根據以下(xia)(xia)資料，回(hui)答下(xia)(xia)題(ti)某220kV變電(dian)(dian)站位于(yu)Ⅲ級污穢區，海(hai)拔高(gao)度600m，220kV2回(hui)電(dian)(dian)源(yuan)進(jin)線(xian)，2回(hui)負荷出線(xian)，每回(hui)出線(xian)各(ge)帶負荷120MVA，采(cai)用(yong)單母(mu)線(xian)分段(duan)接線(xian)，2臺電(dian)(dian)壓等級為(wei)220/110/10kV，容量為(wei)240MVA主變，負載率為(wei)65％，母(mu)線(xian)采(cai)用(yong)管(guan)形鋁鎂合金，戶外布(bu)置。220kV電(dian)(dian)源(yuan)進(jin)線(xian)配置了(le)變比為(wei)2000/5A電(dian)(dian)流(liu)(liu)互感器(qi)(qi)，其主保護(hu)動作(zuo)時(shi)間(jian)為(wei)，后備保護(hu)動作(zuo)時(shi)間(jian)為(wei)2s，斷路器(qi)(qi)全(quan)分閘時(shi)間(jian)為(wei)40ms，比較(jiao)大運(yun)行方(fang)式時(shi)，220kV母(mu)線(xian)三相短路電(dian)(dian)流(liu)(liu)為(wei)30kA，站用(yong)變壓器(qi)(qi)容量為(wei)2臺400kVA。請回(hui)答下(xia)(xia)列問題(ti)。304、請計算該(gai)站用(yong)于(yu)站用(yong)變壓器(qi)(qi)保護(hu)的(de)高(gao)壓熔(rong)(rong)斷器(qi)(qi)熔(rong)(rong)體(ti)(ti)的(de)額(e)(e)定(ding)電(dian)(dian)流(liu)(liu)，判(pan)斷下(xia)(xia)列哪(na)項是(shi)正(zheng)確(que)的(de)，并(bing)說明理由。(系數取)（）A．熔(rong)(rong)管(guan)25A，熔(rong)(rong)體(ti)(ti)30AB．熔(rong)(rong)管(guan)50A，熔(rong)(rong)體(ti)(ti)30AC．熔(rong)(rong)管(guan)30A，熔(rong)(rong)體(ti)(ti)32AD．熔(rong)(rong)管(guan)50A，熔(rong)(rong)體(ti)(ti)32A解答：根據《電(dian)(dian)力工程電(dian)(dian)氣設計手冊》電(dian)(dian)氣一次部分246頁(ye)，公式6-6及232頁(ye)表6-3InR=K*Ibgm=**（400/√3*10）=熔(rong)(rong)體(ti)(ti)額(e)(e)定(ding)電(dian)(dian)流(liu)(liu)選(xuan)32A熔(rong)(rong)管(guan)額(e)(e)定(ding)電(dian)(dian)流(liu)(liu)要大于(yu)熔(rong)(rong)體(ti)(ti)額(e)(e)定(ding)電(dian)(dian)流(liu)(liu)。熔(rong)(rong)斷器(qi)(qi)的(de)動作(zuo)是(shi)靠(kao)熔(rong)(rong)體(ti)(ti)的(de)熔(rong)(rong)斷來實現(xian)的(de)，熔(rong)(rong)斷器(qi)(qi)有個非(fei)常明顯的(de)特(te)性(xing)，就是(shi)安秒特(te)性(xing)。遼寧熔(rong)(rong)斷器(qi)(qi)的(de)保護(hu)

二、熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)選(xuan)用(yong)(yong)(yong)1.熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)類(lei)型的(de)(de)(de)(de)(de)選(xuan)用(yong)(yong)(yong)根據使(shi)用(yong)(yong)(yong)環境、負載(zai)(zai)性質和短路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)大(da)小選(xuan)用(yong)(yong)(yong)適當類(lei)型的(de)(de)(de)(de)(de)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)。2.熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)壓和額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)選(xuan)用(yong)(yong)(yong)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)壓必(bi)須等(deng)于(yu)(yu)或(huo)(huo)大(da)于(yu)(yu)線路(lu)(lu)(lu)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)壓。熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)必(bi)須等(deng)于(yu)(yu)或(huo)(huo)大(da)于(yu)(yu)所裝(zhuang)(zhuang)(zhuang)熔(rong)(rong)(rong)體(ti)(ti)(ti)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。3.熔(rong)(rong)(rong)體(ti)(ti)(ti)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)(de)選(xuan)用(yong)(yong)(yong)（1）對照明和電(dian)(dian)(dian)(dian)(dian)熱等(deng)的(de)(de)(de)(de)(de)短路(lu)(lu)(lu)保護，熔(rong)(rong)(rong)體(ti)(ti)(ti)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)應等(deng)于(yu)(yu)或(huo)(huo)稍大(da)于(yu)(yu)負載(zai)(zai)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。（2）對一臺(tai)不經常啟(qi)(qi)動(dong)(dong)且啟(qi)(qi)動(dong)(dong)時(shi)間不長(chang)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)(de)(de)短路(lu)(lu)(lu)保護，應有：IRN≥(～)IN（3)對多臺(tai)電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)(de)(de)短路(lu)(lu)(lu)保護，應有：IRN≥(～)INmax+∑IN例(li)1－1某(mou)機(ji)(ji)床電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)(de)(de)型號為(wei)(wei)Y112M－4，額(e)(e)(e)定(ding)(ding)(ding)功(gong)率為(wei)(wei)4kW，額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)壓為(wei)(wei)380V，額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)為(wei)(wei)，該電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)正常工作(zuo)時(shi)不需要(yao)頻繁啟(qi)(qi)動(dong)(dong)。若用(yong)(yong)(yong)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)為(wei)(wei)該電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)提供(gong)短路(lu)(lu)(lu)保護，試確(que)定(ding)(ding)(ding)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)型號規格(ge)。解：（1）選(xuan)擇(ze)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)類(lei)型：用(yong)(yong)(yong)RL1系列螺旋式熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)。（2）選(xuan)擇(ze)熔(rong)(rong)(rong)體(ti)(ti)(ti)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)：IRN=(～)×≈～22A查表(biao)1－5得熔(rong)(rong)(rong)體(ti)(ti)(ti)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)為(wei)(wei)：IRN=20A（3）選(xuan)擇(ze)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)和電(dian)(dian)(dian)(dian)(dian)壓：查表(biao)1－5，可選(xuan)取RL1－60/20型熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)，其額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)為(wei)(wei)60A，額(e)(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)(dian)壓為(wei)(wei)500V。三(san)、熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)安(an)裝(zhuang)(zhuang)(zhuang)與使(shi)用(yong)(yong)(yong)1.用(yong)(yong)(yong)于(yu)(yu)安(an)裝(zhuang)(zhuang)(zhuang)使(shi)用(yong)(yong)(yong)的(de)(de)(de)(de)(de)熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)應完整無損(sun)。2.熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)安(an)裝(zhuang)(zhuang)(zhuang)時(shi)應保證熔(rong)(rong)(rong)體(ti)(ti)(ti)與夾頭、夾頭與夾座(zuo)接(jie)觸良好(hao)。3.熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)內要(yao)安(an)裝(zhuang)(zhuang)(zhuang)合格(ge)的(de)(de)(de)(de)(de)熔(rong)(rong)(rong)體(ti)(ti)(ti)。4.更(geng)換(huan)熔(rong)(rong)(rong)體(ti)(ti)(ti)或(huo)(huo)熔(rong)(rong)(rong)管時(shi)。遼寧熔(rong)(rong)(rong)斷(duan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)保護更(geng)換(huan)新熔(rong)(rong)(rong)體(ti)(ti)(ti)時(shi)，要(yao)檢查熔(rong)(rong)(rong)斷(duan)管內部(bu)燒傷情況，如(ru)有嚴重燒傷，應同時(shi)更(geng)換(huan)熔(rong)(rong)(rong)管。

操(cao)作(zuo)前(qian)應(ying)(ying)(ying)考(kao)慮合環(huan)點(dian)兩側的(de)(de)(de)相(xiang)角差和(he)電(dian)壓(ya)(ya)差，并估算合環(huan)潮流(liu)保(bao)證不(bu)(bu)超過環(huan)流(liu)限(xian)額。2）解(jie)(jie)環(huan)操(cao)作(zuo)應(ying)(ying)(ying)先檢查解(jie)(jie)環(huan)點(dian)的(de)(de)(de)有功(gong)、無功(gong)潮流(liu)，以確保(bao)解(jie)(jie)環(huan)后系(xi)(xi)統(tong)(tong)(tong)各部(bu)分電(dian)壓(ya)(ya)在(zai)規(gui)定(ding)范(fan)圍(wei)內(nei)，各環(huan)潮流(liu)的(de)(de)(de)變(bian)(bian)化不(bu)(bu)超過繼電(dian)保(bao)護，系(xi)(xi)統(tong)(tong)(tong)穩定(ding)和(he)設(she)備(bei)(bei)容量等方(fang)面的(de)(de)(de)限(xian)額。（9）沖(chong)擊(ji)(ji)(ji)合閘(zha)(zha)、零(ling)起(qi)升(sheng)壓(ya)(ya)操(cao)作(zuo)：變(bian)(bian)壓(ya)(ya)器、母(mu)線等設(she)備(bei)(bei)在(zai)新安裝投(tou)入運行前(qian)、大修后和(he)故(gu)障跳(tiao)閘(zha)(zha)后均應(ying)(ying)(ying)按有關規(gui)定(ding)進(jin)行全(quan)電(dian)壓(ya)(ya)沖(chong)擊(ji)(ji)(ji)操(cao)作(zuo)或零(ling)起(qi)升(sheng)壓(ya)(ya)操(cao)作(zuo)。1）沖(chong)擊(ji)(ji)(ji)合閘(zha)(zha)操(cao)作(zuo)：①沖(chong)擊(ji)(ji)(ji)合閘(zha)(zha)斷(duan)路器要(yao)有足夠的(de)(de)(de)遮斷(duan)容量，且斷(duan)路器故(gu)障跳(tiao)閘(zha)(zha)次數應(ying)(ying)(ying)在(zai)規(gui)定(ding)的(de)(de)(de)次數內(nei)；②沖(chong)擊(ji)(ji)(ji)合閘(zha)(zha)的(de)(de)(de)斷(duan)路器其(qi)保(bao)護裝置應(ying)(ying)(ying)完(wan)整(zheng)并投(tou)入，自(zi)動(dong)重合閘(zha)(zha)應(ying)(ying)(ying)停用，必(bi)要(yao)時應(ying)(ying)(ying)降低保(bao)護的(de)(de)(de)整(zheng)定(ding)值；③盡可能選擇對系(xi)(xi)統(tong)(tong)(tong)穩定(ding)性影響(xiang)較小的(de)(de)(de)電(dian)源做沖(chong)擊(ji)(ji)(ji)合閘(zha)(zha)電(dian)源；④對中性點(dian)接(jie)(jie)地(di)(di)系(xi)(xi)統(tong)(tong)(tong)中的(de)(de)(de)變(bian)(bian)壓(ya)(ya)器沖(chong)擊(ji)(ji)(ji)時，其(qi)中性點(dian)應(ying)(ying)(ying)接(jie)(jie)地(di)(di)。2）零(ling)起(qi)升(sheng)壓(ya)(ya)操(cao)作(zuo)：①被升(sheng)壓(ya)(ya)的(de)(de)(de)設(she)備(bei)(bei)應(ying)(ying)(ying)有完(wan)善(shan)的(de)(de)(de)保(bao)護裝置；②對發電(dian)機一變(bian)(bian)壓(ya)(ya)器組升(sheng)壓(ya)(ya)時，應(ying)(ying)(ying)采用手動(dong)升(sheng)壓(ya)(ya)方(fang)式，不(bu)(bu)采用自(zi)動(dong)升(sheng)壓(ya)(ya)方(fang)式，且發電(dian)機強勵裝置應(ying)(ying)(ying)停用；③中性點(dian)接(jie)(jie)地(di)(di)變(bian)(bian)壓(ya)(ya)器進(jin)行零(ling)起(qi)升(sheng)壓(ya)(ya)時，其(qi)中性點(dian)必(bi)須接(jie)(jie)地(di)(di)。（10）系(xi)(xi)統(tong)(tong)(tong)并、解(jie)(jie)列操(cao)作(zuo)：1）系(xi)(xi)統(tong)(tong)(tong)在(zai)正常(chang)情(qing)況下的(de)(de)(de)并列操(cao)作(zuo)，一般采用準(zhun)同(tong)期法進(jin)行（手動(dong)或自(zi)動(dong)）并列。并列條件為：①相(xiang)序相(xiang)同(tong)；②相(xiang)位(wei)相(xiang)同(tong)；③頻率相(xiang)同(tong)（事(shi)故(gu)時可不(bu)(bu)超過）。

可(ke)分為(wei)(wei)(wei)(wei)：高壓(ya)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、低壓(ya)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)和安(an)全電(dian)壓(ya)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)。按(an)(an)分斷能(neng)力分，可(ke)分為(wei)(wei)(wei)(wei)：高、低分斷能(neng)力保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)。按(an)(an)形狀(zhuang)分，可(ke)分為(wei)(wei)(wei)(wei)：平頭管狀(zhuang)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（又可(ke)分為(wei)(wei)(wei)(wei)內焊保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)與外焊保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)）、尖(jian)頭管狀(zhuang)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、鍘刀式(shi)(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、螺旋式(shi)(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、插(cha)片式(shi)(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、平板式(shi)(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、裹敷式(shi)(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、貼(tie)片式(shi)(shi)(shi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)。按(an)(an)熔斷速度分，可(ke)分為(wei)(wei)(wei)(wei)：特(te)慢速保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（一(yi)般用(yong)TT表(biao)示(shi)(shi)）、慢速保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（一(yi)般用(yong)T表(biao)示(shi)(shi)）、中速保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（一(yi)般用(yong)M表(biao)示(shi)(shi)）、快速保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（一(yi)般用(yong)F表(biao)示(shi)(shi)）、特(te)快速保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（一(yi)般用(yong)FF表(biao)示(shi)(shi)）。按(an)(an)標準分，可(ke)分為(wei)(wei)(wei)(wei)：歐規(gui)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、美規(gui)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、日規(gui)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)。按(an)(an)類型分，可(ke)分為(wei)(wei)(wei)(wei)：電(dian)流保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（貼(tie)片保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、微型保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、插(cha)片保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)、管狀(zhuang)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)），溫度保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（RH[方塊型]、RP[電(dian)阻(zu)型]、RY[金(jin)屬殼(ke)]），自(zi)恢復保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)險(xian)(xian)(xian)(xian)(xian)(xian)絲(si)(si)(si)（插(cha)件、疊片、貼(tie)片）。安(an)裝新熔體前，要找(zhao)出(chu)熔體熔斷原(yuan)因，未確定熔斷原(yuan)因，不要拆換熔體試(shi)送。

摘(zhai)要：純電(dian)(dian)(dian)動(dong)汽車(che)(che)的(de)驅動(dong)部分及(ji)高壓附件系(xi)(xi)統的(de)電(dian)(dian)(dian)源(yuan)均(jun)為動(dong)力(li)(li)(li)電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)源(yuan)，為保(bao)(bao)(bao)護(hu)(hu)車(che)(che)輛及(ji)乘員安全，相(xiang)(xiang)關(guan)動(dong)力(li)(li)(li)電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)源(yuan)回(hui)(hui)路(lu)均(jun)選(xuan)(xuan)用(yong)相(xiang)(xiang)應熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)作(zuo)為短路(lu)保(bao)(bao)(bao)護(hu)(hu)的(de)措施。本文主要從熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)壽命校核，沖擊電(dian)(dian)(dian)流(liu)(liu)對熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)影響(xiang)，熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)分斷(duan)(duan)(duan)(duan)能(neng)力(li)(li)(li)等方面，闡述純電(dian)(dian)(dian)動(dong)汽車(che)(che)直流(liu)(liu)高壓熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)的(de)選(xuan)(xuan)型(xing)(xing)原(yuan)則及(ji)驗證方法(fa)。純電(dian)(dian)(dian)動(dong)汽車(che)(che)的(de)動(dong)力(li)(li)(li)電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)壓多在200~400V，除動(dong)力(li)(li)(li)電(dian)(dian)(dian)池(chi)(chi)總熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)外，還存(cun)在汽車(che)(che)空(kong)調(diao)系(xi)(xi)統，暖風系(xi)(xi)統，DC／DC系(xi)(xi)統（將動(dong)力(li)(li)(li)電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)壓轉換為14V，提供整車(che)(che)低壓電(dian)(dian)(dian)源(yuan)，作(zuo)用(yong)類同(tong)發電(dian)(dian)(dian)機）等其他附件高壓回(hui)(hui)路(lu)，各(ge)回(hui)(hui)路(lu)均(jun)需(xu)串接(jie)直流(liu)(liu)高壓熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)做(zuo)回(hui)(hui)路(lu)保(bao)(bao)(bao)護(hu)(hu)。現階(jie)段(duan)，陸續有(you)(you)EV專用(yong)汽車(che)(che)級熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)推出，但選(xuan)(xuan)擇面還是比(bi)較狹窄。國產(chan)直流(liu)(liu)熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)的(de)分斷(duan)(duan)(duan)(duan)能(neng)力(li)(li)(li)及(ji)保(bao)(bao)(bao)護(hu)(hu)特性均(jun)能(neng)夠(gou)(gou)滿足IEC（國際(ji)電(dian)(dian)(dian)工標準(zhun)化(hua)機構）或其他通用(yong)標準(zhun)，與(yu)相(xiang)(xiang)同(tong)用(yong)途的(de)進口產(chan)品(pin)(pin)差別不大(da)。但在相(xiang)(xiang)關(guan)ROHS（電(dian)(dian)(dian)子電(dian)(dian)(dian)器(qi)設備中(zhong)限制(zhi)使用(yong)某些有(you)(you)害成分的(de)指令）認證、極端條件測試、系(xi)(xi)列產(chan)品(pin)(pin)的(de)自(zi)動(dong)化(hua)生(sheng)產(chan)方面，仍略有(you)(you)差距。直流(liu)(liu)高壓熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)價格稍高，需(xu)在能(neng)夠(gou)(gou)有(you)(you)效保(bao)(bao)(bao)護(hu)(hu)各(ge)系(xi)(xi)統回(hui)(hui)路(lu)的(de)同(tong)時，禁止熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)非(fei)正常熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)現象發生(sheng)。本文將對直流(liu)(liu)高壓熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)的(de)選(xuan)(xuan)型(xing)(xing)原(yuan)則及(ji)驗證方法(fa)做(zuo)系(xi)(xi)統介紹。保(bao)(bao)(bao)險絲保(bao)(bao)(bao)護(hu)(hu)電(dian)(dian)(dian)力(li)(li)(li)設備不受過電(dian)(dian)(dian)流(liu)(liu)過熱的(de)傷害，避免電(dian)(dian)(dian)子設備因內部故障所引起的(de)嚴重傷害。遼寧(ning)熔(rong)(rong)(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)的(de)保(bao)(bao)(bao)護(hu)(hu)

熔斷器的(de)選擇主要依據負載的(de)保護(hu)特性和(he)短(duan)路(lu)電(dian)流的(de)大小選擇熔斷器的(de)類(lei)型。遼寧(ning)熔斷器的(de)保護(hu)

熔(rong)(rong)(rong)管5起(qi)(qi)(qi)絕緣(yuan)、滅弧(hu)作(zuo)(zuo)用(yong)(yong)，外...高壓(ya)跌開式熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)操作(zuo)(zuo)要求來(lai)(lai)源：電(dian)(dian)(dian)子元器(qi)(qi)(qi)(qi)(qi)件(jian)論壇查看：1507回復(fu)：0高壓(ya)跌開式熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)具有熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)保(bao)護和隔離電(dian)(dian)(dian)源的(de)(de)(de)作(zuo)(zuo)用(yong)(yong)，它(ta)(ta)簡單(dan)、經濟、實用(yong)(yong)。在(zai)(zai)農(nong)村(cun)配電(dian)(dian)(dian)線(xian)路及戶外的(de)(de)(de)中(zhong)(zhong)小(xiao)型變壓(ya)器(qi)(qi)(qi)(qi)(qi)上得(de)到的(de)(de)(de)使用(yong)(yong)。在(zai)(zai)實踐中(zhong)(zhong)，通(tong)過對高壓(ya)跌開式熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)操作(zuo)(zuo)的(de)(de)(de)不(bu)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)總結(jie)，人們發現：三相(xiang)(xiang)負(fu)荷在(zai)(zai)開斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)相(xiang)(xiang)時(shi)，斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)口電(dian)(dian)(dian)壓(ya)較(jiao)低(約為)，產生電(dian)(dian)(dian)弧(hu)小(xiao)；開斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)第二(er)相(xiang)(xiang)時(shi)，斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)口電(dian)(dian)(dian)壓(ya)較(jiao)高(為UP=UL)，切斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)路后(hou)往(wang)往(wang)出現強烈電(dian)(dian)(dian)弧(hu)，易使鄰相(xiang)(xiang)短路；拉第三相(xiang)(xiang)時(shi)，因電(dian)(dian)(dian)路已(yi)無電(dian)(dian)(dian)流(liu)，也就不(bu)會產生電(dian)(dian)(dian)唬由此(ci)看來(lai)(lai)拉第二(er)相(xiang)(xiang)是(shi)確(que)保(bao)安全的(de)(de)(de)關鍵。另外，氣流(liu)(刮風、風向)對操作(zuo)(zuo)的(de)(de)(de)安全影響也是(shi)明顯的(de)(de)(de)。當氣流(liu)將(jiang)電(dian)(dian)(dian)弧(hu)拉長(chang)后(hou)，有可能引(yin)起(qi)(qi)(qi)相(xiang)(xiang)間(jian)短路。...熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)工(gong)作(zuo)(zuo)原(yuan)理和選擇來(lai)(lai)源：測(ce)試測(ce)量技術查看：1462回復(fu)：0熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)是(shi)保(bao)護電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)(qi)，常在(zai)(zai)低壓(ya)電(dian)(dian)(dian)路如照明電(dian)(dian)(dian)路中(zhong)(zhong)起(qi)(qi)(qi)過載保(bao)護和短路保(bao)護作(zuo)(zuo)用(yong)(yong)；而在(zai)(zai)電(dian)(dian)(dian)動(dong)機控制電(dian)(dian)(dian)路中(zhong)(zhong)只起(qi)(qi)(qi)短路保(bao)護作(zuo)(zuo)用(yong)(yong)。它(ta)(ta)串聯在(zai)(zai)電(dian)(dian)(dian)路中(zhong)(zhong)，當通(tong)過的(de)(de)(de)電(dian)(dian)(dian)流(liu)大于規定值時(shi)，熔(rong)(rong)(rong)體熔(rong)(rong)(rong)化而自動(dong)分(fen)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)電(dian)(dian)(dian)路。熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)有管式、插入式、螺旋(xuan)式、卡(ka)式等幾種(zhong)形式，其中(zhong)(zhong)部(bu)分(fen)熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)外形和符(fu)號如圖所(suo)示。一(yi)、熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)工(gong)作(zuo)(zuo)原(yuan)理熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)主要元件(jian)是(shi)熔(rong)(rong)(rong)體，它(ta)(ta)是(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)**部(bu)分(fen)，常做成片狀或絲狀。在(zai)(zai)小(xiao)電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)路中(zhong)(zhong)。遼寧熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)保(bao)護

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