JBK-3000VA機床(chuang)控(kong)制(zhi)變(bian)(bian)壓器(qi)(qi),BK、BKC等(deng)系列控(kong)制(zhi)變(bian)(bian)壓器(qi)(qi)(以(yi)下簡稱變(bian)(bian)壓器(qi)(qi)),適(shi)用于(yu)交流50Hz~60Hz,電(dian)壓至500V的電(dian)路中(zhong),在工礦企(qi)業(ye)中(zhong)用于(yu)局(ju)部照明(ming)的電(dian)源,在電(dian)氣設(she)備中(zhong),用于(yu)控(kong)制(zhi)電(dian)路的電(dian)源,以(yi)及(ji)信號燈和指示燈的電(dian)源。