What is the gassing tendency of transformer oil?

The gassing tendency of transformer oil refers to its propensity to produce gases, primarily due to thermal degradation and electrical discharges within the transformer. This phenomenon is critical as it can indicate insulation breakdown or overheating. The presence of gases, such as hydrogen and methane, can be monitored through dissolved gas analysis (DGA) to assess the health of the transformer. High gassing levels may necessitate maintenance or replacement to prevent catastrophic failures.