DGA (Dissolved Gas Analysis) can literally be interpreted as an analysis of transformer conditions which is based on the amount of gas dissolved in transformer oil. DGA in the industrial world is also known as a blood test or blood test on the transformer. Human blood is a compound that is easy to dissolve other substances that are around it. Through testing dissolved substances in the blood, it will be obtained related information about human health. Likewise with the transformer, testing dissolved substances (usually gas) in transformer oil (transformer oil is analogous to human blood) will provide information related to the health and overall quality of the transformer's work.