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A dry-type transformer is a transformer whose core and windings are not immersed in insulating oil, but rather use solid insulating materials (such as epoxy resin, Nomex paper, air, etc.) as the main insulating and cooling medium. It stands in stark contrast to the traditional "oil-immersed transformer".
Oil-Immersed Transformers, Also Known As Oil-Cooled Transformers, Are The Most Widely Used And Technologically Mature Type Of Transformer In Power Systems. Their Core Feature Is That The Core And Windings Are Immersed In Insulating Oil, Relying On The Oil For Insulation, Heat Dissipation, And Fault Protection.
