What are the dissolved gases in transformer oil?

Dissolved gases in transformer oil primarily include hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide. These gases are produced during the thermal and electrical degradation of the oil and insulation materials. Monitoring the concentration of these dissolved gases is crucial for assessing the condition of the transformer and identifying potential faults, as certain gas ratios can indicate specific types of issues within the power transformer.