The JBK1-4 series machine tool control transformer is suitable for circuits with an Ac frequency of 50-60Hz and an input voltagenot exceeding 660V. lt serves as the control power supply, local lighting, and indicator light for various types of machine toolsmechanical equipment, and other general electrical appliances.This series of transformers is an upgraded product of other controtransformers, manufactured using imported materials and advanced technology, it has the characteristics of reliable operation. lowenergy consumption, small size, safe wiring, and wide applicability.