JBK3系列机床控制变压器是引进德国西门子公司样机制造的新产品，符合VDE0550、IEC204-1、IEC439、GB5226-85等有关国际、国家标准。 JBK3系列机床控制变压器适用于交流50-60HZ、输入额定电压不超过500V，输出额定电压不超过220V的电路中，作为机床、机械设备及一般电器的控制电源和工作照明、信号灯的电源之用。 The JBK Series Machine control transformer is a new product to consults German Sienebs Company kind mechanism build,matching the VDE0550,relevant nations stanional in IEC204-1,IWC439,JB/T5555,etc,of GB5226. The JBK Series Machine control transformer is applicable to exchanges 50-60Hzs,output The sum settle the electric voltage not over 220 Vs,input The sum settles the electric voltage not Over a machine for being used as every trade equipments,the control power supply of the general electric appliances illuminates with the work ,letter The power supply of the fash singnal it use