Correct Answer - Option 2 : Insulate the core
Transformer oil:
- Transformer oil works in two ways first it is insulation in electrical power transformer and second, it dissipates the heat of the transformer i.e. acts as a coolant
- Transformer oil is normally obtained by fractional distillation and subsequent treatment of crude petroleum
- It prevents corrosion of the internal components and tank
Characteristics of transformer oil:
1) High dielectric breakdown
2) Low viscosity
3) Free from moisture
4) Low pour point
5) Low flashpoint
