Maintenance
DGA Interpretation Guide
By Ziyao Engineering Team2026-04-1812 min
DGA Interpretation Guide
Dissolved Gas Analysis (DGA) is the primary diagnostic tool for oil-immersed transformers. This guide covers interpretation methods per IEC 60599.
Key Methods
- Duval Triangle: Plots CH₄, C₂H₄, C₂H₂ to identify fault type
- Rogers Ratio: Uses CH₄/H₂, C₂H₂/C₂H₄, C₂H₄/C₂H₆ ratios
- Key Gases: H₂ (partial discharge), C₂H₂ (arcing), CO (paper aging)
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