What are the requirements specified in transformer oil specification types?

Transformer oil specification types require several key parameters to ensure optimal performance and safety. These include a high dielectric strength (typically above 30 kV), low viscosity for effective cooling, a flash point above 140°C, and low water content (ideally below 50 ppm). Additionally, the oil should have excellent oxidation stability, low pour point, and minimal acidity to prevent corrosion and degradation of transformer components. Compliance with standards such as ASTM D3487 is essential for reliable operation.