跟着经济的开展和高压充气柜技能的前进，高压电容柜城网中选用电缆化供电已成为配电网开展的必然趋势，而环网供电以其经济性和可靠性成为配电网络电缆化的选择方式。城市配电网的开展使环网供电在用户供电计划中占的份额越来越大，而作为环网供电主设备的高压环网柜，则越来越遭到供电部分和用户的注重。环网柜的使用许多，首要使用于配电线路的开闭所、环网室、配电所、配电箱、预装式箱式变电站等，数量大、品种(zhong)多。

高压环网柜一般选用手动弹簧储能操作方法。当选用电动绷簧储能操作，并设有继电维护、信号要求功用的环网柜时，应根据要求供给沟通或直流二次电源，一般宜选用沟通弹簧储能操作方法。沟通二次电源可由电压互感器柜供给。小型体系宜选用手动弹簧储能操作方法。此刻，超温、瓦斯维护和信号显现所需的电源，因超温文瓦斯都是在变压器运转(zhuan)状况发作，为简化体系、节约出(chu)资，维护(hu)、信(xin)号电源可从变压器低压侧引出(chu)，与超温、瓦斯(si)信(xin)号线共用(yong)一根操(cao)控(kong)电缆引至环网柜(ju)。

高压(ya)环(huan)(huan)(huan)(huan)网(wang)(wang)(wang)柜是为提高供(gong)电(dian)(dian)(dian)(dian)(dian)可(ke)靠性，使(shi)(shi)用户(hu)可(ke)以从(cong)两个方(fang)向(xiang)获得电(dian)(dian)(dian)(dian)(dian)源，通(tong)常(chang)将(jiang)供(gong)电(dian)(dian)(dian)(dian)(dian)网(wang)(wang)(wang)连接成环(huan)(huan)(huan)(huan)形(xing)。这(zhei)种供(gong)电(dian)(dian)(dian)(dian)(dian)方(fang)式简称为环(huan)(huan)(huan)(huan)网(wang)(wang)(wang)供(gong)电(dian)(dian)(dian)(dian)(dian)。在(zai)港口(kou)和高层建筑等交(jiao)流(liu)10KV配(pei)电(dian)(dian)(dian)(dian)(dian)系统(tong)中(zhong)，因负载容不大，其高压(ya)回路(lu)通(tong)常(chang)采用负荷(he)开(kai)关(guan)或(huo)真(zhen)空接触器控制(zhi)，并配(pei)有高压(ya)熔断器保护。该系统(tong)通(tong)常(chang)采用环(huan)(huan)(huan)(huan)形(xing)网(wang)(wang)(wang)供(gong)电(dian)(dian)(dian)(dian)(dian)，所(suo)(suo)使(shi)(shi)用高压(ya)开(kai)关(guan)柜一般习(xi)惯(guan)上(shang)称为环(huan)(huan)(huan)(huan)网(wang)(wang)(wang)柜。环(huan)(huan)(huan)(huan)网(wang)(wang)(wang)柜除了(le)向(xiang)本(ben)配(pei)电(dian)(dian)(dian)(dian)(dian)所(suo)(suo)供(gong)电(dian)(dian)(dian)(dian)(dian)外，其高压(ya)母(mu)线(xian)还要通(tong)过环(huan)(huan)(huan)(huan)形(xing)供(gong)电(dian)(dian)(dian)(dian)(dian)网(wang)(wang)(wang)的(de)穿越电(dian)(dian)(dian)(dian)(dian)流(liu)（即经本(ben)配(pei)电(dian)(dian)(dian)(dian)(dian)所(suo)(suo)母(mu)线(xian)向(xiang)相邻配(pei)电(dian)(dian)(dian)(dian)(dian)所(suo)(suo)供(gong)电(dian)(dian)(dian)(dian)(dian)的(de)电(dian)(dian)(dian)(dian)(dian)流(liu)），因此环(huan)(huan)(huan)(huan)网(wang)(wang)(wang)柜的(de)高压(ya)母(mu)线(xian)截面要根据本(ben)配(pei)电(dian)(dian)(dian)(dian)(dian)所(suo)(suo)的(de)负荷(he)电(dian)(dian)(dian)(dian)(dian)流(liu)与环(huan)(huan)(huan)(huan)网(wang)(wang)(wang)穿越电(dian)(dian)(dian)(dian)(dian)流(liu)之和选择。