一、互感器的作用是什么
互(hu)(hu)感(gan)器(qi)是(shi)(shi)電(dian)(dian)(dian)流互(hu)(hu)感(gan)器(qi)和電(dian)(dian)(dian)壓(ya)互(hu)(hu)感(gan)器(qi)的統(tong)稱(cheng),又被稱(cheng)為儀(yi)用(yong)變壓(ya)器(qi)。互(hu)(hu)感(gan)器(qi)被廣泛應用(yong)于供(gong)(gong)電(dian)(dian)(dian)系統(tong)中(zhong)向測量(liang)(liang)儀(yi)表(biao)和繼電(dian)(dian)(dian)器(qi)的電(dian)(dian)(dian)壓(ya)線(xian)圈(quan)或電(dian)(dian)(dian)流線(xian)圈(quan)供(gong)(gong)電(dian)(dian)(dian)。互(hu)(hu)感(gan)器(qi)的作(zuo)用(yong)是(shi)(shi)將交流電(dian)(dian)(dian)壓(ya)和大電(dian)(dian)(dian)流按比例降(jiang)到可以用(yong)儀(yi)表(biao)直(zhi)接測量(liang)(liang)的數值,便于儀(yi)表(biao)直(zhi)接測量(liang)(liang),同時為繼電(dian)(dian)(dian)保護和自動裝置提(ti)供(gong)(gong)電(dian)(dian)(dian)源。
二、互感器怎么看倍數
電(dian)(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)器的倍率與互(hu)感(gan)(gan)器的變比有關(guan),在互(hu)感(gan)(gan)器銘牌上有標識。電(dian)(dian)(dian)(dian)表的倍數(shu)=電(dian)(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)器變比乘(cheng)以電(dian)(dian)(dian)(dian)壓互(hu)感(gan)(gan)器變比,當(dang)沒有電(dian)(dian)(dian)(dian)壓互(hu)感(gan)(gan)器,其變比按(an)1計算,例如,一(yi)次額定電(dian)(dian)(dian)(dian)流(liu)為100A,二次額定電(dian)(dian)(dian)(dian)流(liu)為5A,那么該互(hu)感(gan)(gan)器的倍率為100/5=20。
三、互感器的原理是什么
電流互感器的(de)原(yuan)理是依據電磁(ci)感應原(yuan)理,它(ta)的(de)一次(ci)繞組經常有(you)線路的(de)全部電流流過(guo),電流互感器在工(gong)(gong)作時,它(ta)的(de)2次(ci)回路始(shi)終是閉合的(de),因此(ci)測量儀表和保(bao)護回路串(chuan)聯線圈的(de)阻抗(kang)很小,電流互感器的(de)工(gong)(gong)作狀態接近短路。
四、互感器的規格
互感器的規格通常指的是互感器變比的規格,電流互感器變比的規格很多:50/5,75/5,100/5,150/5,200/5,250/5,300/5,400/5,600/5,800/5,1000/5,1200/5,2000/5,4000/5,選購互感器品牌時注意根據(ju)需求選擇合適的(de)規格,安全性能比較要強。