What is the purpose of oil in the oil immersed transformer?
Time：2025-03-6 Auther：ZTelec-www.ztelectransformer.com
Oil-immersed transformers, a type of power equipment with insulating oil as the key medium, have the core task of smoothly converting high-voltage electric energy into applicable low-voltage electric energy and then meet the power consumption standards of various power equipment. Insulating oil plays a dual role inside the transformer: on the one hand, it ensures the stable operation of the transformer through circulating cooling; on the other hand, it also provides the necessary insulation protection to ensure the safety of the equipment.
1. Insulation of transformer oil
The oil inside the transformer has good insulation properties, which is determined by its high dielectric strength.
During the operation of the transformer, the oil can effectively prevent short circuits between components with different potentials, thereby ensuring the safe operation of the transformer.
In addition, transformer oil can also absorb and process partial discharges that may occur inside the equipment, further enhancing its insulation effect.
2. Cooling effect of transformer oil
In addition to its insulating function, transformer oil also undertakes the important task of cooling the equipment.
During the operation of the transformer, a large amount of heat will be generated inside the equipment due to the passage of current. Though circular flow, The transformer oil remove effectively to this heat and transfer it to the external cooling system, thereby ensuring that the temperature inside the transformer is always kept within a safe range.
This cooling effect is of great significance for preventing the transformer from being damaged due to overheating and extending the service life of the equipment.
Selection and maintenance of oil in oil-immersed transformers
Oil selection
The oil in oil-immersed transformers should have good insulation, thermal stability and anti-oxidation properties. Commonly used transformer oils are mineral oil and synthetic oil. Mineral oil is cheaper but has poor anti-oxidation properties; while synthetic oil has good anti-oxidation properties but is more expensive.
