一、互感器的作用是什么
互感器(qi)(qi)(qi)是電(dian)(dian)流(liu)(liu)互感器(qi)(qi)(qi)和(he)電(dian)(dian)壓(ya)互感器(qi)(qi)(qi)的(de)統(tong)稱,又被稱為儀用(yong)變(bian)壓(ya)器(qi)(qi)(qi)。互感器(qi)(qi)(qi)被廣泛應(ying)用(yong)于(yu)供(gong)電(dian)(dian)系統(tong)中向測量(liang)(liang)儀表和(he)繼電(dian)(dian)器(qi)(qi)(qi)的(de)電(dian)(dian)壓(ya)線圈或電(dian)(dian)流(liu)(liu)線圈供(gong)電(dian)(dian)。互感器(qi)(qi)(qi)的(de)作用(yong)是將交流(liu)(liu)電(dian)(dian)壓(ya)和(he)大電(dian)(dian)流(liu)(liu)按比例降到可以用(yong)儀表直接測量(liang)(liang)的(de)數值,便于(yu)儀表直接測量(liang)(liang),同時(shi)為繼電(dian)(dian)保護(hu)和(he)自動裝置提供(gong)電(dian)(dian)源。
二、互感器怎么看倍數
電(dian)流(liu)(liu)(liu)互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi)的(de)倍(bei)率與互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi)的(de)變(bian)比(bi)(bi)有關,在互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi)銘(ming)牌上有標識。電(dian)表(biao)的(de)倍(bei)數(shu)=電(dian)流(liu)(liu)(liu)互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi)變(bian)比(bi)(bi)乘(cheng)以電(dian)壓互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi)變(bian)比(bi)(bi),當沒有電(dian)壓互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi),其(qi)變(bian)比(bi)(bi)按1計算,例如,一次額(e)定(ding)電(dian)流(liu)(liu)(liu)為100A,二次額(e)定(ding)電(dian)流(liu)(liu)(liu)為5A,那么該互(hu)(hu)(hu)(hu)(hu)感器(qi)(qi)的(de)倍(bei)率為100/5=20。
三、互感器的原理是什么
電(dian)(dian)流(liu)互(hu)(hu)感器(qi)(qi)的原(yuan)理是(shi)依據(ju)電(dian)(dian)磁感應原(yuan)理,它(ta)(ta)的一次(ci)繞(rao)組經常有線(xian)路(lu)(lu)的全部(bu)電(dian)(dian)流(liu)流(liu)過,電(dian)(dian)流(liu)互(hu)(hu)感器(qi)(qi)在工(gong)作時,它(ta)(ta)的2次(ci)回路(lu)(lu)始終是(shi)閉合(he)的,因此測量儀(yi)表和保(bao)護回路(lu)(lu)串(chuan)聯線(xian)圈的阻抗很小,電(dian)(dian)流(liu)互(hu)(hu)感器(qi)(qi)的工(gong)作狀態接近短(duan)路(lu)(lu)。
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(zhu)意根(gen)據需求(qiu)選擇合(he)適的規格,安全性(xing)能比較(jiao)要(yao)強。