What are the technical considerations for electrical transformers oil?

When selecting oil for electrical transformers, key technical considerations include dielectric strength, thermal conductivity, viscosity, and oxidation stability. The oil must have high dielectric strength to prevent electrical breakdown, adequate thermal conductivity for efficient heat dissipation, and low viscosity for optimal circulation. Additionally, oxidation stability is crucial to prolong the oil’s lifespan and prevent sludge formation, which can impair transformer performance. Regular testing and monitoring of these properties are essential for maintaining transformer reliability.