What is transformer oil?

[LeonardoFitz]

Transformer oil is a petroleum product, specifically a fractionation product of petroleum. Its main components are compounds such as alkanes, cycloalkane saturated hydrocarbons, and aromatic unsaturated hydrocarbons. Commonly known as "Fangpeng oil," it appears as a light yellow transparent liquid. Detailed explanation: Transformer oil is a mineral oil obtained through the distillation and refining of natural petroleum. It is a mixture of pure, stable, low-viscosity hydrocarbon compounds with excellent insulation and cooling properties, derived from the lubricating oil fraction of petroleum after acid-base refining treatment. Functions: During operation, it primarily serves to dissipate heat and provide cooling. It also acts as an insulating and maintenance agent for windings and other components. Additionally, at high-voltage lead wires and tap switch contact points, it functions to suppress arcs, preventing the occurrence of corona and arc discharge.