一、環網箱是什么

環網箱就(jiu)是每個(ge)配電(dian)支路設一臺開(kai)關柜（出(chu)線(xian)開(kai)關柜），這(zhe)臺開(kai)關柜的母(mu)線(xian)一同(tong)就(jiu)是環(huan)形(xing)干線(xian)的一部分。就(jiu)是說，環(huan)形(xing)干線(xian)是由(you)每臺出(chu)線(xian)柜的母(mu)線(xian)連接起來共同(tong)組(zu)成的。每臺出(chu)線(xian)柜叫“環(huan)網(wang)箱”，國外叫環(huan)網(wang)供電(dian)單(dan)元(yuan)。

二、環網箱的作用是什么

用于分合負荷電(dian)(dian)(dian)流(liu)，開斷(duan)短(duan)路(lu)電(dian)(dian)(dian)流(liu)及變壓器空載(zai)電(dian)(dian)(dian)流(liu)，必定距離架空線路(lu)、電(dian)(dian)(dian)纜線路(lu)的充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)，起控制和保護(hu)效果，是環網供(gong)電(dian)(dian)(dian)和終(zhong)端(duan)供(gong)電(dian)(dian)(dian)的重(zhong)要開關設備。

環(huan)網(wang)箱(xiang)除了(le)向本(ben)配電(dian)(dian)(dian)(dian)(dian)(dian)所供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)外，其高壓母(mu)線(xian)還要經過環(huan)形供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)網(wang)的穿(chuan)越電(dian)(dian)(dian)(dian)(dian)(dian)流（即經本(ben)配電(dian)(dian)(dian)(dian)(dian)(dian)所母(mu)線(xian)向相鄰(lin)配電(dian)(dian)(dian)(dian)(dian)(dian)所供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)的電(dian)(dian)(dian)(dian)(dian)(dian)流），因而環(huan)網(wang)箱(xiang)的高壓母(mu)線(xian)截面要根據本(ben)配電(dian)(dian)(dian)(dian)(dian)(dian)所的負荷電(dian)(dian)(dian)(dian)(dian)(dian)流于環(huan)網(wang)穿(chuan)越電(dian)(dian)(dian)(dian)(dian)(dian)流之和選擇，以保證工作中高壓母(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(tong)常不帶(dai)開(kai)關(guan)(guan)，主要是實現電纜的(de)(de)(de)分接和轉接，目前也有(you)帶(dai)開(kai)關(guan)(guan)的(de)(de)(de)環(huan)網箱，有(you)的(de)(de)(de)地方直接把帶(dai)開(kai)關(guan)(guan)的(de)(de)(de)環(huan)網箱稱(cheng)為(wei)戶(hu)外環(huan)網柜。