What are the requirements specified in transformer oil specification?

Transformer oil specifications typically require high dielectric strength, low viscosity, and excellent thermal stability. Key parameters include a minimum dielectric breakdown voltage of 30 kV, a flash point above 140°C, and a pour point below -30°C. Additionally, the oil must have low acidity and moisture content to prevent corrosion and ensure optimal insulation performance. These requirements ensure the reliability and efficiency of power transformers in operation.