What is Dissolved Gas Analysis (DGA) ?

What is Dissolved Gas Analysis (DGA) ?

Dissolved Gas Analysis (DGA) Definition

Dissolved gas analysis of transformer oil is a technique to study gases produced under thermal and electrical stress in transformers.

Gas Extraction Methods

Using specialized equipment, gases are extracted and analyzed to diagnose the internal condition of a transformer.

Indicative Gases

Certain gases like hydrogen, methane, and ethylene signify specific types of thermal stresses based on their amounts and presence.

CO and CO2 Levels

The levels of carbon monoxide and carbon dioxide can reveal the degradation of transformer insulation.

Furan Analysis Importance

This method is critical for assessing the condition of paper insulation and estimating the remaining life of a transformer.