Oil-immersed transformer is a new type of high-performance transformer with more reasonable structure and better performance. Its three-dimensional winding iron core has no air gap in its magnetic circuit because its three core columns are arranged in an equilateral triangle, and the winding is more compact. The three magnetic circuits are the same length and the shortest. The cross-sectional area of the core column is closer to the circle, so the performance is further improved, the loss is reduced, the noise is reduced, the three balance, and the third harmonic component is reduced, This product is more suitable for urban and rural, industrial and mining enterprise power grid transformation, and is more suitable for combined transformer and pre-installed transformer substation.
Oil-immersed transformers use oil as the main insulation means of transformers and rely on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air-cooling, oil-immersed water-cooling and forced oil circulation. The main components of transformer include iron core, winding, oil tank, conservator, respirator, explosion-proof pipe (pressure relief valve), radiator, insulating sleeve, tap changer, gas relay, thermometer, oil purifier, etc.
The oil-immersed transformer has low noise due to the fact that the oil can seep into the silicon steel layer of the transformer for a long time, and the transformer oil has elasticity to play a buffer role. However, the pressure regulating switch is inside the oil tank, and the switch contact is not good enough to be seen from the outside. If the contact is not good enough, the circuit is open. If the contact is poor, the switch is easy to burn when the load is too large.
