What is the procedure for DGA testing of transformer oil?

The procedure for Dissolved Gas Analysis (DGA) testing of transformer oil involves several key steps. First, collect a representative oil sample from the transformer, ensuring minimal air exposure. Next, use a gas chromatograph to analyze the dissolved gases, focusing on key indicators like hydrogen, methane, ethane, and acetylene. Interpret the results using established guidelines to assess the transformer’s condition and identify potential faults. Regular DGA testing is crucial for proactive maintenance and reliability.