3300kV class power transformer, in the material, process, structure has adopted a series of major reforms, with small size, light weight, high efficiency, low loss, low noise, reliable operation characteristics, can reduce a lot of power grid loss and operating costs, significant economic benefits. Suitable for power plants, substations, large factories and mining enterprises, etc. This product meets the national standards: GB1094.1-2013 “Power Transformer Part 1 General”, GB1094.2-2013 “Power Transformer Part 2 Temperature Rise”, GB1094.3-2003 “Power Transformer Part 3 Insulation Level, Insulation Test and External Insulation Air Gap”, GB1094.5-2003 “Power Transformer Part 5 Ability to withstand short circuit”, GB/T6451-2015 “Three-phase oil-diffuse power transformer technical parameters and requirements”.