Oil-immersed transformers use insulating oil as the cooling and insulating medium, with the iron core and windings all immersed in it. It achieves effective heat dissipation through oil circulation, featuring large capacity, high voltage grade, excellent heat dissipation performance, strong overload capacity, and stable and reliable operation. The insulating oil provides good electrical insulation and protects the internal structure. Widely used in the power transmission and distribution links of power systems, it is the core power transformation equipment for substations, industrial and mining enterprises and large buildings, ensuring the efficient and safe transmission and distribution of electric energy.