一、環網箱是什么
環網箱就是每(mei)個(ge)配電支(zhi)路設一(yi)(yi)臺(tai)開(kai)(kai)關柜(ju)(出(chu)線(xian)(xian)(xian)開(kai)(kai)關柜(ju)),這臺(tai)開(kai)(kai)關柜(ju)的(de)母線(xian)(xian)(xian)一(yi)(yi)同(tong)(tong)就是環(huan)(huan)形(xing)干線(xian)(xian)(xian)的(de)一(yi)(yi)部分(fen)。就是說,環(huan)(huan)形(xing)干線(xian)(xian)(xian)是由每(mei)臺(tai)出(chu)線(xian)(xian)(xian)柜(ju)的(de)母線(xian)(xian)(xian)連接起來共同(tong)(tong)組成的(de)。每(mei)臺(tai)出(chu)線(xian)(xian)(xian)柜(ju)叫“環(huan)(huan)網(wang)箱”,國(guo)外叫環(huan)(huan)網(wang)供電單元。
二、環網箱的作用是什么
用于分合(he)負(fu)荷(he)電(dian)(dian)(dian)流(liu),開斷(duan)短路電(dian)(dian)(dian)流(liu)及(ji)變壓器空載(zai)電(dian)(dian)(dian)流(liu),必(bi)定距離(li)架空線路、電(dian)(dian)(dian)纜線路的充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu),起控制和(he)保護效果,是環網供(gong)電(dian)(dian)(dian)和(he)終端供(gong)電(dian)(dian)(dian)的重要(yao)開關設備(bei)。
環(huan)(huan)網(wang)(wang)箱除了向本配(pei)電(dian)(dian)所(suo)供電(dian)(dian)外,其高(gao)(gao)壓母(mu)線(xian)還(huan)要經過環(huan)(huan)形供電(dian)(dian)網(wang)(wang)的(de)穿(chuan)越電(dian)(dian)流(即經本配(pei)電(dian)(dian)所(suo)母(mu)線(xian)向相鄰配(pei)電(dian)(dian)所(suo)供電(dian)(dian)的(de)電(dian)(dian)流),因(yin)而環(huan)(huan)網(wang)(wang)箱的(de)高(gao)(gao)壓母(mu)線(xian)截面要根據本配(pei)電(dian)(dian)所(suo)的(de)負荷電(dian)(dian)流于(yu)環(huan)(huan)網(wang)(wang)穿(chuan)越電(dian)(dian)流之和(he)選擇(ze),以(yi)保證工作中高(gao)(gao)壓母(mu)線(xian)不過負荷工作。
三、環網箱和環網柜的區別
環網柜帶開關,可以實現配網自動化,體積比較大,適合環網供電,一般都是室內使用,也有室外使用的,廣泛使用供電可靠性比較高的地方,通常雙回路供電線路上最常用。環網箱通常(chang)不帶開關,主(zhu)要是實現電纜的(de)分接和(he)轉接,目(mu)前(qian)也有帶開關的(de)環網箱(xiang),有的(de)地方直接把帶開關的(de)環網箱(xiang)稱(cheng)為戶外環網柜。