SFSZ11-240000/220kV class three-phase on-load voltage regulating and regulating power transformer, which has adopted a series of major reforms in materials, processes and structures, has the characteristics of small size, light weight, high efficiency, low loss, low noise and reliable operation, which can reduce a lot of power grid losses and operating costs, and has significant economic benefits. Suitable for power plants, substations, large factories and mining enterprises, etc. This product conforms to national standards: GB1094.1-2013 “General Provisions for Power Transformers Part 1”, GB1094.2-2013 “Power Transformers Part 2 Temperature Rise”, GB1094.3-2003 “Power Transformers Part 3 Insulation Level, Insulation Test and External Insulation Air Gap”, GB1094.5-2003 “Power Transformers Part 5 Ability to Bear Short Circuits”, GB/T6451-2015 “Transformer Technical Parameters and Requirements”.