What is the viscosity grade of transformer oil used in power transformers?

The viscosity grade of transformer oil used in power transformers typically falls within the range of 10 to 30 centistokes (cSt) at 40�C. This viscosity grade ensures optimal flow characteristics, allowing for effective heat dissipation and electrical insulation. The specific viscosity grade may vary based on manufacturer specifications and operational requirements, but maintaining the appropriate viscosity is crucial for the performance and longevity of power transformers.