一、環網箱是什么

環網箱就(jiu)是(shi)每個配電支(zhi)路設一臺(tai)開關(guan)(guan)柜(ju)(ju)（出(chu)(chu)線(xian)(xian)(xian)開關(guan)(guan)柜(ju)(ju)），這(zhe)臺(tai)開關(guan)(guan)柜(ju)(ju)的母(mu)線(xian)(xian)(xian)一同就(jiu)是(shi)環(huan)形(xing)(xing)干(gan)線(xian)(xian)(xian)的一部分。就(jiu)是(shi)說，環(huan)形(xing)(xing)干(gan)線(xian)(xian)(xian)是(shi)由(you)每臺(tai)出(chu)(chu)線(xian)(xian)(xian)柜(ju)(ju)的母(mu)線(xian)(xian)(xian)連(lian)接起來共同組成的。每臺(tai)出(chu)(chu)線(xian)(xian)(xian)柜(ju)(ju)叫(jiao)“環(huan)網箱”，國外叫(jiao)環(huan)網供電單(dan)元。

二、環網箱的作用是什么

用于分合(he)負荷(he)電(dian)(dian)(dian)(dian)流，開(kai)斷短路電(dian)(dian)(dian)(dian)流及變壓(ya)器(qi)空載電(dian)(dian)(dian)(dian)流，必定距離架空線(xian)路、電(dian)(dian)(dian)(dian)纜線(xian)路的(de)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流，起控制和(he)保(bao)護效果(guo)，是環網供(gong)電(dian)(dian)(dian)(dian)和(he)終端供(gong)電(dian)(dian)(dian)(dian)的(de)重要開(kai)關設(she)備。

環(huan)網箱除了向本配電(dian)(dian)(dian)(dian)所(suo)(suo)供電(dian)(dian)(dian)(dian)外(wai)，其高壓(ya)母(mu)(mu)線還要經過環(huan)形供電(dian)(dian)(dian)(dian)網的穿越電(dian)(dian)(dian)(dian)流(liu)(liu)（即經本配電(dian)(dian)(dian)(dian)所(suo)(suo)母(mu)(mu)線向相鄰配電(dian)(dian)(dian)(dian)所(suo)(suo)供電(dian)(dian)(dian)(dian)的電(dian)(dian)(dian)(dian)流(liu)(liu)），因而環(huan)網箱的高壓(ya)母(mu)(mu)線截面(mian)要根據本配電(dian)(dian)(dian)(dian)所(suo)(suo)的負荷電(dian)(dian)(dian)(dian)流(liu)(liu)于環(huan)網穿越電(dian)(dian)(dian)(dian)流(liu)(liu)之(zhi)和選(xuan)擇，以保(bao)證工作(zuo)中高壓(ya)母(mu)(mu)線不過負荷工作(zuo)。

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。環網箱通常不帶開關，主要是實現電纜的(de)分接(jie)和轉接(jie)，目前也(ye)有帶開關的(de)環(huan)網(wang)(wang)箱，有的(de)地方直接(jie)把帶開關的(de)環(huan)網(wang)(wang)箱稱為戶外環(huan)網(wang)(wang)柜。