Air Cooled Distribution Transformer

It Is Desirable That The Spaces Between The Coverings & The Turns Of The Electrical Winding Be Thoroughly Impregnated & Coated With The Varnish & The Varnish Coating Is Then Thoroughly Cured To Provide Optimum Insulating & Thermal Conducting Properties As Well As Being Imperviousness To Moisture & Sufficient Strength To Resist Fracture Of The Coating.