What are the oil requirements for power transformers?

The oil requirements for power transformers include using mineral oil that meets ASTM D3487 standards, ensuring it has high dielectric strength, low viscosity, and good thermal conductivity. The oil must also have low water content and be free from impurities to prevent electrical breakdown and enhance cooling efficiency. Additionally, regular testing for acidity, furan content, and dissolved gases is essential to maintain the oil’s performance and longevity in transformer operations.