Interview Question

Electrical Maintenance Engineer Interview


Simhapuri Energy

why in transformer oil is used?

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3 Answers


In order to insulate and to provide cooling to the windings we use transformer oil. Transformer oil has very high breakdown voltage so that it does not breakdown inspite of having high voltage coils around it. When transformer works on high load its winding temperature increases hence oil temperature also increases which then cooled through the cooling tubes having contact with outside air.

Himanshu on


Cooling purpose , transformer oil is insulation oil also

Anonymous on


Called as also insulation oil and this is stable at high temperatures.

Anonymous on

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