一、絕緣子串的作用是什么
絕緣(yuan)子(zi)(zi)串(chuan)(chuan)指兩個(ge)或多個(ge)絕緣(yuan)子(zi)(zi)元件組合在(zai)一起,柔性懸(xuan)掛導線的組件。絕緣(yuan)子(zi)(zi)串(chuan)(chuan)是帶有(you)固定(ding)和運行需要的保護裝置,用(yong)于(yu)懸(xuan)掛導線并使導線與桿塔(ta)和大地絕緣(yuan),那么絕緣(yuan)子(zi)(zi)串(chuan)(chuan)的作(zuo)用(yong)是什么呢?
絕緣子串起著隔離作用,其實不(bu)是有絕緣的(de)作用,主要是防止接地不(bu)合格(ge)的(de)情況(kuang)下感(gan)應電(dian)傷人。
二、絕緣子串和電壓的關系是什么
在交(jiao)流電(dian)(dian)(dian)(dian)壓(ya)(ya)作(zuo)用(yong)下的(de)(de)絕(jue)緣(yuan)子串(chuan),無論其片(pian)數(shu)多少,其分布電(dian)(dian)(dian)(dian)壓(ya)(ya)(絕(jue)緣(yuan)子串(chuan)在系(xi)統運行相電(dian)(dian)(dian)(dian)壓(ya)(ya)下,每一片(pian)絕(jue)緣(yuan)子所承受到(dao)的(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya))曲線(xian)都具相同的(de)(de)特征(zheng):電(dian)(dian)(dian)(dian)壓(ya)(ya)分布曲線(xian)呈兩端高、中間(jian)低(di)的(de)(de)馬(ma)鞍形。這是由于(yu)絕(jue)緣(yuan)子的(de)(de)自身(shen)電(dian)(dian)(dian)(dian)容(rong)C以(yi)及對導線(xian)雜散電(dian)(dian)(dian)(dian)容(rong)C1、對地的(de)(de)雜散電(dian)(dian)(dian)(dian)容(rong)Ce所致。從分布電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)中可(ke)以(yi)看(kan)出(chu),靠(kao)近(jin)導線(xian)側的(de)(de)數(shu)片(pian)絕(jue)緣(yuan)子所承受的(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)較(jiao)高,電(dian)(dian)(dian)(dian)場強(qiang)度較(jiao)大。
絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)串(chuan)電(dian)壓(ya)分布規律:由于每(mei)(mei)個絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)的(de)(de)(de)(de)金(jin)屬部分與桿塔(ta)(地)間(jian)、導(dao)線間(jian)均存在雜散電(dian)容,絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)串(chuan)中每(mei)(mei)個絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)實際所(suo)分擔(dan)的(de)(de)(de)(de)電(dian)壓(ya)并不相同(tong)。沿(yan)絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)串(chuan)的(de)(de)(de)(de)電(dian)壓(ya)分布是極不均勻的(de)(de)(de)(de),靠近導(dao)線的(de)(de)(de)(de)絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)電(dian)壓(ya)降最大,離導(dao)線愈遠的(de)(de)(de)(de)絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)兩端壓(ya)降愈小,當絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)靠近桿塔(ta)橫擔(dan)時,絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)電(dian)壓(ya)降又(you)升高(gao)。絕(jue)(jue)緣(yuan)(yuan)子(zi)(zi)(zi)串(chuan)愈長,電(dian)壓(ya)分布愈不均勻,愈容易導(dao)致某些部位的(de)(de)(de)(de)絕(jue)(jue)緣(yuan)(yuan)損(sun)壞。