Full sealed transformer main feature is the effective measures, so that the transformer oil and air and sunlight completely isolated, avoid the transformer oil oxidation and moisture, in order to reduce the transformer insulation aging, reduce the transformer maintenance and repair, prolong the service life of transformer.
Full sealed transformer is the key technology to solve the transformer oil caused by thermal expansion and contraction of volume change. Transformer in operation, can occur at about 100 DEG C temperature changes, the volume change of transformer oil can reach about 0.7%. Ordinary small and medium-sized oil immersed transformer installed with seal moisture absorber of the oil conservator, transformer through the moisture absorber is communicated with the atmosphere, but the moisture absorber within the silica gel hygroscopic action is limited, the atmosphere in the humid air will enter into the transformer oil, lead to transformer oil aging, insulation strength. So users need frequent replacement of silica gel and treatment of transformer oil, need to spend a lot of energy to regular maintenance and maintenance transformer.
Full sealed transformer adopts a corrugated tank, using corrugated wall in certain pressure range of elastic deformation, with the change of pressure ripple oil tank volume can be changed, to accommodate the expansion of transformer oil, transformer oil expansion problem solved. In this way, transformer oil and completely isolated from the air is not easy to aging, prolonging the service life of the transformer, while greatly reducing the transformer maintenance work.