The role of transformer oil
1. The oil in the transformer mainly plays the role of heat dissipation and cooling during operation;
2. Insulation and insulation maintenance of windings, etc. (keep good insulation);
3. Transformer oil plays an arc-extinguishing role at the high-voltage lead wire and the contact point of the tap changer to prevent the generation of corona and arc discharge;
4. Transformer oil is widely used as liquid seal in hydraulic safety valve.