一、電源避雷器的工作原理是什么

1、雷(lei)(lei)電(dian)(dian)(dian)及其它強(qiang)干擾對通(tong)(tong)(tong)信(xin)(xin)系統的(de)致(zhi)損(sun)及由此引起的(de)后(hou)果(guo)是(shi)嚴重的(de)，雷(lei)(lei)電(dian)(dian)(dian)防(fang)(fang)護(hu)將成為必需(xu)。雷(lei)(lei)電(dian)(dian)(dian)由高能(neng)的(de)低頻成分(fen)與(yu)極具滲透性的(de)高頻成分(fen)組成。其主(zhu)要(yao)通(tong)(tong)(tong)過兩種(zhong)形(xing)式(shi)，電(dian)(dian)(dian)源防(fang)(fang)雷(lei)(lei)器(qi)一種(zhong)是(shi)通(tong)(tong)(tong)過金屬管(guan)線(xian)(xian)或地(di)(di)線(xian)(xian)直接傳導雷(lei)(lei)電(dian)(dian)(dian)致(zhi)損(sun)設備；一種(zhong)是(shi)閃電(dian)(dian)(dian)通(tong)(tong)(tong)道(dao)及泄流通(tong)(tong)(tong)道(dao)的(de)雷(lei)(lei)電(dian)(dian)(dian)電(dian)(dian)(dian)磁脈(mo)沖(chong)以(yi)各種(zhong)耦(ou)合(he)方式(shi)感(gan)應(ying)到金屬管(guan)線(xian)(xian)或地(di)(di)線(xian)(xian)產(chan)生浪涌致(zhi)損(sun)設備。絕(jue)大部分(fen)雷(lei)(lei)損(sun)由這種(zhong)感(gan)應(ying)而引起。對于電(dian)(dian)(dian)子信(xin)(xin)息設備而言(yan)，危害主(zhu)要(yao)來自于由雷(lei)(lei)電(dian)(dian)(dian)引起的(de)雷(lei)(lei)電(dian)(dian)(dian)電(dian)(dian)(dian)磁脈(mo)沖(chong)的(de)耦(ou)合(he)能(neng)量(liang)，通(tong)(tong)(tong)過以(yi)下三個通(tong)(tong)(tong)道(dao)所產(chan)生的(de)瞬態浪涌。金屬管(guan)線(xian)(xian)通(tong)(tong)(tong)道(dao)，如(ru)自來水管(guan)、電(dian)(dian)(dian)源線(xian)(xian)、天饋(kui)線(xian)(xian)、信(xin)(xin)號(hao)線(xian)(xian)、航(hang)空障礙(ai)燈引線(xian)(xian)等產(chan)生的(de)浪涌；地(di)(di)線(xian)(xian)通(tong)(tong)(tong)道(dao)，地(di)(di)電(dian)(dian)(dian)們反擊；空間通(tong)(tong)(tong)道(dao)，電(dian)(dian)(dian)源防(fang)(fang)雷(lei)(lei)器(qi)的(de)輻射(she)能(neng)量(liang)。

2、其(qi)中金屬管(guan)線通(tong)道的(de)(de)浪涌和地(di)線通(tong)道的(de)(de)地(di)電位反擊(ji)是電子信息(xi)系(xi)統(tong)致損的(de)(de)主要原因，它的(de)(de)最見的(de)(de)致損形式是在電力線上引起的(de)(de)雷損，所(suo)以需作為防擴的(de)(de)重點(dian)。由于雷電無孔不(bu)入地(di)侵襲電子信息(xi)系(xi)統(tong)，雷電防護(hu)(hu)將(jiang)是個系(xi)統(tong)工程。雷電防護(hu)(hu)的(de)(de)中心內容是泄放和均衡。

該圖片由注冊用戶"淺嘗不止—"提供，版權聲明反饋

二、電源防雷器怎么接線

電源防雷器(qi)接入模式：

1、在TN制式(shi)中，一般情況下電源(yuan)防雷(lei)器(qi)只(zhi)需作共模(mo)接(jie)法(fa)，即(ji)接(jie)于相線(xian)中性線(xian)與(yu)保護地(di)線(xian)之(zhi)(zhi)間。但在TN-S制式(shi)的(de)起始位置，中性線(xian)與(yu)保護地(di)線(xian)之(zhi)(zhi)間無須接(jie)入電涌防雷(lei)器(qi)。只(zhi)有(you)對A級(ji)(ji)(ji)(ji)防雷(lei)等(deng)級(ji)(ji)(ji)(ji)中的(de)第三(san)(san)、四級(ji)(ji)(ji)(ji)和B級(ji)(ji)(ji)(ji)防雷(lei)等(deng)級(ji)(ji)(ji)(ji)中的(de)第三(san)(san)級(ji)(ji)(ji)(ji)上的(de)特別重要設備(bei)的(de)電源(yuan)端口，才需做差模(mo)接(jie)入，即(ji)增加接(jie)于相線(xian)與(yu)中性線(xian)之(zhi)(zhi)間的(de)電源(yuan)防雷(lei)器(qi)。

2、在TT制式中，當第一級電源防雷器位于(yu)漏電(dian)(dian)(dian)(dian)(dian)保護器(qi)(qi)(qi)之后，可(ke)作上述共模接(jie)法。當第一級(ji)電(dian)(dian)(dian)(dian)(dian)源防(fang)雷器(qi)(qi)(qi)位于(yu)漏電(dian)(dian)(dian)(dian)(dian)保護器(qi)(qi)(qi)之前，且高壓系統(tong)為(wei)中心點(dian)接(jie)地系統(tong)，電(dian)(dian)(dian)(dian)(dian)源保護器(qi)(qi)(qi)應作“3+1”接(jie)法，即三(san)個(ge)相(xiang)線對(dui)中性線各接(jie)一個(ge)電(dian)(dian)(dian)(dian)(dian)源保護器(qi)(qi)(qi)，中性線對(dui)保護地線再接(jie)一個(ge)電(dian)(dian)(dian)(dian)(dian)源保護器(qi)(qi)(qi)，在IT制式中，電(dian)(dian)(dian)(dian)(dian)源防(fang)雷器(qi)(qi)(qi)只作共模接(jie)法。