互(hu)感器(qi)(qi)又稱為(wei)儀(yi)用變(bian)(bian)壓(ya)器(qi)(qi)，是電(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感器(qi)(qi)和電(dian)(dian)(dian)(dian)壓(ya)互(hu)感器(qi)(qi)的統(tong)稱。能將高(gao)(gao)電(dian)(dian)(dian)(dian)壓(ya)變(bian)(bian)成(cheng)(cheng)低(di)電(dian)(dian)(dian)(dian)壓(ya)、大電(dian)(dian)(dian)(dian)流(liu)(liu)變(bian)(bian)成(cheng)(cheng)小電(dian)(dian)(dian)(dian)流(liu)(liu)，用于量測或(huo)(huo)保(bao)護(hu)系統(tong)。其功能主(zhu)要是將高(gao)(gao)電(dian)(dian)(dian)(dian)壓(ya)或(huo)(huo)大電(dian)(dian)(dian)(dian)流(liu)(liu)按比(bi)例(li)變(bian)(bian)換(huan)成(cheng)(cheng)標準(zhun)低(di)電(dian)(dian)(dian)(dian)壓(ya)（100V）或(huo)(huo)標準(zhun)小電(dian)(dian)(dian)(dian)流(liu)(liu)（5A或(huo)(huo)1A，均指額定值），以便(bian)實現測量儀(yi)表(biao)、保(bao)護(hu)設備(bei)(bei)(bei)及自動控制設備(bei)(bei)(bei)的標 準(zhun)化、小型化。同(tong)時(shi)互(hu)感器(qi)(qi)還可用來隔開高(gao)(gao)電(dian)(dian)(dian)(dian)壓(ya)系統(tong)，以保(bao)證人身(shen)和設備(bei)(bei)(bei)的安(an)全。
