JBK3系列机床控制变压器适用于交流50～60Hz,输入电压不超过660V的电路中，作为各类机床、机械设备等一般电器的控制电源、局部照明及指示灯的电源。
变压器按JB/T5555及相关标准设计、制造与检验。JBK3-40VA JBK3-63VA JBK3-100VA JBK3-160VA JBK3-250VA JBK3-400VA JBK3-500VA JBK3-630VA JBK3-800VA JBK3-1000VA JBK3-1600VA JBK3-2500VA JBK5-40VA JBK5-63VA JBK5-100VA JBK5-160VA JBK5-250VA JBK5-400VA JBK5-630VA JBK5-800VA JBK5-1000VA JBK5-1600VA JBK5-2500VA JBK5-3000VA JBK5-4000VA JBK5-5000VA JBK5-6000VA JBK5-7000VA JBK5-8000VA JBK5-10000VA JBK6-40VA JBK6-63VA JBK6-100VA JBK6-160VA JBK6-250VA JBK6-400VA JBK6-630VA JBK6-800VA JBK6-1000VA JBK6-1600VA JBK6-2500VA JSG-160VA JSG-250VA JSG-400VA JSG-630VA JSG-1000VA JSG-1600VA JSG-2500VA JSG-4000VA JSG-6300VA JSG-8000VA JSG-10000VA