By constantly summing up experience and drawing reference from domestic and overseas advanced experience for 220kV power transformer produced by the company, 220kV products have formed standard structure. Types of its product have changed into the current type 18, type 20 and type 22 products from the original type 9. It also launches such products as self-cooled, air-cooled maintenance-free structure. Our products are greeted with good praise among numerous users. Our company’s products have the characteristics of free hanging core, high reliability, low loss, low noise, low temperature, low partial discharge, etc. This series of products fully meets the market requirements of high power quality, low loss noise, and long maintenance intervals.