What does BS 148 specify for transformer oil?

BS 148 specifies the requirements for mineral insulating oils used in transformers, focusing on their physical and chemical properties. It outlines standards for parameters such as viscosity, flash point, acidity, and dielectric strength, ensuring the oil’s effectiveness in insulating and cooling transformer components. Compliance with BS 148 ensures reliable operation and longevity of power transformers by maintaining optimal performance under various operating conditions.