Why use oil immersed transformer
Writer： Hengfeng you electric Time：2023-04-19 views：times
Oil immersed transformer is called insulating oil. Its function is to prevent breakdown. If the high-voltage end of the transformer is not insulated, corona or breakdown accidents will occur, causing losses to staff and equipment.
Transformers are not only oil immersed, and they do not have to be oil immersed. At present, oil immersed transformers are mainly used in conventional outdoor, high voltage, UHV and other fields; Dry type transformer is mainly used for indoor places with high fire prevention and safety requirements below 110KV; Gas insulated type, mainly used in special fields.
Because the oil immersed transformer is insulated by oil, the oil has good insulation performance and low price, so it belongs to the most conventional and common insulation structure in the transformer field.
(1) Insulation function: transformer oil has much higher insulation strength than air. When the insulating material is immersed in oil, it can not only improve the insulation strength, but also avoid the erosion of moisture. This is also the main function of transformer oil.
(2) Heat dissipation: the specific heat capacity of transformer oil is relatively large and is often used as coolant. The heat generated during the operation of the transformer causes the oil near the iron core and winding to expand and rise. Through the up and down convection of the oil, the heat is dissipated through the radiator to ensure the normal operation of the transformer.
(3) Arc suppression: on the on load voltage regulating switch of oil circuit breaker and transformer, arc will be generated during contact switching. Because the transformer oil has good thermal conductivity, and can contact a large amount of gas under the high temperature of the arc, resulting in large pressure, so as to improve the arc extinguishing performance of the medium and make the arc extinguish quickly.
