What are the technical aspects of transformer oil color?

The technical aspects of transformer oil color primarily indicate its condition and quality. Clear, light-colored oil typically signifies good quality and low levels of contaminants. Darker colors, such as brown or black, may indicate oxidation, thermal degradation, or the presence of particulate matter. Regular color analysis, alongside other tests, helps assess the oil’s dielectric strength and overall health of the transformer, ensuring optimal performance and longevity.