包(bao)括電(dian)(dian)(dian)網）都有一(yi)(yi)定的(de)(de)過(guo)載(zai)(zai)能力，當(dang)過(guo)載(zai)(zai)較輕時(shi)(shi)(shi)(shi)(shi)可以允(yun)許較長時(shi)(shi)(shi)(shi)(shi)間(jian)運行，而超過(guo)某一(yi)(yi)過(guo)載(zai)(zai)倍數(shu)時(shi)(shi)(shi)(shi)(shi)，相應(ying)要(yao)求(qiu)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)在(zai)一(yi)(yi)定時(shi)(shi)(shi)(shi)(shi)間(jian)內熔(rong)(rong)(rong)斷(duan)。選(xuan)擇(ze)(ze)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)保(bao)(bao)護(hu)(hu)(hu)過(guo)載(zai)(zai)和短(duan)(duan)(duan)路(lu)，必須了解用(yong)電(dian)(dian)(dian)設(she)備(bei)的(de)(de)過(guo)載(zai)(zai)特(te)(te)性(xing)，使這一(yi)(yi)特(te)(te)性(xing)恰(qia)當(dang)地處(chu)在(zai)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)秒(miao)-安(an)特(te)(te)性(xing)的(de)(de)保(bao)(bao)護(hu)(hu)(hu)范圍之內。熔(rong)(rong)(rong)斷(duan)電(dian)(dian)(dian)流(liu)Io的(de)(de)熔(rong)(rong)(rong)斷(duan)時(shi)(shi)(shi)(shi)(shi)間(jian)在(zai)理論上是(shi)無限大的(de)(de)，稱(cheng)為小(xiao)(xiao)融(rong)化(hua)(hua)電(dian)(dian)(dian)流(liu)或臨(lin)界(jie)電(dian)(dian)(dian)流(liu)，即通(tong)(tong)過(guo)熔(rong)(rong)(rong)體(ti)(ti)(ti)的(de)(de)電(dian)(dian)(dian)流(liu)小(xiao)(xiao)于(yu)臨(lin)界(jie)值就(jiu)不(bu)會熔(rong)(rong)(rong)斷(duan)。所(suo)以選(xuan)擇(ze)(ze)熔(rong)(rong)(rong)體(ti)(ti)(ti)的(de)(de)額定電(dian)(dian)(dian)流(liu)Ie應(ying)小(xiao)(xiao)于(yu)Io；通(tong)(tong)常取Io與(yu)Ie的(de)(de)比值為～，稱(cheng)作熔(rong)(rong)(rong)化(hua)(hua)系(xi)數(shu)。該系(xi)數(shu)反映熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)在(zai)過(guo)載(zai)(zai)時(shi)(shi)(shi)(shi)(shi)的(de)(de)不(bu)同保(bao)(bao)護(hu)(hu)(hu)特(te)(te)性(xing)，如要(yao)使熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)能保(bao)(bao)護(hu)(hu)(hu)小(xiao)(xiao)過(guo)載(zai)(zai)電(dian)(dian)(dian)流(liu)，融(rong)化(hua)(hua)系(xi)數(shu)就(jiu)應(ying)該低些；為了避免電(dian)(dian)(dian)動機起(qi)動時(shi)(shi)(shi)(shi)(shi)的(de)(de)短(duan)(duan)(duan)時(shi)(shi)(shi)(shi)(shi)過(guo)電(dian)(dian)(dian)流(liu)使熔(rong)(rong)(rong)體(ti)(ti)(ti)熔(rong)(rong)(rong)化(hua)(hua)，融(rong)化(hua)(hua)系(xi)數(shu)就(jiu)應(ying)高些。快(kuai)速熔(rong)(rong)(rong)器(qi)(qi)(qi)電(dian)(dian)(dian)流(liu)通(tong)(tong)過(guo)能力滿足系(xi)統短(duan)(duan)(duan)路(lu)電(dian)(dian)(dian)流(liu)的(de)(de)要(yao)求(qiu)后，發生短(duan)(duan)(duan)路(lu)故障(zhang)時(shi)(shi)(shi)(shi)(shi)可以隔離故障(zhang)電(dian)(dian)(dian)流(liu)，但能否保(bao)(bao)護(hu)(hu)(hu)所(suo)串(chuan)聯的(de)(de)半導體(ti)(ti)(ti)器(qi)(qi)(qi)件則必須分析二(er)者的(de)(de)I2t值。只有當(dang)快(kuai)速熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)I2t值小(xiao)(xiao)于(yu)半導體(ti)(ti)(ti)器(qi)(qi)(qi)件I2t值時(shi)(shi)(shi)(shi)(shi)，才能對(dui)半導體(ti)(ti)(ti)器(qi)(qi)(qi)件起(qi)到保(bao)(bao)護(hu)(hu)(hu)作用(yong)。短(duan)(duan)(duan)路(lu)故障(zhang)時(shi)(shi)(shi)(shi)(shi)I2t值分為兩個(ge)階段，即弧(hu)(hu)(hu)前(qian)I2t和熔(rong)(rong)(rong)斷(duan)I2t。熔(rong)(rong)(rong)體(ti)(ti)(ti)金屬從(cong)固(gu)態轉為液態的(de)(de)時(shi)(shi)(shi)(shi)(shi)間(jian)是(shi)弧(hu)(hu)(hu)前(qian)時(shi)(shi)(shi)(shi)(shi)間(jian)，大約(yue)～，可以認為是(shi)絕熱過(guo)程，此(ci)時(shi)(shi)(shi)(shi)(shi)間(jian)段快(kuai)速熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)產(chan)生的(de)(de)電(dian)(dian)(dian)流(liu)時(shi)(shi)(shi)(shi)(shi)間(jian)積分可以認為是(shi)一(yi)(yi)定值，由設(she)計來確定。弧(hu)(hu)(hu)前(qian)I2t值對(dui)于(yu)不(bu)同的(de)(de)材料其值也(ye)不(bu)同。作為短(duan)(duan)(duan)路(lu)和過(guo)電(dian)(dian)(dian)流(liu)的(de)(de)保(bao)(bao)護(hu)(hu)(hu)器(qi)(qi)(qi)，是(shi)應(ying)用(yong)普(pu)遍(bian)的(de)(de)保(bao)(bao)護(hu)(hu)(hu)器(qi)(qi)(qi)件之一(yi)(yi)。北京貿(mao)易日本京山(shan)KYOSAN熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)現(xian)貨

一(yi)般用(yong)(yong)途熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)分(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)范(fan)(fan)圍(wei)(wei)(wei)指(zhi)從過(guo)(guo)載(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)大于(yu)額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)～2倍起(qi)，到大分(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)范(fan)(fan)圍(wei)(wei)(wei)。這種(zhong)(zhong)熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)主要用(yong)(yong)于(yu)保(bao)護(hu)電(dian)(dian)(dian)(dian)(dian)力變壓(ya)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)和一(yi)般電(dian)(dian)(dian)(dian)(dian)氣設備。后備熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)分(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)范(fan)(fan)圍(wei)(wei)(wei)指(zhi)從過(guo)(guo)載(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)大于(yu)額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)4～7倍起(qi)分(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)范(fan)(fan)圍(wei)(wei)(wei)。這種(zhong)(zhong)熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)常(chang)與接(jie)觸(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)串(chuan)聯(lian)使(shi)(shi)用(yong)(yong)，在過(guo)(guo)載(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)小(xiao)于(yu)額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)4～7倍的(de)(de)(de)范(fan)(fan)圍(wei)(wei)(wei)時(shi)，由(you)接(jie)觸(chu)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)來實現(xian)分(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)保(bao)護(hu)。主要用(yong)(yong)于(yu)保(bao)護(hu)電(dian)(dian)(dian)(dian)(dian)動(dong)機。隨著工(gong)業發(fa)(fa)展的(de)(de)(de)需要，還制(zhi)造出適于(yu)各種(zhong)(zhong)不同要求(qiu)的(de)(de)(de)特(te)殊熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)，如電(dian)(dian)(dian)(dian)(dian)子熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)、熱熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)和自(zi)復熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)等(deng)。熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)級(ji)間(jian)配(pei)合編輯(ji)為防止(zhi)發(fa)(fa)生越級(ji)熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)、擴大事(shi)故(gu)(gu)范(fan)(fan)圍(wei)(wei)(wei)，上(shang)、下級(ji)（即供(gong)電(dian)(dian)(dian)(dian)(dian)干、支(zhi)線(xian)(xian)）線(xian)(xian)路(lu)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)間(jian)應(ying)(ying)有(you)良好配(pei)合。選用(yong)(yong)時(shi)，應(ying)(ying)使(shi)(shi)上(shang)級(ji)（供(gong)電(dian)(dian)(dian)(dian)(dian)干線(xian)(xian)）熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)比(bi)下級(ji)（供(gong)電(dian)(dian)(dian)(dian)(dian)支(zhi)線(xian)(xian)）的(de)(de)(de)大1～2個級(ji)差。常(chang)用(yong)(yong)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)有(you)管(guan)式熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)R1系(xi)列(lie)、螺旋式熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)RLl系(xi)列(lie)、填料封閉(bi)式熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)RT0系(xi)列(lie)及快速熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)RSO、RS3系(xi)列(lie)等(deng)。熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)使(shi)(shi)用(yong)(yong)維護(hu)編輯(ji)低壓(ya)配(pei)電(dian)(dian)(dian)(dian)(dian)系(xi)統(tong)中熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)是起(qi)安全保(bao)護(hu)作(zuo)用(yong)(yong)的(de)(de)(de)一(yi)種(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)，熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)應(ying)(ying)用(yong)(yong)于(yu)電(dian)(dian)(dian)(dian)(dian)網(wang)保(bao)護(hu)和用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)設備保(bao)護(hu)，當電(dian)(dian)(dian)(dian)(dian)網(wang)或(huo)(huo)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)設備發(fa)(fa)生短路(lu)故(gu)(gu)障或(huo)(huo)過(guo)(guo)載(zai)時(shi)，可自(zi)動(dong)切斷(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)路(lu)，避免(mian)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)設備損壞(huai)，防止(zhi)事(shi)故(gu)(gu)蔓(man)延。熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)由(you)絕緣底座（或(huo)(huo)支(zhi)持件(jian)）、觸(chu)頭(tou)、熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)等(deng)組成(cheng)，熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)是熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)主要工(gong)作(zuo)部分(fen)。北京貿易日本京山KYOSAN熔(rong)(rong)(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)(qi)現(xian)貨雖然該電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)受外界(jie)環(huan)境的(de)(de)(de)影響，但(dan)在實際應(ying)(ying)用(yong)(yong)中可以不加考慮。

用戶在(zai)使用前應(ying)向制(zhi)造(zao)廠垂詢。風(feng)冷也(ye)是一(yi)(yi)種減少溫(wen)升的(de)(de)(de)(de)(de)(de)(de)有(you)(you)(you)效方法，根據(ju)風(feng)速(su)(su)(su)(su)通(tong)過能(neng)力(li)(li)(li)曲線來確(que)定(ding)風(feng)速(su)(su)(su)(su)對(dui)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)溫(wen)升的(de)(de)(de)(de)(de)(de)(de)影(ying)響，風(feng)速(su)(su)(su)(su)約5m/s時一(yi)(yi)般(ban)可以(yi)(yi)提高(gao)25%的(de)(de)(de)(de)(de)(de)(de)通(tong)流能(neng)力(li)(li)(li)，風(feng)速(su)(su)(su)(su)若再增加將不會有(you)(you)(you)明顯的(de)(de)(de)(de)(de)(de)(de)作用。根據(ju)制(zhi)造(zao)廠提供的(de)(de)(de)(de)(de)(de)(de)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)電(dian)壓降曲線以(yi)(yi)及額(e)定(ding)電(dian)流下的(de)(de)(de)(de)(de)(de)(de)功(gong)耗，測量快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)兩(liang)極(ji)端(duan)子(zi)間的(de)(de)(de)(de)(de)(de)(de)電(dian)壓降可以(yi)(yi)快(kuai)(kuai)速(su)(su)(su)(su)計算出該支路的(de)(de)(de)(de)(de)(de)(de)實(shi)際電(dian)流。另(ling)外，在(zai)同(tong)樣(yang)的(de)(de)(de)(de)(de)(de)(de)通(tong)流情況下，溫(wen)升還與快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)是否采用單一(yi)(yi)或雙(shuang)并(bing)有(you)(you)(you)關(guan)。先進工業國(guo)家制(zhi)造(zao)的(de)(de)(de)(de)(de)(de)(de)大(da)(da)功(gong)率整流裝置中(zhong)多采用快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)雙(shuang)并(bing)與半導體(ti)器(qi)(qi)(qi)(qi)件串(chuan)聯，如(ru)700A×2、1400A×2、2500A×2。雙(shuang)并(bing)結構的(de)(de)(de)(de)(de)(de)(de)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)端(duan)子(zi)可以(yi)(yi)盡量減薄，以(yi)(yi)減小電(dian)阻(zu)。有(you)(you)(you)一(yi)(yi)類(lei)雙(shuang)并(bing)連(lian)接的(de)(de)(de)(de)(de)(de)(de)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)靠(kao)螺栓和連(lian)板連(lian)接，另(ling)一(yi)(yi)類(lei)是連(lian)板（端(duan)子(zi)）與2個熔(rong)(rong)(rong)體(ti)（端(duan)子(zi)）焊為一(yi)(yi)體(ti)的(de)(de)(de)(de)(de)(de)(de)結構，此類(lei)結構比較先進。電(dian)壓較高(gao)的(de)(de)(de)(de)(de)(de)(de)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)其(qi)內阻(zu)較大(da)(da)，尤其(qi)是800V以(yi)(yi)上(shang)(shang)產(chan)品(pin)，由(you)于外殼瓷套有(you)(you)(you)一(yi)(yi)定(ding)的(de)(de)(de)(de)(de)(de)(de)長度(du)，表(biao)面積較大(da)(da)，而熔(rong)(rong)(rong)體(ti)產(chan)生的(de)(de)(de)(de)(de)(de)(de)熱量經由(you)填(tian)(tian)料、外殼傳導散熱，故電(dian)壓高(gao)的(de)(de)(de)(de)(de)(de)(de)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)風(feng)冷效果較。分(fen)斷(duan)能(neng)力(li)(li)(li)的(de)(de)(de)(de)(de)(de)(de)選擇(ze)快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)外殼強(qiang)度(du)在(zai)很(hen)大(da)(da)程度(du)上(shang)(shang)確(que)定(ding)了對(dui)大(da)(da)故障電(dian)流的(de)(de)(de)(de)(de)(de)(de)分(fen)斷(duan)能(neng)力(li)(li)(li)。其(qi)次，快(kuai)(kuai)速(su)(su)(su)(su)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)(qi)內部的(de)(de)(de)(de)(de)(de)(de)金屬(shu)熔(rong)(rong)(rong)片形狀、填(tian)(tian)料吸(xi)附(fu)金屬(shu)蒸(zheng)汽能(neng)力(li)(li)(li)和熱量、熔(rong)(rong)(rong)斷(duan)體(ti)的(de)(de)(de)(de)(de)(de)(de)電(dian)動力(li)(li)(li)等都影(ying)響分(fen)斷(duan)能(neng)力(li)(li)(li)。

有(you)(you)關跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)停(ting)(ting)(ting)(ting)送(song)電(dian)(dian)(dian)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)步(bu)驟(zou)，高(gao)壓(ya)跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)三(san)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)順(shun)序(xu)，配電(dian)(dian)(dian)變壓(ya)器(qi)停(ting)(ting)(ting)(ting)送(song)電(dian)(dian)(dian)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)順(shun)序(xu)，操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)人員在(zai)拉(la)(la)、合跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)開(kai)始或(huo)終(zhong)了(le)時(shi)(shi)(shi)，不得有(you)(you)沖擊等。跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)停(ting)(ting)(ting)(ting)送(song)電(dian)(dian)(dian)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)步(bu)驟(zou)1、高(gao)壓(ya)跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)三(san)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)順(shun)序(xu)。停(ting)(ting)(ting)(ting)電(dian)(dian)(dian)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)時(shi)(shi)(shi)，應先(xian)拉(la)(la)中(zhong)(zhong)(zhong)間相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，后拉(la)(la)兩邊相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)。送(song)電(dian)(dian)(dian)時(shi)(shi)(shi)則(ze)先(xian)合兩邊相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，后合中(zhong)(zhong)(zhong)間相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)。停(ting)(ting)(ting)(ting)電(dian)(dian)(dian)時(shi)(shi)(shi)先(xian)拉(la)(la)中(zhong)(zhong)(zhong)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)原因主要(yao)是考慮到(dao)中(zhong)(zhong)(zhong)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)切(qie)斷(duan)(duan)(duan)時(shi)(shi)(shi)的(de)(de)電(dian)(dian)(dian)流要(yao)小(xiao)(xiao)于(yu)邊相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(電(dian)(dian)(dian)路(lu)一部(bu)分(fen)負(fu)荷轉由兩相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)承擔)，因而電(dian)(dian)(dian)弧(hu)(hu)小(xiao)(xiao)，對兩邊相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)無危險。操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)第二相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(邊相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang))跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)時(shi)(shi)(shi)，電(dian)(dian)(dian)流較(jiao)大，而此(ci)時(shi)(shi)(shi)中(zhong)(zhong)(zhong)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)已拉(la)(la)開(kai)，另(ling)兩個跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)距(ju)較(jiao)遠(yuan)，可(ke)(ke)防止(zhi)電(dian)(dian)(dian)弧(hu)(hu)拉(la)(la)長(chang)造成相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)間短(duan)路(lu)。遇到(dao)大風(feng)(feng)時(shi)(shi)(shi)，要(yao)按先(xian)拉(la)(la)中(zhong)(zhong)(zhong)間相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，再拉(la)(la)背風(feng)(feng)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，拉(la)(la)迎風(feng)(feng)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)順(shun)序(xu)進行(xing)(xing)停(ting)(ting)(ting)(ting)電(dian)(dian)(dian)。送(song)電(dian)(dian)(dian)時(shi)(shi)(shi)則(ze)先(xian)合迎風(feng)(feng)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，再合背鳳相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，合中(zhong)(zhong)(zhong)間相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，這樣可(ke)(ke)以(yi)防止(zhi)風(feng)(feng)吹電(dian)(dian)(dian)弧(hu)(hu)造成短(duan)路(lu)。2、配電(dian)(dian)(dian)變壓(ya)器(qi)停(ting)(ting)(ting)(ting)送(song)電(dian)(dian)(dian)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)順(shun)序(xu)：在(zai)一般情(qing)況下(xia)，停(ting)(ting)(ting)(ting)電(dian)(dian)(dian)時(shi)(shi)(shi)應先(xian)拉(la)(la)開(kai)負(fu)荷側的(de)(de)低壓(ya)開(kai)關，再拉(la)(la)開(kai)電(dian)(dian)(dian)源(yuan)側的(de)(de)高(gao)壓(ya)跌(die)落式(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)器(qi)。在(zai)多電(dian)(dian)(dian)源(yuan)的(de)(de)情(qing)況下(xia)，按上述順(shun)序(xu)停(ting)(ting)(ting)(ting)電(dian)(dian)(dian)，可(ke)(ke)以(yi)防止(zhi)變壓(ya)器(qi)反送(song)電(dian)(dian)(dian)，遇有(you)(you)故(gu)障時(shi)(shi)(shi)，保護可(ke)(ke)能(neng)(neng)拒動(dong)，延長(chang)故(gu)障切(qie)除時(shi)(shi)(shi)間，使事故(gu)擴大。從電(dian)(dian)(dian)源(yuan)側逐級進行(xing)(xing)送(song)電(dian)(dian)(dian)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)，可(ke)(ke)以(yi)減少沖擊起動(dong)電(dian)(dian)(dian)流(負(fu)荷)，減少電(dian)(dian)(dian)壓(ya)波動(dong)，保證設備安全運行(xing)(xing)。如遇有(you)(you)故(gu)障，可(ke)(ke)立(li)即(ji)跳閘(zha)或(huo)停(ting)(ting)(ting)(ting)止(zhi)操(cao)(cao)(cao)作(zuo)(zuo)(zuo)(zuo)。自復熔(rong)(rong)斷(duan)(duan)(duan)器(qi)只(zhi)能(neng)(neng)限制短(duan)路(lu)電(dian)(dian)(dian)流，不能(neng)(neng)真(zhen)正(zheng)分(fen)斷(duan)(duan)(duan)電(dian)(dian)(dian)路(lu)。其(qi)優點(dian)是不必更換熔(rong)(rong)體，能(neng)(neng)重復使用(yong)。

氯堿(jian)行業(ye)不常(chang)(chang)用(yong)該(gai)配置。2快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)選(xuan)(xuan)(xuan)用(yong)也(ye)稱電(dian)(dian)(dian)壓電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)法。線(xian)路(lu)變(bian)流(liu)(liu)(liu)(liu)(liu)變(bian)壓器(qi)(qi)(qi)的(de)(de)(de)(de)(de)線(xian)電(dian)(dian)(dian)壓應低(di)于快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)定(ding)(ding)電(dian)(dian)(dian)壓。經電(dian)(dian)(dian)力半導體(ti)(ti)器(qi)(qi)(qi)件與快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)串聯(lian)短(duan)(duan)路(lu)實驗(yan)驗(yan)證，以半導體(ti)(ti)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)乘以系(xi)數(shu)(shu)，做為(wei)所選(xuan)(xuan)(xuan)用(yong)的(de)(de)(de)(de)(de)快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)。因(yin)快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)是有(you)(you)效值，而(er)半導體(ti)(ti)器(qi)(qi)(qi)件的(de)(de)(de)(de)(de)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)是平(ping)均值，針(zhen)對上(shang)述(shu)(shu)一(yi)(yi)(yi)類(lei)配置方(fang)案，對一(yi)(yi)(yi)代產品RS0、RS3系(xi)列(lie)（我國快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)發展史可分為(wei)4個階段，一(yi)(yi)(yi)代是全(quan)國聯(lian)合設計(ji)的(de)(de)(de)(de)(de)RS0、RS3系(xi)列(lie)，參數(shu)(shu)為(wei)480A、750V以下，分斷(duan)(duan)(duan)能(neng)(neng)力為(wei)50kA，是一(yi)(yi)(yi)種體(ti)(ti)積較(jiao)大、價格(ge)低(di)廉、電(dian)(dian)(dian)壽命短(duan)(duan)的(de)(de)(de)(de)(de)初級產品，目前(qian)尚有(you)(you)相當裝(zhuang)機量）而(er)言(yan)，該(gai)系(xi)數(shu)(shu)可按整流(liu)(liu)(liu)(liu)(liu)管為(wei)、晶體(ti)(ti)管、快(kuai)(kuai)(kuai)速(su)(su)(su)晶體(ti)(ti)管為(wei)1來選(xuan)(xuan)(xuan)配，如ZP1000配1400A快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)。針(zhen)對上(shang)述(shu)(shu)第二類(lei)配置方(fang)案，則可依(yi)據閥電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)Iv以及(ji)變(bian)流(liu)(liu)(liu)(liu)(liu)裝(zhuang)置的(de)(de)(de)(de)(de)負載特性(xing)選(xuan)(xuan)(xuan)擇(ze)快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)，再按整流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)(qi)可能(neng)(neng)產生(sheng)的(de)(de)(de)(de)(de)大故(gu)障電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，來選(xuan)(xuan)(xuan)擇(ze)有(you)(you)足夠分斷(duan)(duan)(duan)能(neng)(neng)力的(de)(de)(de)(de)(de)快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)，如50kA或100kA，其(qi)中50kA為(wei)合格(ge)品，100kA為(wei)一(yi)(yi)(yi)級品。3快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)應用(yong)特性(xing)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)通過能(neng)(neng)力快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)是以有(you)(you)效值表示的(de)(de)(de)(de)(de)，一(yi)(yi)(yi)般正常(chang)(chang)通過電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)為(wei)標稱額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)30%～70%。快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)器(qi)(qi)(qi)使用(yong)時(shi)或其(qi)一(yi)(yi)(yi)端(duan)被(bei)半導體(ti)(ti)器(qi)(qi)(qi)件加(jia)熱而(er)另一(yi)(yi)(yi)端(duan)被(bei)水(shui)冷母排冷卻，或雙面都(dou)被(bei)水(shui)冷母排冷卻。只(zhi)能(neng)(neng)在極短(duan)(duan)時(shi)間內承受(shou)較(jiao)大的(de)(de)(de)(de)(de)過載電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，因(yin)此要求短(duan)(duan)路(lu)保(bao)護具有(you)(you)快(kuai)(kuai)(kuai)速(su)(su)(su)熔斷(duan)(duan)(duan)的(de)(de)(de)(de)(de)能(neng)(neng)力。北京貿易日本京山KYOSAN熔斷(duan)(duan)(duan)器(qi)(qi)(qi)現貨

熔斷(duan)器(qi)（fuse）是指當電流(liu)超(chao)過規定值時，以(yi)本身產生的熱量使熔體熔斷(duan)，斷(duan)開(kai)電路的一(yi)種電器(qi)。北京貿易日本京山KYOSAN熔斷(duan)器(qi)現貨

封閉式(shi)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)：封閉式(shi)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)分(fen)(fen)有(you)填(tian)料(liao)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)和(he)無填(tian)料(liao)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)兩種(zhong)，如圖(tu)3和(he)圖(tu)4所(suo)示(shi)。有(you)填(tian)料(liao)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)一般用方(fang)形(xing)瓷管，內裝(zhuang)石(shi)英(ying)砂及熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)，分(fen)(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)能(neng)力強(qiang)，用于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓等(deng)級500V以(yi)(yi)下、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)等(deng)級1KA以(yi)(yi)下的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中。無填(tian)料(liao)密閉式(shi)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)將熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)裝(zhuang)入密閉式(shi)圓筒(tong)中，分(fen)(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)能(neng)力稍(shao)小，用于(yu)500V以(yi)(yi)下，600A以(yi)(yi)下電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力網或(huo)配(pei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備中。快(kuai)速(su)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)：快(kuai)速(su)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)主要用于(yu)半(ban)導(dao)(dao)體(ti)(ti)整流(liu)元件或(huo)整流(liu)裝(zhuang)置的短路(lu)(lu)保護。由于(yu)半(ban)導(dao)(dao)體(ti)(ti)元件的過載能(neng)力很低(di)。只能(neng)在極短時間內承(cheng)受較大的過載電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，因(yin)此要求(qiu)短路(lu)(lu)保護具有(you)快(kuai)速(su)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)的能(neng)力。快(kuai)速(su)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的結構和(he)有(you)填(tian)料(liao)封閉式(shi)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)基(ji)本相同(tong)，但熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)材料(liao)和(he)形(xing)狀不(bu)同(tong)，它是(shi)以(yi)(yi)銀片沖制的有(you)V形(xing)深槽的變截面熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)。自(zi)復(fu)(fu)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)：采(cai)用金(jin)屬鈉作熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)，在常溫(wen)下具有(you)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)導(dao)(dao)率。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)發(fa)生短路(lu)(lu)故障時，短路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產生高溫(wen)使鈉迅速(su)汽(qi)化(hua)，汽(qi)態鈉呈現高阻態，從而限制了短路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)。當短路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)消失后，溫(wen)度下降，金(jin)屬鈉恢復(fu)(fu)原來的良好(hao)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)性能(neng)。自(zi)復(fu)(fu)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)只能(neng)限制短路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，不(bu)能(neng)真(zhen)正分(fen)(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。其優點(dian)是(shi)不(bu)必更換熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)，能(neng)重復(fu)(fu)使用。熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)結構特性編(bian)輯熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)額(e)定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)不(bu)等(deng)于(yu)熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)額(e)定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)額(e)定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)按(an)被保護設備的負荷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)選擇，熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)額(e)定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)應(ying)大于(yu)熔(rong)(rong)(rong)(rong)(rong)(rong)體(ti)(ti)額(e)定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，與主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)(qi)配(pei)合(he)確定(ding)。北(bei)京貿易日(ri)本京山KYOSAN熔(rong)(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)現貨

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