Photovoltaic power generation as a kind of clean energy production mode, at home and abroad has been rapid development, ZGS□-40.5 series wind energy / photovoltaic box-type substation is precisely to meet the growing photovoltaic power generation power supply requirements, our company produces 10kV, 35kV combined transformer based on the digesting and absorbing domestic and foreign advanced technology combined with the domestic demand for self-development of a series of products, the product is a transformer, load switch, high voltage fuse installed in the transformer box, using the transformer's insulating liquid as the insulation and heat dissipation medium, using a fully sealed structure, the shell is split, shot blasting, acidification, the whole product insulation and cooling medium. Transformer, load switch, high-voltage fuse installed in the transformer box, the use of transformer insulation liquid as the insulation and heat dissipation medium of the entire product, the use of fully sealed structure, the shell using a split, shot blasting, pickling, phosphatization, respectively, spraying primer, intermediate paint, paint to achieve the surface of the anticorrosive properties, resistance to thick, ultraviolet radiation is more than the strength of the ordinary spraying, with a small size, light weight, easy to install. It has the advantages of small size, light weight, easy installation, etc.