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Understanding Dissolved Gas Analysis (DGA)
Dissolved Gas Analysis (DGA) is one of the most effective diagnostic tools for evaluating transformer health. It detects gases dissolved in insulating oil, providing early warning signs of developing faults.
What Is DGA?
As electrical or thermal faults occur inside a transformer, they generate gases such as hydrogen, methane, ethylene, and acetylene. Measuring these gases allows experts to identify the type and severity of internal problems.
Common Gases and Their Meaning
|
Gas |
Possible Indication |
|---|---|
|
Hydrogen |
Partial discharge |
|
Methane |
Low-temperature overheating |
|
Ethylene |
High-temperature overheating |
|
Acetylene |
Arcing |
|
Carbon Monoxide |
Paper insulation deterioration |
Why Early Detection Matters
Early diagnosis allows maintenance teams to schedule repairs before a fault becomes critical, helping avoid expensive failures and improving equipment reliability.
