直流(liu)(liu)(liu)(liu)分(fen)流(liu)(liu)(liu)(liu)器(qi)(qi) 分(fen)流(liu)(liu)(liu)(liu)器(qi)(qi)是(shi)(shi)測量直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)用的(de),分(fen)流(liu)(liu)(liu)(liu)器(qi)(qi)是(shi)(shi)分(fen)流(liu)(liu)(liu)(liu)器(qi)(qi)是(shi)(shi)測量直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)用的(de),根(gen)據直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)通過電(dian)(dian)(dian)阻(zu)(zu)時(shi)在電(dian)(dian)(dian)阻(zu)(zu)兩(liang)端產(chan)生電(dian)(dian)(dian)壓的(de)原理制(zhi)(zhi)成,分(fen)流(liu)(liu)(liu)(liu)器(qi)(qi)是(shi)(shi)指(zhi)測量直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)用的(de),根(gen)據直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)通過電(dian)(dian)(dian)阻(zu)(zu)時(shi)在電(dian)(dian)(dian)阻(zu)(zu)兩(liang)端產(chan)生電(dian)(dian)(dian)壓的(de)原理制(zhi)(zhi)成上海康登電(dian)(dian)(dian)氣科技有限公司可以定制(zhi)(zhi)分(fen)流(liu)(liu)(liu)(liu)器(qi)(qi)提供方案。
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直流分流器
直流分流器
FL-2型分流器原理及接線方法
直流FL-2型分流器定義:
分(fen)流(liu)器實際就是一個阻值很小的電阻,當有直流(liu)電流(liu)通過時(shi),產生壓降,供直流(liu)電流(liu)表顯示;
直流電(dian)(dian)流表實際是電(dian)(dian)壓(ya)表,滿度值75mV;
直(zhi)流(liu)電流(liu)表和分流(liu)器是配套使用的;
比如(ru):100A電流(liu)表配套的(de)分流(liu)器阻值為0.00075歐;
即100A*0.00075歐=75mV;
50A電流(liu)表(biao)配套的分流(liu)器阻值為0.0015歐(ou);
50A*0.0015歐=75mV。
二,測量:
要測量(liang)(liang)一個(ge)(ge)很大的(de)直流(liu)電(dian)(dian)(dian)流(liu),例如幾十安(an)培,甚至更大,幾百安(an)培,沒(mei)有(you)那么大量(liang)(liang)程的(de)電(dian)(dian)(dian)流(liu)表進行電(dian)(dian)(dian)流(liu)的(de)測量(liang)(liang),怎么辦?這(zhe)(zhe)就要采用分流(liu)器(qi).分流(liu)器(qi)是(shi)一個(ge)(ge)可以(yi)通過大電(dian)(dian)(dian)流(liu)的(de)電(dian)(dian)(dian)阻,當電(dian)(dian)(dian)流(liu)流(liu)過分流(liu)器(qi)時,在它(ta)的(de)兩端(duan)就會出現一個(ge)(ge)毫伏級的(de)電(dian)(dian)(dian)壓(ya)(ya),于是(shi)用毫伏電(dian)(dian)(dian)壓(ya)(ya)表來測量(liang)(liang)這(zhe)(zhe)個(ge)(ge)電(dian)(dian)(dian)壓(ya)(ya),再將(jiang)這(zhe)(zhe)個(ge)(ge)電(dian)(dian)(dian)壓(ya)(ya)換算成電(dian)(dian)(dian)流(liu).就完成了大電(dian)(dian)(dian)流(liu)的(de)測量(liang)(liang)。
電(dian)(dian)(dian)流(liu)表(biao)(biao)有多種不同(tong)規格(ge),但是(shi)實際表(biao)(biao)頭(tou)卻(que)是(shi)標準(zhun)的(de)毫伏電(dian)(dian)(dian)壓表(biao)(biao)。比如是(shi)一種滿刻度為75mv的(de)電(dian)(dian)(dian)壓表(biao)(biao)。 那(nei)么用(yong)這塊(kuai)電(dian)(dian)(dian)壓表(biao)(biao)測量(liang)比如20A的(de)電(dian)(dian)(dian)流(liu),就需(xu)要給它配一個(ge)在(zai)流(liu)過20A電(dian)(dian)(dian)流(liu)時候產生75mv電(dian)(dian)(dian)壓降的(de)分流(liu)電(dian)(dian)(dian)阻,也(ye)稱75mv分流(liu)器。
分(fen)流(liu)(liu)器(qi)(qi)就是(shi)一(yi)個能夠通過極大電(dian)(dian)(dian)(dian)流(liu)(liu)的電(dian)(dian)(dian)(dian)阻一(yi)般常(chang)用的1或20A以及3的電(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)都(dou)需要(yao)分(fen)流(liu)(liu)器(qi)(qi),分(fen)流(liu)(liu)器(qi)(qi)的阻抗=表(biao)頭標(biao)志滿度(du)(du)(du)電(dian)(dian)(dian)(dian)壓(ya)/表(biao)頭滿度(du)(du)(du)電(dian)(dian)(dian)(dian)流(liu)(liu)。比如20A的電(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)的分(fen)流(liu)(liu)器(qi)(qi)阻值(zhi)=75mv*10-3/20A=0.00375Ω,阻抗恒定后根據歐姆定律U=IR,電(dian)(dian)(dian)(dian)流(liu)(liu)與電(dian)(dian)(dian)(dian)壓(ya)成正比,電(dian)(dian)(dian)(dian)流(liu)(liu)為(wei)線(xian)形電(dian)(dian)(dian)(dian)壓(ya)也呈線(xian)形,所以就可以用一(yi)個滿度(du)(du)(du)為(wei)75mv的電(dian)(dian)(dian)(dian)壓(ya)表(biao)顯示(shi)當(dang)前電(dian)(dian)(dian)(dian)流(liu)(liu)。因此,使用的電(dian)(dian)(dian)(dian)流(liu)(liu)表(biao)實際是(shi)一(yi)塊電(dian)(dian)(dian)(dian)壓(ya)表(biao)。
交(jiao)流(liu)大(da)電(dian)(dian)(dian)流(liu)怎么(me)測量呢?采(cai)用電(dian)(dian)(dian)流(liu)互感器,將大(da)電(dian)(dian)(dian)流(liu)以一定變比變成5安培以下的小電(dian)(dian)(dian)流(liu),于是用小量程交(jiao)流(liu)電(dian)(dian)(dian)流(liu)表就可(ke)測量大(da)電(dian)(dian)(dian)流(liu)了(le),只是測得(de)的電(dian)(dian)(dian)流(liu)還要乘那個變比。
就是(shi)一(yi)根短的導體,可以是(shi)各種(zhong)金(jin)屬(shu)或合金(jin)的,也(ye)連接(jie)端子;其直流(liu)電(dian)(dian)(dian)(dian)阻(zu)是(shi)嚴格調好(hao)的;串接(jie)在(zai)直流(liu)電(dian)(dian)(dian)(dian)路里(li),直流(liu)電(dian)(dian)(dian)(dian)流(liu)過分(fen)流(liu)器,分(fen)流(liu)器兩(liang)(liang)端產(chan)生(sheng)毫伏(fu)級直流(liu)電(dian)(dian)(dian)(dian)壓信號,使(shi)并接(jie)在(zai)該(gai)(gai)分(fen)流(liu)器兩(liang)(liang)端的計量表指針擺動,該(gai)(gai)讀(du)數就是(shi)該(gai)(gai)直流(liu)電(dian)(dian)(dian)(dian)路里(li)的電(dian)(dian)(dian)(dian)流(liu)值。所(suo)謂分(fen)流(liu),即分(fen)一(yi)小(xiao)的電(dian)(dian)(dian)(dian)流(liu)去推動表指示,該(gai)(gai)小(xiao)電(dian)(dian)(dian)(dian)流(liu)(mA)與大回路里(li)的電(dian)(dian)(dian)(dian)流(liu)(1A-幾十A)比例越小(xiao),電(dian)(dian)(dian)(dian)流(liu)表指示讀(du)數的線性就越好(hao),也(ye)更。這是(shi)電(dian)(dian)(dian)(dian)工(gong)電(dian)(dian)(dian)(dian)路的常用產(chan)品,防雷有分(fen)流(liu)措施。
三,分流器選型敘述:
FL-2型系列(lie)250A/75mV和300A/75mV分流(liu)器(qi)主要(yao)由錳銅片(Cu-Mn)和銅接(jie)頭(tou)焊接(jie)構成,在(zai)分流(liu)器(qi)兩(liang)端的接(jie)頭(tou)上有(you)兩(liang)組(zu)接(jie)線(xian)(xian)端鈕(niu):外邊(bian)一(yi)組(zu)為電(dian)位(wei)端鈕(niu),供(gong)與(yu)電(dian)源(yuan)線(xian)(xian)連接(jie),內邊(bian)一(yi)組(zu)為電(dian)位(wei)端鈕(niu)供(gong)與(yu)測量儀表連接(jie),本(ben)公司(si)專業生(sheng)產各(ge)類固定(ding)(ding)(ding)式定(ding)(ding)(ding)值(zhi)分流(liu)器(qi)和精密(mi)合(he)金電(dian)阻器(qi)的電(dian)參數(shu)和尺寸,同時我們能為客戶定(ding)(ding)(ding)做不同款式(包括出口型)的特(te)殊分流(liu)器(qi).如有(you)特(te)殊要(yao)求可訂制訂貨。高于150A/75mV的分流(liu)器(qi)如仍然需要(yao)增加底座(zuo)隔離(li),本(ben)公司(si)通常使用耐高溫材(cai)料( 美國(guo)杜邦:HTNFR52G15BL,熔點:310度 防火V0 注塑級(ji))
FL-2型(xing)系(xi)列分流器其(qi)精度為(wei):0.5級(ji),規格范圍有:1A-15000A,二次電壓:20mV、30mV、50mV、60mV、75mV、100mV、150mV等(deng),常(chang)(chang)規為(wei)75mV。通常(chang)(chang)2000A以上都改良為(wei)FL-29型(xing)或(huo)FL-39型(xing)外徑尺寸(cun)。
一.產品(pin)用(yong)(yong)途:分流器廣泛(fan)用(yong)(yong)于擴大儀表測量電流范(fan)圍(wei),均可用(yong)(yong)于通訊系統
電(dian)子(zi)整機自動化控制(zhi)的電(dian)源等回路(lu)作限流(liu)(liu).均流(liu)(liu).取樣.檢測作用(yong)(yong),使用(yong)(yong)條件為 B
組。
二.主要技術參數:
1.準確度等(deng)級:5~4000A:0.5 級,5000A~10000A:1 級。
2.使用環境條(tiao)件(jian): -40~+60℃,相對濕(shi)度(du)≤95%(35℃)
3.耐機械性能(neng)(neng):能(neng)(neng)承受加速(su)度(du)為 70 米/秒及沖擊(ji)頻率每分鐘
80~120 次 6 小(xiao)時(shi)的運輸(shu)顛震。
4.超載性能(neng):額定電流 120%,2 小(xiao)時。
5.電(dian)壓降:50mV,75mV,100mV,200mV,300mV.
6.負載下發熱:溫升變化趨穩(wen)定電流 50A 以(yi)下不(bu)(bu)超過(guo)(guo) 80℃。 額定電流 50A 以(yi)上不(bu)(bu)超過(guo)(guo) 120℃。
三(san).分流(liu)器型號表示(shi)規則:
FL-2 200A 75mV 0.5%
(型(xing)號) (電(dian)流(liu)) (壓降) (精度)
四.分流器原理及接線方法
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