What is the difference between a dry type and oil cooled transformer?

Is was classified by cooling type such as (air cooled, oil filled, fan cooled, water cooled, etc)


Dry type TR is Small signal transformers do not generate significant amounts of heat. Power transformers rated up to a few kilowatts rely on natural convective air cooling.





Oil cooled TR is handling higher power, or having a high duty or high volvtages and generate high heat. In order to cool the transformer, we use oil as the coolant.this type of TR is immersed in transformer oil 鈥?you can see http://en.wikipedia.org/wiki/Transformer鈥?/a> Have fun and good luckWhat is the difference between a dry type and oil cooled transformer?
In dry type transformer, transformer windings are cooled by natural air . In oil cooled transformer , windings are submerged in oil and heated oil is cooled in the radiator.