What is the dielectric strength of transformer oil?

The dielectric strength of transformer oil is a critical property that indicates its ability to resist electrical breakdown when subjected to high voltages. Typically measured in kilovolts per millimeter (kV/mm), the dielectric strength of transformer oil is usually around 30 to 50 kV/mm, although this can vary depending on the oil’s purity, quality, and presence of any contaminants. High dielectric strength is essential for maintaining the insulation properties of the transformer and ensuring reliable operation. Regular testing and maintenance of the oil are necessary to ensure optimal dielectric strength and overall performance in electrical applications.