What is the DGA test of transformer oil?

The DGA test of transformer oil, or Dissolved Gas Analysis, is a critical diagnostic tool used to assess the condition of transformer oil and the health of transformers. It involves sampling the oil and analyzing the dissolved gases within it, which are produced as a result of insulation breakdown, overheating, or other malfunctioning processes in transformers. By identifying the types and concentrations of gases such as hydrogen, methane, ethylene, and acetylene, the DGA test provides valuable insights into potential issues like arcing, thermal faults, or insulation degradation. Regular DGA testing is essential for preventative maintenance and helps to enhance the reliability and longevity of transformers, ensuring optimal performance in electrical systems.