What are the requirements specified in specification of transformer oil?

The requirements specified in the transformer oil specification include high dielectric strength, low viscosity, and excellent thermal stability. Additionally, the oil must have low water content, minimal acidity, and good oxidation resistance to prevent degradation. The flash point should be above 140°C, and the pour point must be low enough to ensure fluidity at low temperatures. These properties ensure optimal performance and longevity of power transformers.