一、電源避雷器的工作原理是什么

1、雷(lei)(lei)電(dian)(dian)(dian)(dian)及(ji)其它強(qiang)干擾對(dui)(dui)通(tong)(tong)信(xin)(xin)系統的(de)(de)(de)(de)致(zhi)損及(ji)由此引(yin)(yin)起的(de)(de)(de)(de)后果是(shi)嚴重的(de)(de)(de)(de)，雷(lei)(lei)電(dian)(dian)(dian)(dian)防(fang)護將成(cheng)為必需。雷(lei)(lei)電(dian)(dian)(dian)(dian)由高能的(de)(de)(de)(de)低頻成(cheng)分(fen)與極具滲(shen)透性(xing)的(de)(de)(de)(de)高頻成(cheng)分(fen)組(zu)成(cheng)。其主(zhu)要(yao)通(tong)(tong)過兩種(zhong)形式(shi)，電(dian)(dian)(dian)(dian)源(yuan)防(fang)雷(lei)(lei)器(qi)一種(zhong)是(shi)通(tong)(tong)過金(jin)屬管(guan)線(xian)(xian)(xian)或地(di)(di)(di)線(xian)(xian)(xian)直接傳(chuan)導雷(lei)(lei)電(dian)(dian)(dian)(dian)致(zhi)損設(she)(she)備；一種(zhong)是(shi)閃電(dian)(dian)(dian)(dian)通(tong)(tong)道(dao)及(ji)泄流通(tong)(tong)道(dao)的(de)(de)(de)(de)雷(lei)(lei)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)磁(ci)脈沖以各種(zhong)耦合方式(shi)感(gan)應到(dao)金(jin)屬管(guan)線(xian)(xian)(xian)或地(di)(di)(di)線(xian)(xian)(xian)產生浪(lang)(lang)涌(yong)致(zhi)損設(she)(she)備。絕大部分(fen)雷(lei)(lei)損由這(zhe)種(zhong)感(gan)應而引(yin)(yin)起。對(dui)(dui)于電(dian)(dian)(dian)(dian)子信(xin)(xin)息設(she)(she)備而言(yan)，危害主(zhu)要(yao)來自(zi)于由雷(lei)(lei)電(dian)(dian)(dian)(dian)引(yin)(yin)起的(de)(de)(de)(de)雷(lei)(lei)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)磁(ci)脈沖的(de)(de)(de)(de)耦合能量，通(tong)(tong)過以下三個通(tong)(tong)道(dao)所產生的(de)(de)(de)(de)瞬態浪(lang)(lang)涌(yong)。金(jin)屬管(guan)線(xian)(xian)(xian)通(tong)(tong)道(dao)，如自(zi)來水管(guan)、電(dian)(dian)(dian)(dian)源(yuan)線(xian)(xian)(xian)、天饋(kui)線(xian)(xian)(xian)、信(xin)(xin)號線(xian)(xian)(xian)、航空障(zhang)礙燈(deng)引(yin)(yin)線(xian)(xian)(xian)等產生的(de)(de)(de)(de)浪(lang)(lang)涌(yong)；地(di)(di)(di)線(xian)(xian)(xian)通(tong)(tong)道(dao)，地(di)(di)(di)電(dian)(dian)(dian)(dian)們反(fan)擊；空間通(tong)(tong)道(dao)，電(dian)(dian)(dian)(dian)源(yuan)防(fang)雷(lei)(lei)器(qi)的(de)(de)(de)(de)輻射(she)能量。

2、其中金(jin)屬管(guan)線通道的(de)(de)(de)浪(lang)涌和地線通道的(de)(de)(de)地電(dian)位反擊是電(dian)子信(xin)(xin)息系(xi)(xi)統(tong)致(zhi)損的(de)(de)(de)主要原因，它(ta)的(de)(de)(de)最見的(de)(de)(de)致(zhi)損形式是在電(dian)力線上引起的(de)(de)(de)雷損，所(suo)以(yi)需(xu)作(zuo)為(wei)防(fang)(fang)擴的(de)(de)(de)重點。由于雷電(dian)無孔不入地侵襲(xi)電(dian)子信(xin)(xin)息系(xi)(xi)統(tong)，雷電(dian)防(fang)(fang)護(hu)將是個(ge)系(xi)(xi)統(tong)工程。雷電(dian)防(fang)(fang)護(hu)的(de)(de)(de)中心內(nei)容(rong)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(yuan)防雷器接入(ru)模式：

1、在TN制(zhi)式中(zhong)，一般情況下電(dian)源防(fang)(fang)(fang)雷器只需作共模(mo)接法，即接于相(xiang)線(xian)(xian)中(zhong)性線(xian)(xian)與保(bao)護(hu)地(di)線(xian)(xian)之間。但在TN-S制(zhi)式的(de)(de)(de)起始位置，中(zhong)性線(xian)(xian)與保(bao)護(hu)地(di)線(xian)(xian)之間無須接入電(dian)涌防(fang)(fang)(fang)雷器。只有對A級(ji)防(fang)(fang)(fang)雷等級(ji)中(zhong)的(de)(de)(de)第(di)三(san)(san)、四級(ji)和B級(ji)防(fang)(fang)(fang)雷等級(ji)中(zhong)的(de)(de)(de)第(di)三(san)(san)級(ji)上的(de)(de)(de)特別重(zhong)要設備(bei)的(de)(de)(de)電(dian)源端(duan)口，才(cai)需做差模(mo)接入，即增加接于相(xiang)線(xian)(xian)與中(zhong)性線(xian)(xian)之間的(de)(de)(de)電(dian)源防(fang)(fang)(fang)雷器。

2、在TT制式中，當第一級電源防雷器位于漏電(dian)(dian)保(bao)(bao)(bao)護器之后，可作上述共模接(jie)法。當第一級電(dian)(dian)源(yuan)防雷(lei)器位于漏電(dian)(dian)保(bao)(bao)(bao)護器之前，且高壓系統(tong)為中心點接(jie)地(di)系統(tong)，電(dian)(dian)源(yuan)保(bao)(bao)(bao)護器應作“3+1”接(jie)法，即三(san)個相線(xian)(xian)對(dui)中性線(xian)(xian)各接(jie)一個電(dian)(dian)源(yuan)保(bao)(bao)(bao)護器，中性線(xian)(xian)對(dui)保(bao)(bao)(bao)護地(di)線(xian)(xian)再接(jie)一個電(dian)(dian)源(yuan)保(bao)(bao)(bao)護器，在IT制式(shi)中，電(dian)(dian)源(yuan)防雷(lei)器只作共模接(jie)法。