What are the technical considerations for oil is used in transformer?

When selecting oil for transformers, key technical considerations include 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 is crucial to prolong the oil’s lifespan and prevent sludge formation. Additionally, environmental impact and regulatory compliance are important factors in oil selection.