What are the differences between dry-type transformers and oil-immersed transformers, and in which applications is each type more suitable?
2025-10-17
Dry-type transformers and oil-immersed transformers differ significantly in several aspects, and these differences determine their respective application scenarios. Dry-type transformers use air or other gases as cooling and insulating media, eliminating the need for transformer oil. As a result, they feature environmental friendliness, ease of maintenance, and excellent fire resistance. They are typically suitable for locations with high requirements for fire and explosion protection, such as high-rise buildings, subways, tunnels, and hospitals. In contrast, oil-immersed transformers use transformer oil as both the cooling and insulating medium. They offer advantages such as superior heat dissipation, strong overload capacity, and relatively lower costs. They are more appropriate for environments where equipment costs are a key consideration and where fire safety requirements are not particularly stringent—such as industrial parks, large-scale factories, and rural power grids. When selecting a transformer, it is essential to take into account comprehensively factors including the operating environment, safety requirements, and economic costs, ensuring that the most suitable transformer type is chosen to guarantee the stable operation of the power system and efficient power supply.
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2025-11-11
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