What are the specifications for power transformer oil?

The specifications for power transformer oil include parameters such as dielectric strength, viscosity, flash point, pour point, and acidity. Dielectric strength should typically exceed 30 kV for effective insulation. Viscosity is crucial for cooling, ideally between 10 to 20 cSt at 40�C. The flash point should be above 140�C to ensure safety, while the pour point must be low enough to maintain fluidity in cold conditions. Acidity levels should be minimal to prevent corrosion.