塑殼斷路器型號規格

塑殼斷路器（英文簡稱(cheng)為MCCB）主要作用(yong)是為低(di)壓配電系統(tong)和(he)(he)電動(dong)機保(bao)護回路(lu)中的過載(zai)、短路(lu)提(ti)供(gong)特殊的保(bao)護功能。由于其(qi)可靠性和(he)(he)穩定性，因(yin)此，成為工業(ye)上(shang)應用(yong)十分(fen)廣泛的產品。

塑殼(ke)斷路器不(bu)同的型號有不(bu)同的尺寸。斷路器一般(ban)由(you)觸頭(tou)系統、滅弧系統、操作機構(gou)、脫扣器、外(wai)殼(ke)等構(gou)成(cheng)。

塑殼斷路(lu)器的型號(hao)(hao)開頭3個(ge)字母(mu)為系列(lie)代(dai)號(hao)(hao)有NS,NSX,NSE,CVS,EZD。代(dai)號(hao)(hao)之(zhi)后是開關殼架電流+開關分斷能(neng)力代(dai)號(hao)(hao)，如NSX100N殼架電流100A。分斷能(neng)力N為50KA。

開(kai)關極(ji)數和脫(tuo)扣(kou)器類型(xing)和開(kai)關額定電(dian)流如:NSX100N3P3DTM25D NSX系列，殼(ke)架電(dian)流100A,3P3D為(wei)3極(ji),TMD為(wei)熱磁脫(tuo)扣(kou)25為(wei)額定電(dian)流25A。

塑殼式(shi)斷(duan)路器一般用于配電(dian)饋線控(kong)制(zhi)(zhi)和保護，小型配電(dian)變壓(ya)器的(de)低壓(ya)側出線總開關(guan)，動力配電(dian)終端(duan)控(kong)制(zhi)(zhi)，也可用于各(ge)種生產機械的(de)電(dian)源開關(guan)。

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斷路器殼架等級

斷(duan)路器(qi)殼架等級額(e)定電流是指基本尺寸相(xiang)同的框架和(he)塑料外(wai)殼中能裝的最大脫扣器(qi)的額(e)定電流。

斷(duan)路(lu)(lu)器(qi)額定電(dian)流(liu)是指(zhi)斷(duan)路(lu)(lu)器(qi)中的(de)脫(tuo)扣(kou)器(qi)能(neng)長期通(tong)過的(de)電(dian)流(liu)，又稱斷(duan)路(lu)(lu)器(qi)脫(tuo)扣(kou)器(qi)額定電(dian)流(liu)。

同(tong)(tong)(tong)一(yi)系列中(zhong)(zhong)有多(duo)種(zhong)殼(ke)架(jia)等(deng)(deng)級(ji)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，同(tong)(tong)(tong)一(yi)殼(ke)架(jia)等(deng)(deng)級(ji)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)又有多(duo)種(zhong)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。例如(ru)DZ20系列中(zhong)(zhong)有100、225、400、630、800、1250等(deng)(deng)殼(ke)架(jia)等(deng)(deng)級(ji)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，而(er)100殼(ke)架(jia)等(deng)(deng)級(ji)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)有16A、20A、25A、32A、40A、50A、63A、80A、100A額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu);225A殼(ke)架(jia)等(deng)(deng)級(ji)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)有100A，125A、160A、180A、200A、225A額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。DZ20—100和(he)(he)(he)DZ20—225兩種(zhong)殼(ke)架(jia)等(deng)(deng)級(ji)中(zhong)(zhong)都有100A額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，但斷路(lu)器體積(ji)外形和(he)(he)(he)分斷能力不(bu)相同(tong)(tong)(tong)，因(yin)此(ci)在(zai)選(xuan)用(yong)時(shi)要(yao)把型號填寫完(wan)整即具體的(de)(de)(de)殼(ke)架(jia)等(deng)(deng)級(ji)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)內(nei)的(de)(de)(de)斷路(lu)器額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)分級(ji)是(shi)(shi)(shi)按 (1.25)優先系數來選(xuan)擇的(de)(de)(de)：一(yi)方(fang)面是(shi)(shi)(shi)符合(he)和(he)(he)(he)滿足最(zui)大(da)線路(lu)和(he)(he)(he)電(dian)(dian)(dian)(dian)器元件額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)需要(yao);另一(yi)方(fang)面是(shi)(shi)(shi)為(wei)(wei)了標準化，以取得最(zui)佳的(de)(de)(de)使用(yong)導線及加工的(de)(de)(de)效益。因(yin)此(ci)它所規(gui)定(ding)(ding)(ding)(ding)的(de)(de)(de)級(ji)別是(shi)(shi)(shi)：3(6)、8、10、12.5、16，20、25、32、40、50、63、80，100、125、160、200、250、315、400A等(deng)(deng)。由于此(ci)規(gui)定(ding)(ding)(ding)(ding)，當(dang)線路(lu)計算(suan)負載為(wei)(wei)90A時(shi)，則(ze)只能選(xuan)100A規(gui)格，因(yin)此(ci)在(zai)一(yi)定(ding)(ding)(ding)(ding)程度上影響(xiang)它的(de)(de)(de)保護性能。

脫(tuo)扣(kou)器(qi)(qi)電(dian)(dian)(dian)(dian)流(liu)(liu)整(zheng)定(ding)(ding)(ding)值(zhi)是(shi)(shi)指脫(tuo)扣(kou)器(qi)(qi)調(diao)整(zheng)到(dao)動作電(dian)(dian)(dian)(dian)流(liu)(liu)值(zhi)。它是(shi)(shi)指額(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)In的倍(bei)數(shu)，是(shi)(shi)動作電(dian)(dian)(dian)(dian)流(liu)(liu)值(zhi)，例如：過電(dian)(dian)(dian)(dian)流(liu)(liu)整(zheng)定(ding)(ding)(ding)到(dao)電(dian)(dian)(dian)(dian)流(liu)(liu)的1.2、1.3、5、10倍(bei)，就寫成Ir=1.2In，1.3In、5In、10In等。現在一些電(dian)(dian)(dian)(dian)子脫(tuo)扣(kou)器(qi)(qi)，它的過載長(chang)延時額(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)是(shi)(shi)可調(diao)的，所調(diao)整(zheng)的電(dian)(dian)(dian)(dian)流(liu)(liu)，其實仍是(shi)(shi)額(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，是(shi)(shi)可長(chang)期(qi)通過的最大電(dian)(dian)(dian)(dian)流(liu)(liu)。

額定工(gong)作(zuo)電流(liu)是斷(duan)路器在(zai)裝輔助觸頭(tou)(附件)時觸點在(zai)一定工(gong)作(zuo)電壓下的(de)實(shi)際(ji)工(gong)作(zuo)電流(liu)，電流(liu)為3A或6A，用(yong)于控制和(he)保護回路。

塑殼斷路器選型

1、阻抗百分比-與變壓器短路電壓百分比相等

阻抗電壓百分比又稱短路電壓百分比，表明變壓器內阻抗的大小。變壓(ya)器(qi)的(de)短路(lu)阻(zu)抗百分比(bi),在(zai)數值上與變壓(ya)器(qi)短路(lu)電(dian)壓(ya)百分比(bi)相等(deng)。它是指(zhi)將變壓(ya)器(qi)二(er)次(ci)繞(rao)阻(zu)短路(lu)，在(zai)一次(ci)繞(rao)阻(zu)施(shi)加電(dian)壓(ya)，當二(er)次(ci)繞(rao)阻(zu)通過額定電(dian)流(liu)時，一次(ci)繞(rao)阻(zu)施(shi)加的(de)電(dian)壓(ya)與額定電(dian)壓(ya)之(zhi)比(bi)的(de)百分數。

變(bian)壓(ya)(ya)器的(de)短路阻抗值百分比是變(bian)壓(ya)(ya)器的(de)一個重(zhong)(zhong)要(yao)參數,它表明變(bian)壓(ya)(ya)器內阻抗的(de)大(da)(da)小，即變(bian)壓(ya)(ya)器在(zai)(zai)額定負荷運行時變(bian)壓(ya)(ya)器本(ben)身的(de)阻抗壓(ya)(ya)降大(da)(da)小。它對于(yu)變(bian)壓(ya)(ya)器在(zai)(zai)二(er)次側發(fa)生(sheng)突然短路時，會產生(sheng)多大(da)(da)的(de)短路電流(liu)有決定性的(de)意義(yi)，對變(bian)壓(ya)(ya)器制造(zao)價格(ge)大(da)(da)小和變(bian)壓(ya)(ya)器并(bing)列運行也有重(zhong)(zhong)要(yao)意義(yi)。

由于這些特點，于是(shi)短路(lu)阻抗值習慣使用(yong)(yong)百分比數值。如果在某些場合需要(yao)使用(yong)(yong)實際數值計(ji)算，當然要(yao)換算。

2、額定電壓選擇

即塑料外殼式斷路器的(de)(de)電(dian)(dian)壓等(deng)級是多少，常(chang)見的(de)(de)抵押配電(dian)(dian)系(xi)統(tong)為(wei)400v，如小(xiao)區(qu)住宅區(qu)，配電(dian)(dian)房的(de)(de)配電(dian)(dian)電(dian)(dian)壓配比為(wei)10/0.4，一般采用TN-C-S或TN-S系(xi)統(tong)，變壓器的(de)(de)中性點(dian)直接接地，當然也不排(pai)除690v，如風電(dian)(dian)場新能源發電(dian)(dian)，所以選擇斷路(lu)器額定電(dian)(dian)壓與系(xi)統(tong)電(dian)(dian)壓相(xiang)適應(ying)，塑(su)殼斷路(lu)器的(de)(de)極限分段能力與額定電(dian)(dian)壓息息相(xiang)關。

3、額定極限分斷電流ICU

根據GB14048.2低壓斷路器(qi)標準，是指(zhi)斷路器(qi)一(yi)次短(duan)路后不要求再承受(shou)起額定電流的分斷能(neng)力(li)，后者一(yi)般為前者的百分之25，50，75，100。

塑殼斷(duan)路(lu)(lu)器的(de)額(e)定極限分斷(duan)電(dian)(dian)流(liu)ICU和(he)額(e)定運(yun)行短路(lu)(lu)電(dian)(dian)流(liu)ics與額(e)定電(dian)(dian)壓有關系，同一(yi)型號的(de)塑殼斷(duan)路(lu)(lu)器在(zai)不同額(e)定電(dian)(dian)壓下(xia)(xia)，其分斷(duan)能(neng)(neng)(neng)力(li)不一(yi)樣，電(dian)(dian)壓能(neng)(neng)(neng)級越(yue)高滅弧越(yue)困難，斷(duan)路(lu)(lu)器能(neng)(neng)(neng)分斷(duan)的(de)短路(lu)(lu)電(dian)(dian)流(liu)越(yue)低。如下(xia)(xia)圖塑殼斷(duan)路(lu)(lu)器NSX100F，在(zai)85/415v電(dian)(dian)壓下(xia)(xia)，分斷(duan)能(neng)(neng)(neng)力(li)為36kA,660/690v額(e)定電(dian)(dian)壓下(xia)(xia)為8KA。

4、短路器的額定電流

斷路器的額定電流等于額定不間斷電流Iu且等于約定自由空氣發(fa)熱電流(liu)Ith，也(ye)就是(shi)(shi)斷(duan)路(lu)器(qi)能連續(xu)承載且不超高(gao)溫升(sheng)的(de)(de)(de)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，斷(duan)路(lu)器(qi)的(de)(de)(de)殼架電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)指斷(duan)路(lu)器(qi)能裝的(de)(de)(de)最(zui)大的(de)(de)(de)過(guo)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)脫(tuo)扣器(qi)的(de)(de)(de)額定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，如NSX100斷(duan)路(lu)器(qi)有兩(liang)種反時(shi)限過(guo)電(dian)(dian)脫(tuo)扣器(qi)的(de)(de)(de)額定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)等(deng)級40A和100A，100A是(shi)(shi)NSX100F的(de)(de)(de)殼架電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，反時(shi)限過(guo)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)脫(tuo)扣器(qi)整定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)是(shi)(shi)根據線路(lu)計算電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)和導體長期運行(xing)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)在脫(tuo)扣器(qi)上整定(ding)的(de)(de)(de)電(dian)(dian)流(liu)(liu)(liu)(liu)(liu)值。