Answer / bishnu das

first function of the bushing is to connect the winding to
the line with an insulation sorrounding the transformer.and
one lightening arrester also present in the bushing to
protect the tranformer winding.

Answer / satheesh

bushing is to separate the winding( line ) form the earth (transformer ground) hence to avoid the short circuit.according to the field analysis the bushing are made otherwise it leads to breakdown due to electrical stress applied

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