為了(le)避免信(xin)息技術設備被干(gan)擾(rao)甚至損壞，信(xin)號(hao)浪(lang)(lang)涌(yong)(yong)保(bao)護(hu)器必(bi)須(xu)將干(gan)擾(rao)影響限(xian)制到被保(bao)護(hu)設備的浪(lang)(lang)涌(yong)(yong)抗擾(rao)度值(zhi)以(yi)下。與(yu)電力(li)系統(tong)(tong)中浪(lang)(lang)涌(yong)(yong)保(bao)護(hu)器的選擇相比(bi)，信(xin)號(hao)浪(lang)(lang)涌(yong)(yong)保(bao)護(hu)器在220/380V系統(tong)(tong)中電壓和頻率是固(gu)定的，而(er)在信(xin)息系統(tong)(tong)中傳送的信(xin)號(hao)有(you)不同(tong)的種類，因此(ci)信(xin)號(hao)浪(lang)(lang)涌(yong)(yong)保(bao)護(hu)器的保(bao)護(hu)模式(shi)也不相同(tong)。今(jin)天鈞(jun)和電子(zi)就(jiu)信(xin)號(hao)浪(lang)(lang)涌(yong)(yong)保(bao)護(hu)器的保(bao)護(hu)模式(shi)分(fen)享如下：

一、信號浪涌保(bao)護(hu)器的保(bao)護(hu)原(yuan)則

被傳送信(xin)(xin)號(hao)(hao)的(de)(de)(de)每一個(ge)電氣參(can)數都包含實際(ji)傳送的(de)(de)(de)信(xin)(xin)息(xi)，因(yin)此在電子信(xin)(xin)息(xi)系(xi)統中(zhong)電源浪涌保(bao)(bao)(bao)護器(qi)和(he)信(xin)(xin)號(hao)(hao)浪涌保(bao)(bao)(bao)護器(qi)的(de)(de)(de)安(an)裝(zhuang)均不能影(ying)響信(xin)(xin)號(hao)(hao)傳輸。信(xin)(xin)號(hao)(hao)浪涌保(bao)(bao)(bao)護器(qi)按(an)照(zhao)防(fang)(fang)雷保(bao)(bao)(bao)護區的(de)(de)(de)概念在計算中(zhong)心的(de)(de)(de)安(an)裝(zhuang)。為了減小電磁場的(de)(de)(de)影(ying)響，建(jian)筑物(wu)或防(fang)(fang)檢(jian)的(de)(de)(de)屏蔽措施已經(jing)到位。在防(fang)(fang)雷保(bao)(bao)(bao)護區LPZO和(he)LPZ1之間的(de)(de)(de)界面上，電力系(xi)統通過B級電源浪涌保(bao)(bao)(bao)護器(qi)接入防(fang)(fang)雷保(bao)(bao)(bao)護等(deng)電位連接。LPZ1到LPZ2通過局(ju)部等(deng)電位連接到C級浪涌保(bao)(bao)(bao)護器(qi)實現。

二、信號(hao)浪涌(yong)保護(hu)器的(de)平行線對保護(hu)模(mo)式

一(yi)(yi)般雙絞線(xian)(xian)、平行(xing)(xing)線(xian)(xian)對(dui)(dui)的(de)兩個信號線(xian)(xian)對(dui)(dui)地完(wan)全均衡，所以它們的(de)防雷要(yao)(yao)(yao)求(qiu)(qiu)(qiu)也(ye)是(shi)完(wan)全一(yi)(yi)樣的(de)，而且多(duo)對(dui)(dui)平行(xing)(xing)線(xian)(xian)的(de)防雷與(yu)一(yi)(yi)對(dui)(dui)平行(xing)(xing)線(xian)(xian)的(de)原理完(wan)全相同。對(dui)(dui)于一(yi)(yi)對(dui)(dui)平行(xing)(xing)的(de)通信線(xian)(xian)路，一(yi)(yi)般要(yao)(yao)(yao)求(qiu)(qiu)(qiu)在任意導(dao)線(xian)(xian)對(dui)(dui)大地、導(dao)線(xian)(xian)與(yu)導(dao)線(xian)(xian)之間(jian)都需要(yao)(yao)(yao)考(kao)慮(lv)防雷保護要(yao)(yao)(yao)求(qiu)(qiu)(qiu)。對(dui)(dui)于哪些連接精密設(she)備、防雷要(yao)(yao)(yao)求(qiu)(qiu)(qiu)高的(de)平行(xing)(xing)線(xian)(xian)對(dui)(dui)，還要(yao)(yao)(yao)考(kao)慮(lv)多(duo)級防雷電路。

三、信號浪涌保護(hu)額(e)的同(tong)軸線保護(hu)模式(shi)

普通同(tong)(tong)軸(zhou)線(xian)只(zhi)有金(jin)屬(shu)芯(xin)線(xian)與(yu)金(jin)屬(shu)外皮層，這類同(tong)(tong)軸(zhou)線(xian)的防雷(lei)保護主(zhu)要集中在芯(xin)線(xian)與(yu)金(jin)屬(shu)外皮層之(zhi)(zhi)間。也有的同(tong)(tong)軸(zhou)線(xian)在芯(xin)線(xian)和金(jin)屬(shu)外皮層還有一層接地屏(ping)蔽(bi)層，這種同(tong)(tong)軸(zhou)線(xian)的防雷(lei)除了芯(xin)線(xian)與(yu)外皮層之(zhi)(zhi)間外，還需要在外皮與(yu)屏(ping)蔽(bi)層之(zhi)(zhi)間采取防護措(cuo)施。