BK-200VA控制(zhi)變壓器(qi),BK、BKC等系列控制(zhi)變壓器(qi)(以下(xia)簡(jian)稱變壓器(qi)),適用(yong)于(yu)(yu)交流50Hz~60Hz,電(dian)(dian)壓至500V的電(dian)(dian)路中(zhong),在工礦(kuang)企(qi)業中(zhong)用(yong)于(yu)(yu)局部(bu)照明的電(dian)(dian)源,在電(dian)(dian)氣設(she)備中(zhong),用(yong)于(yu)(yu)控制(zhi)電(dian)(dian)路的電(dian)(dian)源,以及信號燈和指示燈的電(dian)(dian)源。