Oil-immersed transformer

The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. Its three-dimensional wound iron core has a three-dimensional arrangement of equilateral triangles. There is no air gap in the magnetic circuit and the winding is tighter. , the three magnetic circuits have the same length and are the shortest. The cross-sectional area of the core leg is closer to a circle, so the performance is further improved, the loss is reduced, the noise is reduced, the three terms are balanced , and the third harmonic component is reduced. This product is more It is suitable for the transformation of power grids in urban and rural areas, industrial and mining enterprises, and is more suitable for combined transformers and transformers for prefabricated substations.

Oil-immersed transformers, also known as oil-filled transformers, are a type of power transformer that utilizes oil as both a cooling and insulating medium. These transformers are submerged in a tank filled with oil, which provides efficient cooling capabilities and electrical insulation. The use of oil as a cooling medium allows for better heat dissipation compared to air-cooled transformers, enabling higher power ratings and increased efficiency.

Structure and Components

An oil-immersed transformer consists of several key components:

• Core and Windings: The core is typically made of stacked silicon steel sheets that provide a path for the magnetic field. The windings are insulated coils that carry the electrical current. In oil-immersed transformers, the core and windings are submerged in oil to ensure effective cooling and insulation.

• Transformer Oil: The oil used in these transformers is specifically designed to have high dielectric strength and thermal conductivity. It serves to cool the transformer by absorbing the heat generated by the windings and core through convection and radiation.

• Tank: The transformer is housed within a tank that is filled with oil. The tank is designed to be robust and sealed to contain the oil and provide physical protection to the internal components.

• Bushings: High voltage and low voltage bushings transmit the electrical energy from the transformer to its next destination. They are made of insulating materials to prevent electrical leakage.

• Breather: A breather system allows the oil to expand and contract with temperature changes without coming into contact with the atmosphere, which would risk contamination.

• Oil Conservator (Pillow): This is a separate tank that helps maintain the oil level and quality by providing a reservoir for oil expansion and contraction.

• Pressure Relief Device: This is a safety feature designed to release pressure in the event of an internal fault that could cause a rapid increase in pressure.

• Cooling System: Oil-immersed transformers may have radiators or cooling fins to dissipate heat more effectively.

• Tap Changer: This allows for the adjustment of the transformer's output voltage under different load conditions.