The 5kV three-phase oil-immersed on-load voltage regulating power transformer has adopted a series of major reforms in materials, processes and structures. It has the characteristics of small size, light weight, high efficiency, low loss, low noise and reliable operation. It can reduce a lot of power grid losses and operating costs, and has significant economic benefits. It is suitable for power plants, substations, large factories and mines, etc. This product conforms to national standards: GB1094.1-2013 “Power Transformers Part 1 General Provisions”, 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 withstand short circuits”, GB/T6451-2015 “Three-phase oil-immersed power transformers Technical parameters and requirements”.