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      互(hu)感(gan)(gan)(gan)器(qi)(qi)又(you)稱(cheng)為儀用(yong)變(bian)(bian)(bian)(bian)壓(ya)(ya)(ya)器(qi)(qi)，是電(dian)(dian)(dian)流互(hu)感(gan)(gan)(gan)器(qi)(qi)和電(dian)(dian)(dian)壓(ya)(ya)(ya)互(hu)感(gan)(gan)(gan)器(qi)(qi)的(de)統(tong)稱(cheng)。能將高電(dian)(dian)(dian)壓(ya)(ya)(ya)變(bian)(bian)(bian)(bian)成(cheng)低電(dian)(dian)(dian)壓(ya)(ya)(ya)、大電(dian)(dian)(dian)流變(bian)(bian)(bian)(bian)成(cheng)小電(dian)(dian)(dian)流，用(yong)于量測或保(bao)護(hu)系(xi)統(tong)。其功(gong)能主要是將高電(dian)(dian)(dian)壓(ya)(ya)(ya)或大電(dian)(dian)(dian)流按比例變(bian)(bian)(bian)(bian)換成(cheng)標(biao)準低電(dian)(dian)(dian)壓(ya)(ya)(ya)（100V）或標(biao)準小電(dian)(dian)(dian)流（5A或1A，均指額定值），以便實現測量儀表、保(bao)護(hu)設(she)備(bei)及(ji)自動控(kong)制設(she)備(bei)的(de)標(biao)  準化、小型(xing)化。同時互(hu)感(gan)(gan)(gan)器(qi)(qi)還可(ke)用(yong)來隔開高電(dian)(dian)(dian)壓(ya)(ya)(ya)系(xi)統(tong)，以保(bao)證人身和設(she)備(bei)的(de)安全(quan)。