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Dry-type transformers are usually
air cooled with winding insulation
of class A, B, C, or H.
Liquid-type Transformer windings
and core are totally immersed in a
liquid contained in the transformer
tank.
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Dry-Type Transformer
Self-cooled
Force air cooled
Liquid-TypeTransformer
Force air cooled
Self-cooled
Forced air cooledand forced oil cooled
Water cooled
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Thank you!