一、環網箱是什么

環網箱就是每個配電支路設一(yi)臺(tai)(tai)開關(guan)(guan)柜（出線(xian)(xian)開關(guan)(guan)柜），這(zhe)臺(tai)(tai)開關(guan)(guan)柜的(de)母線(xian)(xian)一(yi)同就是環形干線(xian)(xian)的(de)一(yi)部分。就是說，環形干線(xian)(xian)是由每臺(tai)(tai)出線(xian)(xian)柜的(de)母線(xian)(xian)連接(jie)起來共同組(zu)成的(de)。每臺(tai)(tai)出線(xian)(xian)柜叫“環網(wang)箱(xiang)”，國外叫環網(wang)供電單元。

二、環網箱的作用是什么

用于分合(he)負荷(he)電(dian)(dian)流，開斷短路(lu)電(dian)(dian)流及(ji)變壓(ya)器空載電(dian)(dian)流，必定距離(li)架空線路(lu)、電(dian)(dian)纜線路(lu)的充電(dian)(dian)電(dian)(dian)流，起控制和保(bao)護效果，是環網供電(dian)(dian)和終(zhong)端供電(dian)(dian)的重要開關設備。

環(huan)網(wang)(wang)箱除了向本配電(dian)(dian)(dian)(dian)所(suo)供電(dian)(dian)(dian)(dian)外，其高(gao)壓母(mu)線(xian)還要(yao)經過環(huan)形供電(dian)(dian)(dian)(dian)網(wang)(wang)的穿(chuan)越電(dian)(dian)(dian)(dian)流（即經本配電(dian)(dian)(dian)(dian)所(suo)母(mu)線(xian)向相(xiang)鄰配電(dian)(dian)(dian)(dian)所(suo)供電(dian)(dian)(dian)(dian)的電(dian)(dian)(dian)(dian)流），因而(er)環(huan)網(wang)(wang)箱的高(gao)壓母(mu)線(xian)截面(mian)要(yao)根據本配電(dian)(dian)(dian)(dian)所(suo)的負荷電(dian)(dian)(dian)(dian)流于環(huan)網(wang)(wang)穿(chuan)越電(dian)(dian)(dian)(dian)流之和選(xuan)擇，以(yi)保(bao)證工作中高(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。環網箱通常不帶(dai)開關，主(zhu)要是實現電纜的分接和轉接，目前也有帶(dai)開關的環網箱(xiang)，有的地(di)方直接把帶(dai)開關的環網箱(xiang)稱(cheng)為(wei)戶外環網柜(ju)。