Answer Posted / parag

Function of the cooling tubes is basically to maintain the
working tempareture of the transformer. it's basically used
to dissipate heat.there are 2 types of cooling
1.natural cooling
2.forced cooling
Natural Cooling occurs when the transformer oil flows
through the 'fins'of the transformer.the oil comes into
contact with atmospheric temapareture which is less than
that of the oil and the transformer oil gets cooled.
Forced Cooling is done by the fans provided outside the
transformer to act as coolant.

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