一、環網箱是什么

環網箱就是(shi)每(mei)個(ge)配電支路設(she)一(yi)臺(tai)開關柜（出(chu)線(xian)(xian)開關柜），這(zhe)臺(tai)開關柜的(de)(de)母(mu)線(xian)(xian)一(yi)同(tong)就是(shi)環(huan)(huan)形干(gan)線(xian)(xian)的(de)(de)一(yi)部分。就是(shi)說，環(huan)(huan)形干(gan)線(xian)(xian)是(shi)由每(mei)臺(tai)出(chu)線(xian)(xian)柜的(de)(de)母(mu)線(xian)(xian)連接起來共同(tong)組成的(de)(de)。每(mei)臺(tai)出(chu)線(xian)(xian)柜叫(jiao)“環(huan)(huan)網(wang)箱”，國外叫(jiao)環(huan)(huan)網(wang)供電單元。

二、環網箱的作用是什么

用于分(fen)合負(fu)荷電(dian)(dian)(dian)流(liu)，開(kai)斷短路電(dian)(dian)(dian)流(liu)及(ji)變壓(ya)器空(kong)載電(dian)(dian)(dian)流(liu)，必定距離架空(kong)線路、電(dian)(dian)(dian)纜線路的充電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)，起控制和保護效果(guo)，是(shi)環網供電(dian)(dian)(dian)和終端供電(dian)(dian)(dian)的重要開(kai)關設備。

環(huan)(huan)網(wang)箱除(chu)了向本配(pei)電(dian)(dian)(dian)所(suo)(suo)(suo)供(gong)電(dian)(dian)(dian)外(wai)，其高壓(ya)母線還要(yao)經(jing)過(guo)環(huan)(huan)形(xing)供(gong)電(dian)(dian)(dian)網(wang)的穿越電(dian)(dian)(dian)流(liu)（即經(jing)本配(pei)電(dian)(dian)(dian)所(suo)(suo)(suo)母線向相鄰(lin)配(pei)電(dian)(dian)(dian)所(suo)(suo)(suo)供(gong)電(dian)(dian)(dian)的電(dian)(dian)(dian)流(liu)），因而環(huan)(huan)網(wang)箱的高壓(ya)母線截面要(yao)根據本配(pei)電(dian)(dian)(dian)所(suo)(suo)(suo)的負荷電(dian)(dian)(dian)流(liu)于環(huan)(huan)網(wang)穿越電(dian)(dian)(dian)流(liu)之和(he)選擇，以保(bao)證(zheng)工(gong)作(zuo)中高壓(ya)母線不(bu)過(guo)負荷工(gong)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(dai)開關(guan)，主要(yao)是實現電(dian)纜的(de)分接和轉接，目前也有(you)帶(dai)開關(guan)的(de)環網箱(xiang)，有(you)的(de)地方直接把帶(dai)開關(guan)的(de)環網箱(xiang)稱為戶外環網柜。