What kind of maintenance is applicable to transformers with metal caps?

Regular inspections for corrosion are a vital aspect of maintenance for transformers with metal caps. Metal components are susceptible to corrosion due to environmental factors such as moisture and pollutants. Over time, this corrosion can compromise the transformer's structural integrity and performance. Conducting regular inspections allows technicians to identify and address any corrosion issues before they lead to more serious problems, such as leaks or electrical failure.

The other maintenance practices listed may not be directly relevant to the primary concerns associated with transformers that have metal components. For example, seasonal voltage adjustments are more applicable to the operational protocols of the transformer rather than its physical integrity. Similarly, while tap changers need to be evaluated, the term "strict" may imply a level of scrutiny that isn't standard for all transformers. Periodic painting, while beneficial for aesthetics and providing a protective layer, may not address underlying issues like corrosion that could affect the transformer's functionality. Thus, regular inspections for corrosion are essential to ensure the longevity and safe operation of transformers.