包括电(dian)(dian)(dian)网）都有(you)一(yi)(yi)(yi)定的(de)(de)(de)过(guo)载(zai)能力，当(dang)过(guo)载(zai)较轻时(shi)可以允许较长(zhang)时(shi)间(jian)运(yun)行，而超过(guo)某一(yi)(yi)(yi)过(guo)载(zai)倍数(shu)(shu)时(shi)，相应(ying)要求(qiu)熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)在(zai)(zai)一(yi)(yi)(yi)定时(shi)间(jian)内熔(rong)(rong)(rong)(rong)(rong)断(duan)。选择(ze)熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)保(bao)护(hu)(hu)(hu)过(guo)载(zai)和(he)(he)短(duan)路(lu)(lu)，必须了(le)解(jie)用电(dian)(dian)(dian)设备(bei)的(de)(de)(de)过(guo)载(zai)特(te)性(xing)，使(shi)这一(yi)(yi)(yi)特(te)性(xing)恰当(dang)地处在(zai)(zai)熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)秒-安特(te)性(xing)的(de)(de)(de)保(bao)护(hu)(hu)(hu)范围之(zhi)内。熔(rong)(rong)(rong)(rong)(rong)断(duan)电(dian)(dian)(dian)流Io的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)断(duan)时(shi)间(jian)在(zai)(zai)理论上是(shi)无(wu)限大的(de)(de)(de)，称为(wei)小(xiao)(xiao)融(rong)(rong)化(hua)(hua)(hua)电(dian)(dian)(dian)流或临(lin)界(jie)电(dian)(dian)(dian)流，即通(tong)过(guo)熔(rong)(rong)(rong)(rong)(rong)体(ti)(ti)(ti)(ti)的(de)(de)(de)电(dian)(dian)(dian)流小(xiao)(xiao)于临(lin)界(jie)值(zhi)(zhi)就不(bu)会熔(rong)(rong)(rong)(rong)(rong)断(duan)。所以选择(ze)熔(rong)(rong)(rong)(rong)(rong)体(ti)(ti)(ti)(ti)的(de)(de)(de)额定电(dian)(dian)(dian)流Ie应(ying)小(xiao)(xiao)于Io；通(tong)常取Io与Ie的(de)(de)(de)比值(zhi)(zhi)为(wei)～，称作(zuo)(zuo)熔(rong)(rong)(rong)(rong)(rong)化(hua)(hua)(hua)系数(shu)(shu)。该系数(shu)(shu)反映熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)在(zai)(zai)过(guo)载(zai)时(shi)的(de)(de)(de)不(bu)同保(bao)护(hu)(hu)(hu)特(te)性(xing)，如要使(shi)熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)能保(bao)护(hu)(hu)(hu)小(xiao)(xiao)过(guo)载(zai)电(dian)(dian)(dian)流，融(rong)(rong)化(hua)(hua)(hua)系数(shu)(shu)就应(ying)该低(di)些；为(wei)了(le)避免(mian)电(dian)(dian)(dian)动机起(qi)(qi)动时(shi)的(de)(de)(de)短(duan)时(shi)过(guo)电(dian)(dian)(dian)流使(shi)熔(rong)(rong)(rong)(rong)(rong)体(ti)(ti)(ti)(ti)熔(rong)(rong)(rong)(rong)(rong)化(hua)(hua)(hua)，融(rong)(rong)化(hua)(hua)(hua)系数(shu)(shu)就应(ying)高些。快(kuai)速熔(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)电(dian)(dian)(dian)流通(tong)过(guo)能力满足系统短(duan)路(lu)(lu)电(dian)(dian)(dian)流的(de)(de)(de)要求(qiu)后，发生短(duan)路(lu)(lu)故障时(shi)可以隔离故障电(dian)(dian)(dian)流，但能否保(bao)护(hu)(hu)(hu)所串(chuan)联的(de)(de)(de)半(ban)(ban)导(dao)体(ti)(ti)(ti)(ti)器(qi)(qi)(qi)件则必须分(fen)(fen)析二(er)者的(de)(de)(de)I2t值(zhi)(zhi)。只有(you)当(dang)快(kuai)速熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)的(de)(de)(de)I2t值(zhi)(zhi)小(xiao)(xiao)于半(ban)(ban)导(dao)体(ti)(ti)(ti)(ti)器(qi)(qi)(qi)件I2t值(zhi)(zhi)时(shi)，才能对半(ban)(ban)导(dao)体(ti)(ti)(ti)(ti)器(qi)(qi)(qi)件起(qi)(qi)到保(bao)护(hu)(hu)(hu)作(zuo)(zuo)用。短(duan)路(lu)(lu)故障时(shi)I2t值(zhi)(zhi)分(fen)(fen)为(wei)两个阶段，即弧(hu)前(qian)(qian)I2t和(he)(he)熔(rong)(rong)(rong)(rong)(rong)断(duan)I2t。熔(rong)(rong)(rong)(rong)(rong)体(ti)(ti)(ti)(ti)金(jin)属从固态转为(wei)液态的(de)(de)(de)时(shi)间(jian)是(shi)弧(hu)前(qian)(qian)时(shi)间(jian)，大约～，可以认(ren)为(wei)是(shi)绝热过(guo)程，此时(shi)间(jian)段快(kuai)速熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)产生的(de)(de)(de)电(dian)(dian)(dian)流时(shi)间(jian)积分(fen)(fen)可以认(ren)为(wei)是(shi)一(yi)(yi)(yi)定值(zhi)(zhi)，由设计来确定。弧(hu)前(qian)(qian)I2t值(zhi)(zhi)对于不(bu)同的(de)(de)(de)材料其值(zhi)(zhi)也不(bu)同。作(zuo)(zuo)为(wei)短(duan)路(lu)(lu)和(he)(he)过(guo)电(dian)(dian)(dian)流的(de)(de)(de)保(bao)护(hu)(hu)(hu)器(qi)(qi)(qi)，是(shi)应(ying)用普(pu)遍的(de)(de)(de)保(bao)护(hu)(hu)(hu)器(qi)(qi)(qi)件之(zhi)一(yi)(yi)(yi)。北京贸易日本(ben)京山KYOSAN熔(rong)(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)现货

一(yi)般用(yong)(yong)(yong)(yong)途(tu)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)分断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)范(fan)围指(zhi)从过(guo)(guo)载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)大于(yu)(yu)(yu)额定电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)～2倍起(qi)，到大分断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)范(fan)围。这种熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)主(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)于(yu)(yu)(yu)保护电(dian)(dian)(dian)(dian)(dian)(dian)(dian)力变压(ya)器(qi)(qi)(qi)(qi)(qi)和一(yi)般电(dian)(dian)(dian)(dian)(dian)(dian)(dian)气设备(bei)。后(hou)备(bei)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)分断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)范(fan)围指(zhi)从过(guo)(guo)载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)大于(yu)(yu)(yu)额定电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)4～7倍起(qi)分断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)范(fan)围。这种熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)常与接触(chu)(chu)器(qi)(qi)(qi)(qi)(qi)串联使用(yong)(yong)(yong)(yong)，在(zai)过(guo)(guo)载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)小(xiao)于(yu)(yu)(yu)额定电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)4～7倍的(de)(de)(de)范(fan)围时，由接触(chu)(chu)器(qi)(qi)(qi)(qi)(qi)来实(shi)现分断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)保护。主(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)于(yu)(yu)(yu)保护电(dian)(dian)(dian)(dian)(dian)(dian)(dian)动机。随(sui)着工业发展的(de)(de)(de)需(xu)要(yao)，还(hai)制造(zao)出适于(yu)(yu)(yu)各种不同要(yao)求的(de)(de)(de)特殊(shu)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)，如电(dian)(dian)(dian)(dian)(dian)(dian)(dian)子熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)、热熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)和自(zi)复熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)等(deng)(deng)。熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)级间配合编辑为防止发生越级熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)、扩大事(shi)故范(fan)围，上、下级（即供电(dian)(dian)(dian)(dian)(dian)(dian)(dian)干(gan)、支线(xian)）线(xian)路的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)间应(ying)有(you)良好配合。选用(yong)(yong)(yong)(yong)时，应(ying)使上级（供电(dian)(dian)(dian)(dian)(dian)(dian)(dian)干(gan)线(xian)）熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)体额定电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)比下级（供电(dian)(dian)(dian)(dian)(dian)(dian)(dian)支线(xian)）的(de)(de)(de)大1～2个级差。常用(yong)(yong)(yong)(yong)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)有(you)管式熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)R1系(xi)列(lie)、螺旋式熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)RLl系(xi)列(lie)、填料封闭式熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)RT0系(xi)列(lie)及快速熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)RSO、RS3系(xi)列(lie)等(deng)(deng)。熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)使用(yong)(yong)(yong)(yong)维(wei)护编辑低(di)压(ya)配电(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)统中熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)是(shi)(shi)起(qi)安全保护作(zuo)用(yong)(yong)(yong)(yong)的(de)(de)(de)一(yi)种电(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)(qi)，熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)应(ying)用(yong)(yong)(yong)(yong)于(yu)(yu)(yu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)网(wang)保护和用(yong)(yong)(yong)(yong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)设备(bei)保护，当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)网(wang)或用(yong)(yong)(yong)(yong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)设备(bei)发生短路故障或过(guo)(guo)载时，可自(zi)动切断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，避免电(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)(qi)设备(bei)损坏，防止事(shi)故蔓延。熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)由绝缘(yuan)底座（或支持件）、触(chu)(chu)头、熔(rong)(rong)(rong)(rong)(rong)体等(deng)(deng)组成，熔(rong)(rong)(rong)(rong)(rong)体是(shi)(shi)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)主(zhu)(zhu)要(yao)工作(zuo)部分。北(bei)京(jing)贸易日本(ben)京(jing)山KYOSAN熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)现货(huo)虽然该电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)受外界(jie)环(huan)境的(de)(de)(de)影响(xiang)，但在(zai)实(shi)际应(ying)用(yong)(yong)(yong)(yong)中可以不加考虑。

用(yong)(yong)户在(zai)使用(yong)(yong)前应向制(zhi)(zhi)造(zao)厂垂询。风(feng)(feng)(feng)冷也是(shi)一(yi)(yi)种减少(shao)温(wen)升(sheng)(sheng)的(de)(de)(de)(de)(de)(de)有(you)效方法，根据风(feng)(feng)(feng)速(su)(su)(su)通(tong)过能(neng)力(li)曲线来确定(ding)风(feng)(feng)(feng)速(su)(su)(su)对快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)温(wen)升(sheng)(sheng)的(de)(de)(de)(de)(de)(de)影响(xiang)，风(feng)(feng)(feng)速(su)(su)(su)约5m/s时一(yi)(yi)般可(ke)以(yi)(yi)提(ti)(ti)高(gao)25%的(de)(de)(de)(de)(de)(de)通(tong)流能(neng)力(li)，风(feng)(feng)(feng)速(su)(su)(su)若再增加(jia)将不会有(you)明显的(de)(de)(de)(de)(de)(de)作用(yong)(yong)。根据制(zhi)(zhi)造(zao)厂提(ti)(ti)供的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)电(dian)(dian)(dian)(dian)压(ya)降(jiang)(jiang)曲线以(yi)(yi)及额定(ding)电(dian)(dian)(dian)(dian)流下的(de)(de)(de)(de)(de)(de)功耗(hao)，测量(liang)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)两(liang)极端(duan)(duan)子(zi)(zi)间的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)压(ya)降(jiang)(jiang)可(ke)以(yi)(yi)快(kuai)速(su)(su)(su)计算出该支路的(de)(de)(de)(de)(de)(de)实际电(dian)(dian)(dian)(dian)流。另外，在(zai)同样(yang)的(de)(de)(de)(de)(de)(de)通(tong)流情(qing)况下，温(wen)升(sheng)(sheng)还与快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)是(shi)否采用(yong)(yong)单一(yi)(yi)或双(shuang)(shuang)并(bing)有(you)关(guan)。先(xian)进工(gong)业国家(jia)制(zhi)(zhi)造(zao)的(de)(de)(de)(de)(de)(de)大(da)功率整流装置中多(duo)采用(yong)(yong)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)双(shuang)(shuang)并(bing)与半导(dao)体(ti)器(qi)(qi)(qi)件串联(lian)，如700A×2、1400A×2、2500A×2。双(shuang)(shuang)并(bing)结(jie)(jie)构(gou)(gou)的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)端(duan)(duan)子(zi)(zi)可(ke)以(yi)(yi)尽量(liang)减薄，以(yi)(yi)减小电(dian)(dian)(dian)(dian)阻。有(you)一(yi)(yi)类双(shuang)(shuang)并(bing)连(lian)接(jie)的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)靠螺(luo)栓(shuan)和连(lian)板连(lian)接(jie)，另一(yi)(yi)类是(shi)连(lian)板（端(duan)(duan)子(zi)(zi)）与2个熔(rong)(rong)(rong)(rong)体(ti)（端(duan)(duan)子(zi)(zi)）焊为一(yi)(yi)体(ti)的(de)(de)(de)(de)(de)(de)结(jie)(jie)构(gou)(gou)，此类结(jie)(jie)构(gou)(gou)比较(jiao)先(xian)进。电(dian)(dian)(dian)(dian)压(ya)较(jiao)高(gao)的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)其内(nei)阻较(jiao)大(da)，尤(you)其是(shi)800V以(yi)(yi)上(shang)产品，由于外壳(qiao)(qiao)瓷套有(you)一(yi)(yi)定(ding)的(de)(de)(de)(de)(de)(de)长度(du)，表面(mian)积较(jiao)大(da)，而熔(rong)(rong)(rong)(rong)体(ti)产生的(de)(de)(de)(de)(de)(de)热量(liang)经由填料(liao)(liao)、外壳(qiao)(qiao)传导(dao)散热，故电(dian)(dian)(dian)(dian)压(ya)高(gao)的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)风(feng)(feng)(feng)冷效果较(jiao)。分断(duan)能(neng)力(li)的(de)(de)(de)(de)(de)(de)选择快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)外壳(qiao)(qiao)强度(du)在(zai)很大(da)程度(du)上(shang)确定(ding)了对大(da)故障(zhang)电(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)(de)(de)分断(duan)能(neng)力(li)。其次(ci)，快(kuai)速(su)(su)(su)熔(rong)(rong)(rong)(rong)断(duan)器(qi)(qi)(qi)内(nei)部的(de)(de)(de)(de)(de)(de)金属熔(rong)(rong)(rong)(rong)片形状、填料(liao)(liao)吸附(fu)金属蒸汽能(neng)力(li)和热量(liang)、熔(rong)(rong)(rong)(rong)断(duan)体(ti)的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)动力(li)等都(dou)影响(xiang)分断(duan)能(neng)力(li)。

有(you)(you)(you)关(guan)跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)停(ting)送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)操(cao)作步骤(zhou)，高(gao)压(ya)(ya)跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)三(san)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的操(cao)作顺(shun)(shun)序，配电(dian)(dian)(dian)(dian)(dian)变(bian)(bian)压(ya)(ya)器(qi)(qi)停(ting)送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)操(cao)作顺(shun)(shun)序，操(cao)作人员在拉(la)(la)、合(he)(he)跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)开(kai)始或终了(le)时(shi)(shi)(shi)，不(bu)得有(you)(you)(you)冲(chong)击等。跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)停(ting)送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)操(cao)作步骤(zhou)1、高(gao)压(ya)(ya)跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)三(san)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的操(cao)作顺(shun)(shun)序。停(ting)电(dian)(dian)(dian)(dian)(dian)操(cao)作时(shi)(shi)(shi)，应先(xian)拉(la)(la)中(zhong)间相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，后拉(la)(la)两(liang)边相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)。送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)时(shi)(shi)(shi)则(ze)先(xian)合(he)(he)两(liang)边相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，后合(he)(he)中(zhong)间相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)。停(ting)电(dian)(dian)(dian)(dian)(dian)时(shi)(shi)(shi)先(xian)拉(la)(la)中(zhong)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的原因主要(yao)是考虑到中(zhong)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)切(qie)断(duan)(duan)(duan)(duan)(duan)时(shi)(shi)(shi)的电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)要(yao)小(xiao)于边相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)一部分(fen)负荷转由(you)两(liang)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)承(cheng)担(dan))，因而电(dian)(dian)(dian)(dian)(dian)弧(hu)小(xiao)，对两(liang)边相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)无危险。操(cao)作第二相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(边相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang))跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)时(shi)(shi)(shi)，电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)较大(da)，而此时(shi)(shi)(shi)中(zhong)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)已拉(la)(la)开(kai)，另两(liang)个(ge)跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)距(ju)较远，可(ke)(ke)防(fang)止电(dian)(dian)(dian)(dian)(dian)弧(hu)拉(la)(la)长造成(cheng)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)间短(duan)路(lu)(lu)。遇到大(da)风时(shi)(shi)(shi)，要(yao)按(an)先(xian)拉(la)(la)中(zhong)间相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，再拉(la)(la)背风相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，拉(la)(la)迎风相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的顺(shun)(shun)序进(jin)行停(ting)电(dian)(dian)(dian)(dian)(dian)。送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)时(shi)(shi)(shi)则(ze)先(xian)合(he)(he)迎风相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，再合(he)(he)背凤(feng)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，合(he)(he)中(zhong)间相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，这样可(ke)(ke)以(yi)(yi)防(fang)止风吹(chui)电(dian)(dian)(dian)(dian)(dian)弧(hu)造成(cheng)短(duan)路(lu)(lu)。2、配电(dian)(dian)(dian)(dian)(dian)变(bian)(bian)压(ya)(ya)器(qi)(qi)停(ting)送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)操(cao)作顺(shun)(shun)序：在一般情(qing)况下，停(ting)电(dian)(dian)(dian)(dian)(dian)时(shi)(shi)(shi)应先(xian)拉(la)(la)开(kai)负荷侧(ce)的低压(ya)(ya)开(kai)关(guan)，再拉(la)(la)开(kai)电(dian)(dian)(dian)(dian)(dian)源(yuan)侧(ce)的高(gao)压(ya)(ya)跌(die)落式(shi)熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)。在多电(dian)(dian)(dian)(dian)(dian)源(yuan)的情(qing)况下，按(an)上(shang)述顺(shun)(shun)序停(ting)电(dian)(dian)(dian)(dian)(dian)，可(ke)(ke)以(yi)(yi)防(fang)止变(bian)(bian)压(ya)(ya)器(qi)(qi)反送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)，遇有(you)(you)(you)故(gu)(gu)障时(shi)(shi)(shi)，保(bao)护可(ke)(ke)能(neng)拒动，延(yan)长故(gu)(gu)障切(qie)除时(shi)(shi)(shi)间，使事故(gu)(gu)扩(kuo)大(da)。从电(dian)(dian)(dian)(dian)(dian)源(yuan)侧(ce)逐级进(jin)行送(song)(song)(song)电(dian)(dian)(dian)(dian)(dian)操(cao)作，可(ke)(ke)以(yi)(yi)减(jian)少冲(chong)击起动电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(负荷)，减(jian)少电(dian)(dian)(dian)(dian)(dian)压(ya)(ya)波动，保(bao)证设备(bei)安全运行。如(ru)遇有(you)(you)(you)故(gu)(gu)障，可(ke)(ke)立即跳闸(zha)或停(ting)止操(cao)作。自复熔(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)只能(neng)限制短(duan)路(lu)(lu)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，不(bu)能(neng)真正分(fen)断(duan)(duan)(duan)(duan)(duan)电(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。其优点(dian)是不(bu)必更(geng)换熔(rong)(rong)(rong)体(ti)，能(neng)重复使用。

氯碱(jian)行业(ye)不常(chang)用(yong)该(gai)配置。2快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)选用(yong)也称电(dian)(dian)压电(dian)(dian)流(liu)(liu)(liu)(liu)法。线(xian)路变流(liu)(liu)(liu)(liu)变压器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)线(xian)电(dian)(dian)压应(ying)低于快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)额定(ding)电(dian)(dian)压。经电(dian)(dian)力(li)(li)半导(dao)(dao)体器(qi)(qi)(qi)件(jian)与快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)串(chuan)联短路实(shi)验验证，以半导(dao)(dao)体额定(ding)电(dian)(dian)流(liu)(liu)(liu)(liu)乘(cheng)以系数，做为(wei)所选用(yong)的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)额定(ding)电(dian)(dian)流(liu)(liu)(liu)(liu)。因快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)额定(ding)电(dian)(dian)流(liu)(liu)(liu)(liu)是(shi)有(you)效值，而(er)半导(dao)(dao)体器(qi)(qi)(qi)件(jian)的(de)(de)(de)(de)(de)(de)额定(ding)电(dian)(dian)流(liu)(liu)(liu)(liu)是(shi)平(ping)均值，针对(dui)上(shang)述一类配置方案，对(dui)一代产品(pin)RS0、RS3系列(lie)（我国(guo)快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)发(fa)展史(shi)可(ke)分(fen)为(wei)4个阶段，一代是(shi)全国(guo)联合(he)设计的(de)(de)(de)(de)(de)(de)RS0、RS3系列(lie)，参数为(wei)480A、750V以下，分(fen)断(duan)(duan)(duan)(duan)(duan)能(neng)力(li)(li)为(wei)50kA，是(shi)一种体积较(jiao)大(da)、价格(ge)低廉、电(dian)(dian)寿命短的(de)(de)(de)(de)(de)(de)初(chu)级产品(pin)，目前(qian)尚有(you)相当装(zhuang)机量）而(er)言(yan)，该(gai)系数可(ke)按整(zheng)流(liu)(liu)(liu)(liu)管为(wei)、晶体管、快(kuai)速(su)(su)晶体管为(wei)1来选配，如(ru)ZP1000配1400A快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)。针对(dui)上(shang)述第(di)二类配置方案，则可(ke)依据阀电(dian)(dian)流(liu)(liu)(liu)(liu)Iv以及变流(liu)(liu)(liu)(liu)装(zhuang)置的(de)(de)(de)(de)(de)(de)负载(zai)特性选择快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)，再(zai)按整(zheng)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)可(ke)能(neng)产生的(de)(de)(de)(de)(de)(de)大(da)故障电(dian)(dian)流(liu)(liu)(liu)(liu)，来选择有(you)足够(gou)分(fen)断(duan)(duan)(duan)(duan)(duan)能(neng)力(li)(li)的(de)(de)(de)(de)(de)(de)快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)，如(ru)50kA或(huo)100kA，其(qi)中(zhong)50kA为(wei)合(he)格(ge)品(pin)，100kA为(wei)一级品(pin)。3快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)应(ying)用(yong)特性电(dian)(dian)流(liu)(liu)(liu)(liu)通过能(neng)力(li)(li)快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)额定(ding)电(dian)(dian)流(liu)(liu)(liu)(liu)是(shi)以有(you)效值表示的(de)(de)(de)(de)(de)(de)，一般正常(chang)通过电(dian)(dian)流(liu)(liu)(liu)(liu)为(wei)标称额定(ding)电(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)30%～70%。快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)使用(yong)时(shi)或(huo)其(qi)一端(duan)被(bei)半导(dao)(dao)体器(qi)(qi)(qi)件(jian)加热而(er)另(ling)一端(duan)被(bei)水冷(leng)(leng)母(mu)排冷(leng)(leng)却，或(huo)双面都(dou)被(bei)水冷(leng)(leng)母(mu)排冷(leng)(leng)却。只能(neng)在极短时(shi)间内承受较(jiao)大(da)的(de)(de)(de)(de)(de)(de)过载(zai)电(dian)(dian)流(liu)(liu)(liu)(liu)，因此要求(qiu)短路保护具有(you)快(kuai)速(su)(su)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)的(de)(de)(de)(de)(de)(de)能(neng)力(li)(li)。北京(jing)贸易日本(ben)京(jing)山KYOSAN熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)现(xian)货

熔断(duan)(duan)器(qi)（fuse）是指当电流(liu)超过规定(ding)值(zhi)时(shi)，以(yi)本身产生(sheng)的热量使熔体熔断(duan)(duan)，断(duan)(duan)开(kai)电路的一(yi)种电器(qi)。北(bei)京贸易日本京山KYOSAN熔断(duan)(duan)器(qi)现货

封闭式(shi)熔(rong)(rong)断(duan)(duan)器：封闭式(shi)熔(rong)(rong)断(duan)(duan)器分有(you)填(tian)料(liao)(liao)熔(rong)(rong)断(duan)(duan)器和(he)无(wu)填(tian)料(liao)(liao)熔(rong)(rong)断(duan)(duan)器两(liang)种，如图(tu)3和(he)图(tu)4所示。有(you)填(tian)料(liao)(liao)熔(rong)(rong)断(duan)(duan)器一般用(yong)方形(xing)(xing)瓷管，内装石英砂及熔(rong)(rong)体(ti)(ti)(ti)，分断(duan)(duan)能(neng)(neng)力(li)(li)强，用(yong)于电(dian)(dian)(dian)(dian)压等级500V以(yi)下(xia)、电(dian)(dian)(dian)(dian)流(liu)等级1KA以(yi)下(xia)的(de)电(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中。无(wu)填(tian)料(liao)(liao)密闭式(shi)熔(rong)(rong)断(duan)(duan)器将熔(rong)(rong)体(ti)(ti)(ti)装入(ru)密闭式(shi)圆(yuan)筒中，分断(duan)(duan)能(neng)(neng)力(li)(li)稍(shao)小，用(yong)于500V以(yi)下(xia)，600A以(yi)下(xia)电(dian)(dian)(dian)(dian)力(li)(li)网或配(pei)电(dian)(dian)(dian)(dian)设备中。快(kuai)速熔(rong)(rong)断(duan)(duan)器：快(kuai)速熔(rong)(rong)断(duan)(duan)器主要(yao)用(yong)于半导体(ti)(ti)(ti)整(zheng)流(liu)元(yuan)件或整(zheng)流(liu)装置的(de)短(duan)(duan)路(lu)(lu)(lu)保护。由(you)于半导体(ti)(ti)(ti)元(yuan)件的(de)过载能(neng)(neng)力(li)(li)很(hen)低(di)。只能(neng)(neng)在(zai)(zai)极短(duan)(duan)时间内承受(shou)较大的(de)过载电(dian)(dian)(dian)(dian)流(liu)，因此(ci)要(yao)求短(duan)(duan)路(lu)(lu)(lu)保护具(ju)有(you)快(kuai)速熔(rong)(rong)断(duan)(duan)的(de)能(neng)(neng)力(li)(li)。快(kuai)速熔(rong)(rong)断(duan)(duan)器的(de)结构和(he)有(you)填(tian)料(liao)(liao)封闭式(shi)熔(rong)(rong)断(duan)(duan)器基本相同，但熔(rong)(rong)体(ti)(ti)(ti)材料(liao)(liao)和(he)形(xing)(xing)状不同，它是以(yi)银片冲(chong)制的(de)有(you)V形(xing)(xing)深槽(cao)的(de)变(bian)截面熔(rong)(rong)体(ti)(ti)(ti)。自(zi)复(fu)熔(rong)(rong)断(duan)(duan)器：采用(yong)金(jin)属钠(na)作熔(rong)(rong)体(ti)(ti)(ti)，在(zai)(zai)常温(wen)下(xia)具(ju)有(you)高电(dian)(dian)(dian)(dian)导率。当(dang)电(dian)(dian)(dian)(dian)路(lu)(lu)(lu)发生(sheng)短(duan)(duan)路(lu)(lu)(lu)故障(zhang)时，短(duan)(duan)路(lu)(lu)(lu)电(dian)(dian)(dian)(dian)流(liu)产(chan)生(sheng)高温(wen)使钠(na)迅(xun)速汽(qi)化(hua)，汽(qi)态(tai)钠(na)呈(cheng)现高阻(zu)态(tai)，从(cong)而限(xian)制了短(duan)(duan)路(lu)(lu)(lu)电(dian)(dian)(dian)(dian)流(liu)。当(dang)短(duan)(duan)路(lu)(lu)(lu)电(dian)(dian)(dian)(dian)流(liu)消失(shi)后，温(wen)度下(xia)降，金(jin)属钠(na)恢复(fu)原来的(de)良(liang)好导电(dian)(dian)(dian)(dian)性能(neng)(neng)。自(zi)复(fu)熔(rong)(rong)断(duan)(duan)器只能(neng)(neng)限(xian)制短(duan)(duan)路(lu)(lu)(lu)电(dian)(dian)(dian)(dian)流(liu)，不能(neng)(neng)真(zhen)正分断(duan)(duan)电(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。其优点是不必(bi)更换(huan)熔(rong)(rong)体(ti)(ti)(ti)，能(neng)(neng)重复(fu)使用(yong)。熔(rong)(rong)断(duan)(duan)器结构特性编辑(ji)熔(rong)(rong)体(ti)(ti)(ti)额(e)(e)定(ding)(ding)电(dian)(dian)(dian)(dian)流(liu)不等于熔(rong)(rong)断(duan)(duan)器额(e)(e)定(ding)(ding)电(dian)(dian)(dian)(dian)流(liu)，熔(rong)(rong)体(ti)(ti)(ti)额(e)(e)定(ding)(ding)电(dian)(dian)(dian)(dian)流(liu)按(an)被保护设备的(de)负荷电(dian)(dian)(dian)(dian)流(liu)选(xuan)择，熔(rong)(rong)断(duan)(duan)器额(e)(e)定(ding)(ding)电(dian)(dian)(dian)(dian)流(liu)应大于熔(rong)(rong)体(ti)(ti)(ti)额(e)(e)定(ding)(ding)电(dian)(dian)(dian)(dian)流(liu)，与主电(dian)(dian)(dian)(dian)器配(pei)合确(que)定(ding)(ding)。北京贸易日(ri)本京山(shan)KYOSAN熔(rong)(rong)断(duan)(duan)器现货

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