一、互感器的作用是什么
互(hu)感(gan)器是電(dian)(dian)(dian)(dian)流互(hu)感(gan)器和電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)互(hu)感(gan)器的(de)統稱,又被(bei)稱為(wei)儀(yi)用(yong)變壓(ya)(ya)(ya)器。互(hu)感(gan)器被(bei)廣泛應(ying)用(yong)于供電(dian)(dian)(dian)(dian)系統中向測(ce)量(liang)儀(yi)表和繼電(dian)(dian)(dian)(dian)器的(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)線圈或電(dian)(dian)(dian)(dian)流線圈供電(dian)(dian)(dian)(dian)。互(hu)感(gan)器的(de)作用(yong)是將交流電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)和大電(dian)(dian)(dian)(dian)流按比例降到可以用(yong)儀(yi)表直接(jie)測(ce)量(liang)的(de)數值,便于儀(yi)表直接(jie)測(ce)量(liang),同時為(wei)繼電(dian)(dian)(dian)(dian)保護和自動裝(zhuang)置提供電(dian)(dian)(dian)(dian)源。
二、互感器怎么看倍數
電(dian)流(liu)互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi)的(de)倍率與互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi)的(de)變(bian)(bian)比(bi)有關(guan),在(zai)互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi)銘牌(pai)上有標識(shi)。電(dian)表的(de)倍數=電(dian)流(liu)互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi)變(bian)(bian)比(bi)乘以電(dian)壓互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi)變(bian)(bian)比(bi),當(dang)沒有電(dian)壓互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi),其變(bian)(bian)比(bi)按1計算,例如,一次額定電(dian)流(liu)為100A,二(er)次額定電(dian)流(liu)為5A,那么該(gai)互(hu)(hu)(hu)感(gan)(gan)(gan)器(qi)(qi)的(de)倍率為100/5=20。
三、互感器的原理是什么
電流互感器(qi)的(de)(de)原(yuan)理(li)是(shi)依據(ju)電磁感應(ying)原(yuan)理(li),它的(de)(de)一次繞組(zu)經(jing)常有線路的(de)(de)全部電流流過,電流互感器(qi)在(zai)工(gong)(gong)作(zuo)時,它的(de)(de)2次回路始終是(shi)閉合(he)的(de)(de),因(yin)此測(ce)量儀表和保護回路串聯線圈(quan)的(de)(de)阻(zu)抗很(hen)小,電流互感器(qi)的(de)(de)工(gong)(gong)作(zuo)狀態接近短(duan)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需求選擇合適(shi)的規格,安全性能比較要強。