Features: 1) Kind of steel tank oil-immersed type of current transformer providing current and electric energy measuring and relay protection to system with the frequency of 50Hz 2) The transformer is made of single phase oil immersed type self cooling type, which can be used indoor or outdoor. There are insulation and oil for cool down the transformer installed inside the transformer 3) Adopts vacuum oil filter and vacuum oiling arts 4) The distance between class 10kV fuel and cover is about 15mm, there is an oiling value installed above the cover, (there is an air hole on the value) with water-proof and snow-proof cover 5) There is an oil tank inside the class 35kV tube, the diaphragm inside the oil tank can make the oil be separated from the air, which decreases the oil oxidizing speed 6) Transformer thermal stability is 75 times and dynamic stability is 187.5 times 7) The product has four models: single-ratio single secondary, single ratio double secondary, double ratio single secondary and double ratio double secondary