Products for oil-immersed distribution transformers transformer mining industry and civil important equipment for power distribution systems, it will be 10 (6) kV or 35kV network voltage drops below 230 / 400V bus voltage users. Such products applicable to the exchange 50 (60) Hz, three-phase maximum rated capacity 2500kVA (single-phase maximum rated capacity 833kVA, generally do not recommend the use of single-phase transformers) may, within households (outside) the use, capacity and below 315kVA can be mounted on the rod, the ambient temperature is not higher than 40 ℃, not lower than -25 ℃, the highest daily average temperature of 30 ℃, the highest annual average temperature of 20 ℃, relative humidity less than 90% (ambient temperature of 25 ℃), Altitude not more than 1000m. If inconsistent with the above conditions, according to relevant provisions of GB6450-86, and make appropriate adjustments quota. Interpretation Model Features 1, no conservator height lower than similar products. 2, sealed transformers and transformer conservator with the body of exactly the same, so you can correspond to different models of transformers designed for users to choose. 3, when the transformer sealed vacuum oiling process to completely remove the moisture in the transformer. After sealing the transformer oil is not in contact with air, oxygen and moisture effectively prevent immersed transformer insulation performance degradation caused (insulation and oil aging), and therefore do not have regular oil sample test. 4, high and low voltage wire fastening portion transformers, etc. have brought the body of the self-locking locknut, took no hanging core structure, the body of the tank closely together to be able to withstand transportation vibration and bumps. 5, the tank has a ripple tank and tank expansive choice of two forms of the radiator, radiator corrugated sheet and expansion not only has a cooling function but also has a "breathing" function, corrugated sheet radiator and expansion flexibility to compensate for temperature oil volume changes caused by the change. 6, sealed form: divided welded with detachable two choices. Welding - box along with the cover after passing all the tests welded shut. Demountable - sealed with tape and screw fastening sealed box along with the cover. 7, the lid is equipped with high-voltage bushing oil level is higher than the fuel gauge rod or rod-shaped filler plug. 8, the maintenance costs of only 20% of the general type in the normal lifetime without an oil change and improve the power grid safety and reliability. 9, the protection device: ▲ pressure release valve - when the transformer overload or malfunction caused the tank internal pressure reaches 35kPa, pressure release valve and it operates reliably release the pressure, and when the pressure is reduced to normal time and restitution, to ensure that the transformer run. ▲ Temperature -30 ~ 800kVA transformer device on the lid with a thermometer seat straight. 1000kVA and above transformer equipped with signal thermometer. Transformer top oil temperature measured by a thermometer.