What are the requirements specified in transformer oil specifications?

Transformer oil specifications typically require high dielectric strength, low viscosity, and excellent thermal stability. Key parameters include a minimum dielectric strength of 30 kV, a flash point above 140°C, and a pour point below -30°C. Additionally, the oil must have low acidity, minimal water content (less than 50 ppm), and good oxidation stability to ensure effective insulation and cooling of the transformer while preventing degradation over time.