How should a transformer oil analysis report be interpreted?

A transformer oil analysis report should be interpreted by examining key parameters such as dissolved gas analysis (DGA), moisture content, acidity, and furan analysis. Elevated levels of gases like hydrogen or ethylene may indicate insulation breakdown or overheating. Moisture content should ideally be below 30 ppm to prevent degradation. Acidity levels above 0.1 mg KOH/g suggest oil degradation. Furan analysis helps assess paper insulation condition. Each parameter provides insights into the transformer’s health and potential maintenance needs.