What is the procedure for frequency of transformer oil testing and what parameters are evaluated?

The procedure for frequency of transformer oil testing typically involves annual assessments, although more frequent testing may be required for aging transformers or those in critical applications. Key parameters evaluated include dielectric strength, moisture content, acidity, dissolved gas analysis (DGA), and furan analysis. These tests help assess the insulation properties, detect potential failures, and ensure the transformer operates efficiently and safely. Regular monitoring is essential for maintaining transformer reliability and longevity.