What is DGA testing and how is it used for transformer diagnostics?

Dissolved Gas Analysis (DGA) testing is a diagnostic technique used for transformer diagnostics by analyzing gases dissolved in transformer oil. It identifies the presence and concentration of specific gases, which are byproducts of insulation breakdown and overheating. By interpreting the DGA results, technicians can assess the condition of the transformer, detect potential faults, and predict failures, thereby enhancing maintenance strategies and ensuring reliable operation of power transformers.