The buried transformer is a kind of transformer that combines the transformer and corresponding auxiliary equipment, is installed under the outdoor reference plane without direct contact with the public, and can be immersed in water for operation within a certain period of time., It is suitable for urban environment (installed in basements or basements), especially for densely populated central cities. The structure of buried transformers and low-voltage billboards conforms to the urban ecological design concept and beautifies the environment. Due to its small floor area, convenient installation and maintenance free features, it is mostly used in urban public power distribution, parking lot, elevated, airport, port, tunnel, tourist attractions and other places where land is tight, urban power distribution transformation and places with strict requirements on floor area and height. The product structure is fully sealed, and the shell is made of corrosion-resistant stainless steel, so that it has high corrosion resistance and waterproof performance, and the protection grade is IP68. The utility model can be installed in the pit with bad urban drainage environment. Even if it is immersed in water, it can operate as usual, greatly expanding the use range of users. 1. s11 The buried transformer can be installed flexibly, and can be directly buried underground. The power supply control equipment occupies less area, and the upper ground can be green and beautify the environment. 2. The capacity is small and the points are densely distributed. In large urban buildings, the first floor has one change or the first floor is changeable. In case of failure of individual equipment, the impact of power outage maintenance is small; In rural power supply, small capacity buried power transformer is directly buried under the pole, with several households having one transformer, reducing line loss and theft accidents, and effectively improving the reliability of power supply. 3. The international advanced manufacturing technology is adopted, and the noise is low even if the machine is operated at full load, which conforms to the environmental protection standards of China. With "environmental protection", it has built a modern urban block without visual pollution and environmental pollution, beautifying the urban environment. At present, in urban reconstruction and construction, new rural construction and housing development, the power department is required to reduce the area of power supply equipment as much as possible without affecting the landscape effect of urban construction when setting power supply equipment. 4. s11 Buried transformer can replace the original roadside distribution transformer station for power supply in urban scattered power supply. This makes both sides of urban roads clean, beautiful, safe and reliable, reduces power failure accidents caused by rainy and snowy days, and reduces maintenance.Main functions and characteristics of S11-M.RD series buried transformers 1. Two way (one in and one out) three-phase plug-in high-voltage cable connector is used for high-voltage incoming line; 2. The low-voltage outgoing line adopts three-phase plug-in low-voltage cable connector. 3. The high-voltage side is equipped with current limiting fuse protection; 4. The tank body is made of stainless steel. 5. The protection level is IP68. All water can be immersed in water for a period of time. 6. The temperature rise limit for operation in the pit shall comply with the provisions of GB1094.2-1996. Description of S11-M.RD series buried transformer: 1. The cover plate is 4mm steel plate, and the hinge is 10mm round steel. 2. The second is that there are bricks on all sides, and the internal surface is coated with cement mortar. 3. The reinforced concrete shall be used for on-site pouring after surrounding. 4. The shaft clearance size shall ensure that the length of the embedded transformer is+200, the width is+200, and the height is+600mm.