What are the technical considerations for transformer dielectric oil?

When selecting transformer dielectric oil, key technical considerations include its dielectric strength, thermal conductivity, viscosity, and oxidation stability. The oil must have a high dielectric strength to prevent electrical breakdown, while good thermal conductivity ensures efficient heat dissipation. Low viscosity is essential for effective circulation within the transformer, and oxidation stability prolongs the oil’s lifespan, reducing the risk of sludge formation and maintaining performance over time. Regular testing for these properties is crucial for transformer reliability.