一、互感器的作用是什么
互(hu)感(gan)(gan)(gan)器是電(dian)(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)(gan)器和(he)(he)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)互(hu)感(gan)(gan)(gan)器的(de)(de)統稱,又被稱為儀(yi)用(yong)(yong)變壓(ya)(ya)(ya)器。互(hu)感(gan)(gan)(gan)器被廣泛應用(yong)(yong)于供電(dian)(dian)(dian)(dian)系統中向(xiang)測量(liang)儀(yi)表(biao)和(he)(he)繼電(dian)(dian)(dian)(dian)器的(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)線(xian)圈或電(dian)(dian)(dian)(dian)流(liu)線(xian)圈供電(dian)(dian)(dian)(dian)。互(hu)感(gan)(gan)(gan)器的(de)(de)作用(yong)(yong)是將交流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)和(he)(he)大電(dian)(dian)(dian)(dian)流(liu)按(an)比例降到(dao)可(ke)以用(yong)(yong)儀(yi)表(biao)直接測量(liang)的(de)(de)數值(zhi),便于儀(yi)表(biao)直接測量(liang),同時為繼電(dian)(dian)(dian)(dian)保護(hu)和(he)(he)自動裝置提(ti)供電(dian)(dian)(dian)(dian)源。
二、互感器怎么看倍數
電(dian)流(liu)(liu)互(hu)(hu)(hu)感(gan)器的倍(bei)率與互(hu)(hu)(hu)感(gan)器的變比(bi)有關,在互(hu)(hu)(hu)感(gan)器銘(ming)牌上(shang)有標識。電(dian)表的倍(bei)數(shu)=電(dian)流(liu)(liu)互(hu)(hu)(hu)感(gan)器變比(bi)乘(cheng)以電(dian)壓(ya)互(hu)(hu)(hu)感(gan)器變比(bi),當(dang)沒有電(dian)壓(ya)互(hu)(hu)(hu)感(gan)器,其變比(bi)按1計算,例如,一(yi)次額定電(dian)流(liu)(liu)為100A,二次額定電(dian)流(liu)(liu)為5A,那么該互(hu)(hu)(hu)感(gan)器的倍(bei)率為100/5=20。
三、互感器的原理是什么
電流(liu)互(hu)(hu)感器的(de)(de)原理是依據電磁感應原理,它(ta)的(de)(de)一次繞組經常有線路的(de)(de)全部電流(liu)流(liu)過,電流(liu)互(hu)(hu)感器在工(gong)作時(shi),它(ta)的(de)(de)2次回路始終(zhong)是閉合的(de)(de),因此測量儀表和保護(hu)回路串聯線圈的(de)(de)阻抗很小,電流(liu)互(hu)(hu)感器的(de)(de)工(gong)作狀態接近(jin)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需求選擇合適的規格,安全(quan)性能比(bi)較要強。