SG/X series three-phase box transformer is a three-coherent external transformer designed by Jinbao Power source for import and export machine tool equipment manufacturers, because machine tool equipment has import and export trade for every country. But the current import and export equipment for China, Japan, Switzerland, Germany and the United States and other countries, each country's voltage standards are not the same, the supporting program is not the same, Jinbao power supply in the field of export trade has many years of supporting experience, Summed up the voltage and frequency standards of each country, the difference between strong and weak electricity, the professional design of equipment use, safety precautions, and the rich experience of customers' on-site use environment, and then developed a professional transformer product, providing a worry-free power solution for import and export equipment traders.