Dissolved Gas Analysis (DGA)
Testing Standard: IS 10593 / IEC 60567
Dissolved Gas Analysis (DGA) is one of the most important diagnostic tools for detecting internal faults in oil-filled transformers. By analyzing the type and quantity of gases dissolved in transformer oil, we can identify incipient faults such as overheating, arcing, partial discharge, and corona before they cause catastrophic failures.
DGA helps plan maintenance actions and avoid costly unplanned outages. It is widely recognized as the single most important test for evaluating transformer health.
Key Features
- Hydrogen (H2) Detection
- Methane (CH4) Analysis
- Ethylene (C2H4) Measurement
- Acetylene (C2H2) Detection
- Key Gas Ratio Analysis
- Duval Triangle Interpretation
Why This Test Matters
When internal faults occur — such as overheating, arcing, or partial discharge — specific gases are generated and dissolved into the transformer oil. By analyzing these gases, we can detect problems months before they become critical, allowing planned maintenance instead of emergency repairs.