Three balance three sectiont ransformer

The present invention relates to a three phase transformer, specially to that three phase trasformer with the stereo structure of coiled iron core. Owing to that the consume of silicon steel sheet islarge for double E and Y shaped coiled iron core of three phase transformer and iron loss is large and there is 50Hz noise for involute shaped three phase trnasformer. The invented coiled iron core is composed of three sections of coiled iron core column with long and short yokes on top end and bottom end. The long and short yokes of the top end and bottom end of three sections of coiled iron core column are separately stagggeringly jointed each other. Said invention is suitable for power transmission and three phase power source.