What is one potential benefit of a hermetically sealed transformer?

A hermetically sealed transformer offers the significant benefit of protection against environmental factors. By being hermetically sealed, the transformer is insulated from moisture, dust, and pollutants that could degrade its performance and reliability over time. This sealing helps to maintain the integrity of the insulating oil and the internal components of the transformer, significantly reducing the risk of contamination and corrosion, which can lead to failures or reduced service life.

While there may be other benefits associated with hermetically sealed transformers, such as potentially reduced maintenance needs and improved longevity due to fewer environmental stresses, the primary and most recognized advantage is the degree of protection it offers from external environmental influences. This enhanced durability is particularly crucial for transformers located in harsh environments or outdoor applications where exposure to the elements is unavoidable.