BX8雙(shuang)管滑(hua)線滑(hua)動變阻(zu)器(qi)適(shi)用(yong)(yong)于交流(liu)50HZ，380V以下，直流(liu)440V以下的(de)電(dian)(dian)(dian)(dian)路中，在電(dian)(dian)(dian)(dian)氣機械設(she)計階段中作變更電(dian)(dian)(dian)(dian)流(liu)，電(dian)(dian)(dian)(dian)壓和作為代替未定電(dian)(dian)(dian)(dian)阻(zu)值的(de)可(ke)變電(dian)(dian)(dian)(dian)阻(zu)器(qi)應用(yong)(yong)。在實驗室(shi)中作研究(jiu)試驗或教(jiao)學演示用(yong)(yong)的(de)電(dian)(dian)(dian)(dian)流(liu)、電(dian)(dian)(dian)(dian)壓調(diao)節(jie)器(qi)，以及(ji)作為發(fa)電(dian)(dian)(dian)(dian)設(she)備和直流(liu)電(dian)(dian)(dian)(dian)動機的(de)勵磁、調(diao)速電(dian)(dian)(dian)(dian)阻(zu)等之用(yong)(yong)