在(zai)農(nong)網10kV配(pei)(pei)電(dian)(dian)線路分(fen)支(zhi)線和額定(ding)容量小于200kVA的(de)(de)(de)配(pei)(pei)電(dian)(dian)變(bian)壓器(qi)允許按下列(lie)要求帶(dai)負荷(he)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)：(1)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)時(shi)(shi)由(you)兩(liang)人進(jin)行(xing)(一(yi)(yi)(yi)人監護，一(yi)(yi)(yi)人操(cao)(cao)作(zuo)(zuo)(zuo)(zuo))，但必須戴經試驗合(he)(he)格的(de)(de)(de)絕(jue)緣手套，穿(chuan)絕(jue)緣靴(xue)、戴護目眼鏡，使(shi)用(yong)(yong)(yong)電(dian)(dian)壓等級相(xiang)匹(pi)配(pei)(pei)的(de)(de)(de)合(he)(he)格絕(jue)緣棒操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)，在(zai)雷電(dian)(dian)或者大雨的(de)(de)(de)氣候下禁止操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)。 　　跌落式熔斷器(qi)的(de)(de)(de)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)一(yi)(yi)(yi)般情況下不允許帶(dai)負荷(he)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)跌落式熔斷器(qi)，只允許其操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)空載設備(線路)。(2)在(zai)拉(la)(la)(la)閘(zha)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)時(shi)(shi)，一(yi)(yi)(yi)般規(gui)定(ding)為(wei)(wei)先(xian)(xian)拉(la)(la)(la)斷中(zhong)間相(xiang)，再(zai)(zai)拉(la)(la)(la)背風(feng)的(de)(de)(de)邊相(xiang)， 拉(la)(la)(la)斷迎風(feng)的(de)(de)(de)邊相(xiang)。這是因為(wei)(wei)配(pei)(pei)電(dian)(dian)變(bian)壓器(qi)由(you)三相(xiang)運行(xing)改為(wei)(wei)兩(liang)相(xiang)運行(xing)，拉(la)(la)(la)斷中(zhong)間相(xiang)時(shi)(shi)所產(chan)(chan)生的(de)(de)(de)電(dian)(dian)弧火花小，不致(zhi)造(zao)成(cheng)相(xiang)間短(duan)路。 　　其次是拉(la)(la)(la)斷背風(feng)邊相(xiang)，因為(wei)(wei)中(zhong)間相(xiang)已(yi)被拉(la)(la)(la)開(kai)，背風(feng)邊相(xiang)與迎風(feng)邊相(xiang)的(de)(de)(de)距離增加了一(yi)(yi)(yi)倍，即(ji)使(shi)有過(guo)電(dian)(dian)壓產(chan)(chan)生，造(zao)成(cheng)相(xiang)間短(duan)路的(de)(de)(de)可(ke)能性(xing)也很小。 拉(la)(la)(la)斷迎風(feng)邊相(xiang)時(shi)(shi)，僅有對地的(de)(de)(de)電(dian)(dian)容電(dian)(dian)流，產(chan)(chan)生的(de)(de)(de)電(dian)(dian)火花則已(yi)很輕微。(3)合(he)(he)閘(zha)的(de)(de)(de)時(shi)(shi)候操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)順序拉(la)(la)(la)閘(zha)時(shi)(shi)相(xiang)反，先(xian)(xian)合(he)(he)迎風(feng)邊相(xiang)，再(zai)(zai)合(he)(he)背風(feng)的(de)(de)(de)邊相(xiang)， 合(he)(he)上中(zhong)間相(xiang)。 　　(4)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)熔管(guan)是一(yi)(yi)(yi)項(xiang)頻繁的(de)(de)(de)項(xiang)目，注意不到便會造(zao)成(cheng)觸(chu)頭(tou)燒傷引起(qi)接(jie)觸(chu)不良，使(shi)觸(chu)頭(tou)過(guo)熱，彈簧退火，促使(shi)觸(chu)頭(tou)接(jie)觸(chu)更為(wei)(wei)不良，形(xing)成(cheng)惡性(xing)循環。所以，拉(la)(la)(la)、合(he)(he)熔管(guan)時(shi)(shi)要用(yong)(yong)(yong)力適(shi)度(du)，合(he)(he)好(hao)(hao)后，要仔細檢(jian)查鴨嘴舌頭(tou)能緊緊扣(kou)住舌頭(tou)長度(du)三分(fen)之(zhi)二以上，可(ke)用(yong)(yong)(yong)拉(la)(la)(la)閘(zha)桿鉤住上鴨嘴向下壓幾下，再(zai)(zai)輕輕試拉(la)(la)(la)，檢(jian)查是否合(he)(he)好(hao)(hao)。

戶外跌(die)落(luo)式(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)適用(yong)(yong)(yong)于(yu)(yu)交流(liu)(liu)(liu)50HZ，額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)10kV~35KV的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)力(li)系統中，作輸(shu)配(pei)電(dian)(dian)(dian)(dian)線(xian)(xian)路和(he)電(dian)(dian)(dian)(dian)力(li)變壓(ya)(ya)(ya)器(qi)(qi)的(de)(de)(de)(de)過(guo)載和(he)短路保(bao)護(hu)以(yi)及分、合額(e)(e)定(ding)(ding)負荷(he)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)之(zhi)用(yong)(yong)(yong)廣(guang)泛使用(yong)(yong)(yong)的(de)(de)(de)(de)戶外跌(die)落(luo)式(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)型(xing)號有RW7型(xing)和(he)RW11型(xing)兩(liang)種。 在現實的(de)(de)(de)(de)10kV~35KV線(xian)(xian)路系統中和(he)配(pei)電(dian)(dian)(dian)(dian)變壓(ya)(ya)(ya)器(qi)(qi)上(shang)的(de)(de)(de)(de)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)不(bu)能正(zheng)確動作，其原因之(zhi)一(yi)是(shi)，電(dian)(dian)(dian)(dian)工素質(zhi)差，責(ze)任(ren)心不(bu)強，常年(nian)不(bu)進(jin)行(xing)跌(die)落(luo)式(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)維護(hu)和(he)檢修；原因之(zhi)二是(shi)，跌(die)落(luo)式(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)產(chan)品質(zhi)量低劣(lie)，不(bu)能靈(ling)活的(de)(de)(de)(de)拉、合操作。 兩(liang)原因降低了(le)跌(die)落(luo)式(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)功能。現實中經常出現缺熔(rong)(rong)管、缺熔(rong)(rong)體(ti)或(huo)用(yong)(yong)(yong)銅絲(si)(si)(si)、鋁絲(si)(si)(si)甚至于(yu)(yu)鐵(tie)絲(si)(si)(si)勾掛代替熔(rong)(rong)體(ti)的(de)(de)(de)(de)情況(kuang)。使得線(xian)(xian)路的(de)(de)(de)(de)跳閘率和(he)配(pei)電(dian)(dian)(dian)(dian)變壓(ya)(ya)(ya)器(qi)(qi)的(de)(de)(de)(de)故障率居高不(bu)下(xia)。10kV~35KV跌(die)落(luo)式(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)適用(yong)(yong)(yong)于(yu)(yu)環境空氣無(wu)(wu)導電(dian)(dian)(dian)(dian)塵、無(wu)(wu)腐蝕性氣體(ti)及易燃、易爆等危險(xian)性環境，年(nian)度溫差變比在±40℃以(yi)內的(de)(de)(de)(de)戶外場所。　其選擇是(shi)按(an)照額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)和(he)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)兩(liang)項參數進(jin)行(xing)，也就是(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)必須與被保(bao)護(hu)設備(線(xian)(xian)路)的(de)(de)(de)(de)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)相匹(pi)配(pei)。熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)具的(de)(de)(de)(de)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)應大于(yu)(yu)或(huo)等于(yu)(yu)熔(rong)(rong)體(ti)的(de)(de)(de)(de)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。而熔(rong)(rong)體(ti)的(de)(de)(de)(de)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)可選為(wei)額(e)(e)定(ding)(ding)負荷(he)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)1.5～2倍。