220kV Three phase oil-immersed power transformer is designed according to IEC60076 and GB1094.1, . 2-1996GB1094.3, . 5-2003, the frequency is 50Hz, applicable to power transmission and transformation in industrial and agricultural power grid.

The iron core adopts whole-tilted non-porous structure with the quality grain-oriented cold-rolled electric steels, and optimized the core structure to get the low No-load loss and sound level; And based on the different capacity, the winding adopts the cylinder, spiral or continuous structure to reduce the additional losses; Using the entirely round insulating pressing plates to hold down the transformer body, the windings are assembled in a integrating manner to improve the products reliability; And to take effective measures on the technology to make sure the safe and reliable working