Answer Posted / pundlik wanwe

Transformer properties are governed by the 2 Indian
Standards.1) IS 335 & 2)IS :1866
IS 335 is for new oil
IS 1866 is for oil in service
For the transformer in service as long as oil in
transformer is ok as per IS 1866 there is no requirment as
such for filteration of oil, but you have to follow the
manufactuer's instructions regarding this

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8. A DYNAMOMETER TYPE WATTMETER RESPONDS TO THE.......

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