在(zai)視頻(pin)監控(kong)系統(tong)中(zhong)，視頻(pin)監控(kong)中(zhong)心往往是處理視頻(pin)監控(kong)錄(lu)像的地方，因(yin)此其防(fang)雷(lei)也顯(xian)得(de)格(ge)外重要。簡單來說，視頻(pin)監控(kong)中(zhong)心防(fang)雷(lei)應從直擊雷(lei)防(fang)護、防(fang)雷(lei)電(dian)波(bo)侵(qin)入、對設備輸(shu)入輸(shu)出(chu)口設置“限壓保護電(dian)路”。
       從(cong)直(zhi)擊(ji)雷(lei)防(fang)(fang)護(hu)來說，視頻監(jian)控中心(xin)所在(zai)建(jian)筑物應有防(fang)(fang)直(zhi)擊(ji)雷(lei)的避(bi)雷(lei)針(zhen)、避(bi)雷(lei)帶或避(bi)雷(lei)網。架空電纜(lan)線直(zhi)接引入時，在(zai)入戶處應加裝(zhuang)避(bi)雷(lei)器，并設置“限(xian)壓保護(hu)電路”。
網絡上(shang)一直流傳著“防雷秘籍”，如(ru)人們在雷雨天(tian)氣要避(bi)免(mian)使用家用電器、務必切斷電源等等。此舉真(zhen)的(de)有必要嗎？
       重(zhong)慶防(fang)雷(lei)檢測技術人員表示(shi)，有建(jian)筑物避雷(lei)防(fang)雷(lei)裝置“把關”，雷(lei)電(dian)(dian)不會通過電(dian)(dian)源線(xian)侵入電(dian)(dian)器。比(bi)如(ru)，筆記本電(dian)(dian)腦電(dian)(dian)源線(xian)的一端(duan)有個凸起的圓(yuan)柱(zhu)體(ti)，它的內部是一個小磁環(huan)，可以屏(ping)蔽高頻干擾信號，同時防(fang)止漏電(dian)(dian)、靜(jing)電(dian)(dian)等對(dui)電(dian)(dian)子產品的損傷(shang)。
       絕大多數(shu)雷(lei)擊發生(sheng)在高壓(ya)(ya)輸電(dian)系(xi)統(tong)及(ji)中壓(ya)(ya)配電(dian)線(xian)(xian)路中，電(dian)力系(xi)統(tong)應對這些雷(lei)擊有堅(jian)強的“一(yi)道防線(xian)(xian)”，避(bi)雷(lei)線(xian)(xian)、避(bi)雷(lei)針、避(bi)雷(lei)器等(deng)防雷(lei)裝置將(jiang)(jiang)使“雷(lei)公”繞道而(er)行。此(ci)外，一(yi)般的住宅小(xiao)區根據建筑物防雷(lei)設(she)計規(gui)范(fan)都安(an)裝了電(dian)壓(ya)(ya)鉗(qian)制設(she)施。這些設(she)施可(ke)以有效(xiao)吸收低壓(ya)(ya)系(xi)統(tong)中突發的巨大能量，將(jiang)(jiang)“竄”入電(dian)力線(xian)(xian)、信(xin)號傳(chuan)播線(xian)(xian)的瞬間(jian)超過工(gong)作電(dian)壓(ya)(ya)，限制在系(xi)統(tong)所(suo)能承受(shou)的電(dian)壓(ya)(ya)范(fan)圍，保護用戶設(she)備。
       而我們常用的無線(xian)網(wang)絡，本質(zhi)是一種在空氣中(zhong)傳輸的無線(xian)電(dian)波，就好像在空氣中(zhong)有很(hen)多(duo)看不見的直線(xian)。另外(wai)，傳輸線(xian)埋(mai)地(di)(di)敷設并不能阻止(zhi)雷(lei)擊的(de)(de)(de)發生，大量事實顯(xian)示，雷(lei)擊造(zao)成(cheng)埋(mai)地(di)(di)線(xian)纜(lan)(lan)(lan)的(de)(de)(de)故障大約占(zhan)總故障的(de)(de)(de)30%左右，即使距(ju)離雷(lei)擊比較遠的(de)(de)(de)地(di)(di)方，也仍(reng)有部分雷(lei)電(dian)(dian)(dian)(dian)流(liu)流(liu)入(ru)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)。因此，如果采用(yong)帶屏蔽(bi)層的(de)(de)(de)線(xian)纜(lan)(lan)(lan)或線(xian)纜(lan)(lan)(lan)穿(chuan)(chuan)鋼(gang)管(guan)(guan)(guan)埋(mai)地(di)(di)敷設，需注(zhu)意保持(chi)鋼(gang)管(guan)(guan)(guan)的(de)(de)(de)電(dian)(dian)(dian)(dian)氣連通(tong)，這(zhe)對防護(hu)電(dian)(dian)(dian)(dian)磁干擾和電(dian)(dian)(dian)(dian)磁感應(ying)非常有效，這(zhe)主要是由于金屬管(guan)(guan)(guan)的(de)(de)(de)屏蔽(bi)作用(yong)和雷(lei)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)集膚效應(ying)。當然，如果電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)全程穿(chuan)(chuan)金屬管(guan)(guan)(guan)有困難，可在(zai)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)進(jin)入(ru)終端(duan)和前(qian)(qian)端(duan)設備前(qian)(qian)穿(chuan)(chuan)金屬管(guan)(guan)(guan)埋(mai)地(di)(di)引入(ru)，但(dan)埋(mai)地(di)(di)長度不得(de)小于15米(mi)，在(zai)入(ru)戶(hu)端(duan)將電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)金屬外(wai)皮、鋼(gang)管(guan)(guan)(guan)同防雷(lei)接地(di)(di)裝(zhuang)置相連。

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