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Oil-immersed transformer is a common type of electrical transformer for power distribution systems like grid, industrial, construction and mining enterprise, etc. It mainly used to change the network voltage into 230/400V(busbar voltage) to meet the residential users' requirements. Here are some key features of oil-immersed transformers:
Insulation and Cooling: The primary function of the oil in these transformers is to provide insulation between live parts and to dissipate heat generated during operation. The oil acts as a coolant, absorbing heat from the windings and transferring it to the transformer's radiators, where it is dissipated into the atmosphere.
Arc Quenching: In case of an internal fault, the oil can help suppress electric arcs, preventing extensive damage and enhancing safety.
Corrosion Protection: The oil creates a barrier, protecting the metal components of the transformer from corrosion and rust, thereby increasing its lifespan.
Noise Reduction: Oil-immersed transformers tend to operate more quietly compared to dry-type transformers because the oil dampens vibrations and noise produced by the magnetic flux.
Longevity: With proper maintenance, including regular oil testing and filtering, oil-immersed transformers can have a very long service life, sometimes exceeding 40 years.
Overall, oil-immersed transformers offer reliable, efficient, and cost-effective power transformation but require careful handling and maintenance to ensure optimal performance and safety. Qinghao Electric Oil immersed transformer can be divided into S11，S13 and S20 based on its performance, the voltage includes 6.6kv, 10kv, 11kv, 13.2kv, 13.8kv, 15kv, 22kv, 33kv, 35kv, and the capacity is from 15kva~31500kva.
