變(bian)(bian)壓(ya)(ya)器(qi)(qi)可用(yong)(yong)(yong)汽(qi)車(che)吊直接甩(shuai)進(jin)變(bian)(bian)壓(ya)(ya)器(qi)(qi)室內，或(huo)用(yong)(yong)(yong)道木搭(da)設臨時軌(gui)道，用(yong)(yong)(yong)三步(bu)搭(da)、吊鏈吊至臨時軌(gui)道上(shang)(shang)，然(ran)后用(yong)(yong)(yong)吊鏈拉入室內合適位(wei)置。變(bian)(bian)壓(ya)(ya)器(qi)(qi)應注(zhu)意(yi)其方位(wei)和距(ju)墻(qiang)尺寸與圖紙相符，允許誤差為±25mm，圖紙無標注(zhu)時，橫(heng)向距(ju)墻(qiang)不(bu)得小于(yu)800mm，距(ju)門不(bu)得小于(yu)1000mm。變(bian)(bian)壓(ya)(ya)器(qi)(qi)臺架(jia)的安裝：雙(shuang)桿柱上(shang)(shang)安裝變(bian)(bian)壓(ya)(ya)器(qi)(qi)，兩(liang)桿的根開為2m。埋深2m。配(pei)電(dian)變(bian)(bian)壓(ya)(ya)器(qi)(qi)臺架(jia)用(yong)(yong)(yong)兩(liang)條(tiao)或(huo)四條(tiao)槽鋼固定于(yu)兩(liang)電(dian)桿上(shang)(shang)，臺架(jia)距(ju)地面(mian)高度不(bu)低(di)于(yu)2.5m，臺架(jia)的平面(mian)坡度不(bu)大于(yu)1/100。腰欄應采用(yong)(yong)(yong)直徑不(bu)小于(yu)4mm的鐵線纏繞(rao)(rao)兩(liang)圈(quan)以(yi)上(shang)(shang)，纏繞(rao)(rao)應緊牢，腰欄距(ju)帶電(dian)部分不(bu)少(shao)于(yu)0.2m。同時變(bian)(bian)壓(ya)(ya)器(qi)(qi)高壓(ya)(ya)柱頭加裝防塵罩，變(bian)(bian)壓(ya)(ya)器(qi)(qi)懸掛警告牌。

　　跌落式熔斷器的安裝

　　變(bian)壓(ya)(ya)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)高、低(di)(di)壓(ya)(ya)側(ce)應(ying)分別裝設熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)。高壓(ya)(ya)側(ce)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)底部(bu)對地面的(de)(de)(de)(de)(de)垂(chui)直(zhi)高度不低(di)(di)于(yu)(yu)(yu)4.5m，各相熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)水平距(ju)離不應(ying)小于(yu)(yu)(yu)0.5m，為了(le)便于(yu)(yu)(yu)操作和熔(rong)(rong)(rong)絲熔(rong)(rong)(rong)斷(duan)(duan)后熔(rong)(rong)(rong)絲管能順利(li)地跌(die)落(luo)(luo)下來(lai)，跌(die)落(luo)(luo)式(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)軸線(xian)應(ying)與(yu)垂(chui)直(zhi)線(xian)成15°～30°傾角(jiao)。低(di)(di)壓(ya)(ya)側(ce)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)底部(bu)對地面的(de)(de)(de)(de)(de)垂(chui)直(zhi)距(ju)離不低(di)(di)于(yu)(yu)(yu)5m，各相熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)水平距(ju)離不少于(yu)(yu)(yu)0.2m。跌(die)落(luo)(luo)式(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)熔(rong)(rong)(rong)絲的(de)(de)(de)(de)(de)選(xuan)擇(ze)按(an)“保(bao)證(zheng)配電(dian)(dian)(dian)變(bian)壓(ya)(ya)器(qi)(qi)(qi)內(nei)部(bu)或(huo)(huo)高、低(di)(di)壓(ya)(ya)出(chu)線(xian)套管發(fa)生短路時(shi)迅速熔(rong)(rong)(rong)斷(duan)(duan)”的(de)(de)(de)(de)(de)原則來(lai)選(xuan)擇(ze)，熔(rong)(rong)(rong)絲的(de)(de)(de)(de)(de)熔(rong)(rong)(rong)斷(duan)(duan)時(shi)間(jian)小于(yu)(yu)(yu)或(huo)(huo)等于(yu)(yu)(yu)0.1s。按(an)規(gui)程規(gui)定(ding)：容(rong)量在100kVA及以(yi)下者，高壓(ya)(ya)側(ce)熔(rong)(rong)(rong)絲額(e)(e)定(ding)電(dian)(dian)(dian)流按(an)變(bian)壓(ya)(ya)器(qi)(qi)(qi)容(rong)量額(e)(e)定(ding)電(dian)(dian)(dian)流的(de)(de)(de)(de)(de)2～3倍選(xuan)擇(ze)；容(rong)量在100kVA以(yi)上(shang)者，高壓(ya)(ya)側(ce)熔(rong)(rong)(rong)絲額(e)(e)定(ding)電(dian)(dian)(dian)流按(an)變(bian)壓(ya)(ya)器(qi)(qi)(qi)容(rong)量額(e)(e)定(ding)電(dian)(dian)(dian)流的(de)(de)(de)(de)(de)1.5～2倍選(xuan)擇(ze)。變(bian)壓(ya)(ya)器(qi)(qi)(qi)低(di)(di)壓(ya)(ya)側(ce)熔(rong)(rong)(rong)絲按(an)低(di)(di)壓(ya)(ya)側(ce)額(e)(e)定(ding)電(dian)(dian)(dian)流選(xuan)擇(ze)。

　　避雷器的安裝

　　選用(yong)無間隙(xi)合(he)成絕緣外(wai)套(tao)金屬氧化物避雷器(qi)。避雷器(qi)應(ying)裝(zhuang)設在(zai)熔斷器(qi)與變(bian)壓(ya)器(qi)之間，并盡量靠(kao)近變(bian)壓(ya)器(qi)。另(ling)外(wai)，為(wei)了防止反變(bian)換(huan)波和低(di)壓(ya)側雷電波侵入，在(zai)低(di)壓(ya)側也應(ying)裝(zhuang)設低(di)壓(ya)避雷器(qi)。為(wei)避免(mian)雷電流在(zai)接(jie)地(di)電阻上(shang)的(de)壓(ya)降與避雷器(qi)的(de)殘壓(ya)疊加在(zai)一起，作(zuo)用(yong)在(zai)變(bian)壓(ya)器(qi)絕緣上(shang)，應(ying)將(jiang)避雷器(qi)的(de)接(jie)地(di)端(duan)、變(bian)壓(ya)器(qi)的(de)外(wai)殼及低(di)壓(ya)側中性點用(yong)截(jie)面不小于25mm2的(de)多股銅(tong)芯塑料線連接(jie)在(zai)一起，再與接(jie)地(di)裝(zhuang)置(zhi)引(yin)上(shang)線相連接(jie)。

　　接地裝置

　　對10kV配電(dian)(dian)(dian)(dian)變(bian)壓器：容量在100kVA以下，其(qi)(qi)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)電(dian)(dian)(dian)(dian)阻不應(ying)(ying)大于(yu)10Ω；容量在100kVA以上，其(qi)(qi)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)電(dian)(dian)(dian)(dian)阻不應(ying)(ying)大于(yu)4Ω。接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)裝置(zhi)施工完畢應(ying)(ying)進行(xing)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)電(dian)(dian)(dian)(dian)阻測試(shi)，合格(ge)后方(fang)可(ke)回填(tian)土。同時(shi)，變(bian)壓器外殼良好接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)，外殼接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)應(ying)(ying)用(yong)螺栓擰緊，不可(ke)用(yong)焊(han)接(jie)(jie)(jie)(jie)(jie)(jie)直接(jie)(jie)(jie)(jie)(jie)(jie)焊(han)牢(lao)，以便檢修。接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)裝置(zhi)的(de)地(di)(di)下部分由水(shui)平(ping)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)和(he)垂直接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)組成，水(shui)平(ping)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)采(cai)(cai)用(yong)6根長度(du)(du)為(wei)(wei)6m的(de)40×4mm的(de)扁鋼，垂直接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)則采(cai)(cai)用(yong)10-6根長度(du)(du)為(wei)(wei)2m的(de)L50×50×5mm的(de)角鋼分別(bie)與水(shui)平(ping)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)焊(han)接(jie)(jie)(jie)(jie)(jie)(jie)。水(shui)平(ping)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)在土壤中(zhong)埋設深為(wei)(wei)0.6～0.8m，垂直接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)則是在水(shui)平(ping)接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)體(ti)基礎上打(da)入地(di)(di)里的(de)。接(jie)(jie)(jie)(jie)(jie)(jie)地(di)(di)引上線采(cai)(cai)用(yong)40×4mm扁鋼，為(wei)(wei)了檢測方(fang)便和(he)用(yong)電(dian)(dian)(dian)(dian)，對于(yu)柱上式安裝的(de)變(bian)壓器，引上線連接(jie)(jie)(jie)(jie)(jie)(jie)點應(ying)(ying)設在變(bian)壓器底下的(de)槽鋼位置(zhi)。

　　變臺引落線

　　新(xin)建和改(gai)造(zao)的(de)(de)變臺(tai)的(de)(de)引(yin)落線(xian)均應(ying)(ying)采用多股絕(jue)緣線(xian)，其截面應(ying)(ying)按變壓(ya)(ya)器(qi)的(de)(de)額定(ding)容量選擇，但高壓(ya)(ya)側引(yin)落線(xian)銅芯不應(ying)(ying)小于(yu)(yu)16mm2，鋁(lv)芯不應(ying)(ying)小于(yu)(yu)25mm2，杜絕(jue)使用單股導線(xian)及不合格導線(xian)。同時應(ying)(ying)考慮引(yin)落線(xian)對周圍建筑物的(de)(de)距離。