What are the specifications for transformer oil in India?

The specifications for transformer oil in India are outlined in IS 335:2018, which includes parameters such as dielectric strength, viscosity, flash point, and acidity. Transformer oil must have a minimum dielectric strength of 30 kV, a flash point above 140�C, and low water content to ensure effective insulation and cooling in power transformers. Additionally, the oil should be free from impurities and have a low level of acidity to maintain performance and longevity.