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(qi)它強(qiang)干(gan)擾對(dui)通(tong)(tong)信(xin)系(xi)統的(de)(de)(de)致(zhi)損及(ji)由此引起的(de)(de)(de)后(hou)果是(shi)嚴重的(de)(de)(de)，雷(lei)(lei)電(dian)(dian)(dian)(dian)防護將成為必需。雷(lei)(lei)電(dian)(dian)(dian)(dian)由高能的(de)(de)(de)低(di)頻(pin)成分(fen)(fen)與極具(ju)滲透性的(de)(de)(de)高頻(pin)成分(fen)(fen)組成。其(qi)主(zhu)要(yao)通(tong)(tong)過(guo)兩種(zhong)形式(shi)，電(dian)(dian)(dian)(dian)源(yuan)防雷(lei)(lei)器一種(zhong)是(shi)通(tong)(tong)過(guo)金屬(shu)管線(xian)或地(di)(di)線(xian)直接傳導雷(lei)(lei)電(dian)(dian)(dian)(dian)致(zhi)損設備；一種(zhong)是(shi)閃電(dian)(dian)(dian)(dian)通(tong)(tong)道及(ji)泄(xie)流通(tong)(tong)道的(de)(de)(de)雷(lei)(lei)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)磁(ci)脈沖以(yi)各種(zhong)耦(ou)合方(fang)式(shi)感應到金屬(shu)管線(xian)或地(di)(di)線(xian)產(chan)生浪涌致(zhi)損設備。絕大部分(fen)(fen)雷(lei)(lei)損由這(zhe)種(zhong)感應而(er)引起。對(dui)于電(dian)(dian)(dian)(dian)子(zi)信(xin)息設備而(er)言，危害主(zhu)要(yao)來(lai)自(zi)于由雷(lei)(lei)電(dian)(dian)(dian)(dian)引起的(de)(de)(de)雷(lei)(lei)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)磁(ci)脈沖的(de)(de)(de)耦(ou)合能量，通(tong)(tong)過(guo)以(yi)下三個通(tong)(tong)道所產(chan)生的(de)(de)(de)瞬態浪涌。金屬(shu)管線(xian)通(tong)(tong)道，如(ru)自(zi)來(lai)水(shui)管、電(dian)(dian)(dian)(dian)源(yuan)線(xian)、天饋線(xian)、信(xin)號(hao)線(xian)、航空障礙(ai)燈引線(xian)等產(chan)生的(de)(de)(de)浪涌；地(di)(di)線(xian)通(tong)(tong)道，地(di)(di)電(dian)(dian)(dian)(dian)們(men)反擊；空間通(tong)(tong)道，電(dian)(dian)(dian)(dian)源(yuan)防雷(lei)(lei)器的(de)(de)(de)輻射(she)能量。

2、其(qi)中金屬管(guan)線(xian)通道的(de)浪涌和(he)地(di)線(xian)通道的(de)地(di)電(dian)位反擊是(shi)(shi)電(dian)子信息系統(tong)致損的(de)主要(yao)原因，它(ta)的(de)最(zui)見的(de)致損形(xing)式是(shi)(shi)在電(dian)力線(xian)上引起的(de)雷(lei)損，所以需作為防擴的(de)重點。由于雷(lei)電(dian)無孔不入(ru)地(di)侵(qin)襲電(dian)子信息系統(tong)，雷(lei)電(dian)防護將是(shi)(shi)個(ge)系統(tong)工(gong)程。雷(lei)電(dian)防護的(de)中心內容是(shi)(shi)泄放和(he)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(lei)器接入模(mo)式：

1、在(zai)TN制式中(zhong)(zhong)，一般情(qing)況(kuang)下電(dian)(dian)源防(fang)雷(lei)(lei)器(qi)只需(xu)(xu)作共(gong)模接(jie)(jie)法，即接(jie)(jie)于(yu)相線(xian)(xian)中(zhong)(zhong)性(xing)(xing)線(xian)(xian)與(yu)保(bao)護(hu)(hu)地線(xian)(xian)之(zhi)間(jian)。但(dan)在(zai)TN-S制式的(de)(de)起(qi)始位置(zhi)，中(zhong)(zhong)性(xing)(xing)線(xian)(xian)與(yu)保(bao)護(hu)(hu)地線(xian)(xian)之(zhi)間(jian)無須接(jie)(jie)入(ru)電(dian)(dian)涌防(fang)雷(lei)(lei)器(qi)。只有對A級防(fang)雷(lei)(lei)等(deng)級中(zhong)(zhong)的(de)(de)第(di)三、四級和(he)B級防(fang)雷(lei)(lei)等(deng)級中(zhong)(zhong)的(de)(de)第(di)三級上的(de)(de)特別重要設備(bei)的(de)(de)電(dian)(dian)源端口，才需(xu)(xu)做差模接(jie)(jie)入(ru)，即增加接(jie)(jie)于(yu)相線(xian)(xian)與(yu)中(zhong)(zhong)性(xing)(xing)線(xian)(xian)之(zhi)間(jian)的(de)(de)電(dian)(dian)源防(fang)雷(lei)(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)保(bao)(bao)護(hu)(hu)器(qi)之(zhi)后，可作(zuo)(zuo)上述共模(mo)(mo)接(jie)法。當第(di)一(yi)(yi)級電(dian)(dian)源(yuan)(yuan)(yuan)防雷器(qi)位于(yu)漏電(dian)(dian)保(bao)(bao)護(hu)(hu)器(qi)之(zhi)前，且高壓系(xi)統(tong)為(wei)中(zhong)(zhong)心點接(jie)地(di)系(xi)統(tong)，電(dian)(dian)源(yuan)(yuan)(yuan)保(bao)(bao)護(hu)(hu)器(qi)應(ying)作(zuo)(zuo)“3+1”接(jie)法，即三(san)個相線對中(zhong)(zhong)性線各接(jie)一(yi)(yi)個電(dian)(dian)源(yuan)(yuan)(yuan)保(bao)(bao)護(hu)(hu)器(qi)，中(zhong)(zhong)性線對保(bao)(bao)護(hu)(hu)地(di)線再接(jie)一(yi)(yi)個電(dian)(dian)源(yuan)(yuan)(yuan)保(bao)(bao)護(hu)(hu)器(qi)，在IT制式中(zhong)(zhong)，電(dian)(dian)源(yuan)(yuan)(yuan)防雷器(qi)只作(zuo)(zuo)共模(mo)(mo)接(jie)法。