手段。