What are the viscosity requirements for transformer oil?

The viscosity requirements for transformer oil are critical for ensuring efficient heat transfer and proper operation of the transformer. Typically, transformer oil should have a viscosity of 10 to 30 centistokes (cSt) at 40°C. This range allows for optimal flow characteristics, minimizing resistance during circulation and ensuring effective cooling. Additionally, the viscosity should remain stable across a wide temperature range to maintain performance under varying operational conditions.