What is an oil immersed transformer?
Writer： Hengfeng you electric Time：2023-04-18 views：times
What is an oil immersed transformer?
Oil immersed transformer is a transformer with insulating oil as its insulation from the ground end of the shell. It is a liquid insulating medium. The role of insulating oil is insulation and insulation. The internal main support, iron core and winding of oil immersed transformer are immersed in insulating oil. So it's called "oil immersion".
As a kind of distribution transformer, oil immersed transformer is one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings. It reduces the 10kV or 35kV network voltage to the 230 / 400V bus voltage used by users. These products are applicable to AC 50 (60) Hz, maximum rated capacity of three phases 2500kVA (maximum rated capacity of single phase 833kva, single-phase transformer is generally not recommended). They can be used indoors (outside). When the capacity is 315KVA and below, they can be installed on the pole. The ambient temperature is not higher than 40 ℃, not lower than - 25 ℃, the maximum daily average temperature is 30 ℃, and the maximum annual average temperature is 20 ℃, The relative humidity shall not exceed 90% (ambient temperature 25 ℃), and the altitude shall not exceed 1000m. If it is inconsistent with the above service conditions, appropriate quota adjustment shall be made according to the relevant provisions of GB6450-86.
In the production of transformer oil, paraffin base oil is generally used to produce 10# oil, intermediate base oil No. 25, naphthenic base oil #25 and #45 transformer oil. With the development of modern technology, the insulating materials used in power system have also changed. The iron core and winding of this transformer are immersed in transformer oil and cannot work without oil (test can). The oil flow can take away the heat of iron core and coil, and the oil is insulated.
