What are the different types of transformer oils and their applications?

Transformer oils are primarily classified into mineral oils and synthetic oils. Mineral oils, derived from refining crude oil, are commonly used due to their excellent insulating properties and cost-effectiveness. They are suitable for standard power transformers. Synthetic oils, such as ester-based fluids, offer higher fire resistance and biodegradability, making them ideal for applications in environmentally sensitive areas. Additionally, natural esters are gaining popularity for their eco-friendly attributes and enhanced thermal performance in transformers.