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箱变是将高低压一次设备、变压器、二次设备在(zai)工厂(chang)内集成在(zai)一个(ge)双层、密封、防腐(fu)、可移动的户外箱。
箱式(shi)(shi)变(bian)电(dian)(dian)(dian)(dian)站(zhan)(zhan),又(you)叫预装(zhuang)(zhuang)式(shi)(shi)变(bian)电(dian)(dian)(dian)(dian)所或预装(zhuang)(zhuang)式(shi)(shi)变(bian)电(dian)(dian)(dian)(dian)站(zhan)(zhan)。是一(yi)(yi)(yi)种(zhong)高(gao)压(ya)开关(guan)设(she)备、配(pei)电(dian)(dian)(dian)(dian)变(bian)压(ya)器(qi)和(he)低(di)压(ya)配(pei)电(dian)(dian)(dian)(dian)装(zhuang)(zhuang)置(zhi),按接线(xian)方案(an)排成一(yi)(yi)(yi)体(ti)的(de)工厂预制(zhi)户(hu)内(nei)、户(hu)外(wai)紧凑式(shi)(shi)配(pei)电(dian)(dian)(dian)(dian)设(she)备,将变(bian)压(ya)器(qi)降压(ya)、低(di)压(ya)配(pei)电(dian)(dian)(dian)(dian)等功(gong)能组合在一(yi)(yi)(yi)起,安装(zhuang)(zhuang)在一(yi)(yi)(yi)个(ge)防(fang)潮、防(fang)锈、防(fang)尘(chen)、防(fang)鼠、防(fang)火、防(fang)盗、隔热、全封闭(bi)、可移动的(de)钢结构箱,适用(yong)于(yu)(yu)城(cheng)网(wang)建设(she)与改造,是继土建变(bian)电(dian)(dian)(dian)(dian)站(zhan)(zhan)之(zhi)后崛起的(de)一(yi)(yi)(yi)种(zhong)新的(de)变(bian)电(dian)(dian)(dian)(dian)站(zhan)(zhan)。箱式(shi)(shi)变(bian)电(dian)(dian)(dian)(dian)站(zhan)(zhan)适用(yong)于(yu)(yu)矿山、工厂企业、油气田(tian)和(he)风(feng)力发(fa)电(dian)(dian)(dian)(dian)站(zhan)(zhan),它替代(dai)了(le)原(yuan)有的(de)土建配(pei)电(dian)(dian)(dian)(dian)房,配(pei)电(dian)(dian)(dian)(dian)站(zhan)(zhan),成为新型(xing)的(de)成套变(bian)配(pei)电(dian)(dian)(dian)(dian)装(zhuang)(zhuang)置(zhi)。
箱变的结构
箱变的总体结构(gou)主要(yao)分为高压(ya)开关设备、变压(ya)器及低压(ya)配电装置(zhi)三大部分。
根据(ju)系统需要(yao),高压开关可选用六氟(fu)化硫(liu)或真空断路器(qi)、环网开关、负荷开关加熔断器(qi)。
还可在高压侧(ce)加(jia)装(zhuang)计(ji)量装(zhuang)置(zhi)。低(di)压侧(ce)一(yi)(yi)般安(an)装(zhuang)有总开(kai)关及分(fen)路馈线开(kai)关,也有的只(zhi)安(an)装(zhuang)馈线开(kai)关.向低(di)压终端用户直接(jie)馈电。还可装(zhuang)补(bu)偿(chang)电容器(qi)、计(ji)量装(zhuang)置(zhi)等。配电变压器(qi)一(yi)(yi)般选(xuan)用油浸式或干式变压器(qi)。
普通箱式变电所型号分为(wei)三类
(1)高压开关设备型号;
(2)干式变压器(qi)柜型号(hao);
(3)低压开关设备型号。
前三位字母符(fu)号的意义是:
Z-组合式(shi);B-变电站(zhan);N(W)-户(hu)(hu)内(户(hu)(hu)外,可不加);X-箱式(shi);Y-移动式(shi)。
箱变的运行与维护
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