What is the procedure for d g a transformer oil testing and what parameters are evaluated?

The procedure for dissolved gas analysis (DGA) in transformer oil testing involves collecting a sample of the oil, typically using a gas-tight syringe, and analyzing it for dissolved gases. Key parameters evaluated include the concentrations of gases such as hydrogen, methane, ethylene, acetylene, carbon monoxide, and carbon dioxide. These gases indicate potential issues like overheating or arcing within the transformer. The results are then interpreted using established diagnostic methods to assess the transformer’s condition.