The iron core of this type of transformer is ring wound with cold rolled oriented silicon steel sheets, the secondary winding is evenly wound along the ring core, and the middle window is used for busbar winding; there is a base at the lower part for fixation and installation. The exterior of this type of transformer is insulated and poured with unsaturated resin. This transformer has advantages of evenly wound secondary winding, very small magnetic flux leakage, stable performance and easy installation.
