Both of the above methods are being use to remove the Moisture, Sludge, Acidity and mainly to improve the BDV and Resistivity of Transformer's oil. After Dehydration and Filtration of Oil the BDV of Oil should be around 60 KV.
According to the transformer oil change it is very economic
Used transformer oil can be brought up to the equivalent point of new oil
Transformer within the moisture, sludge, acids and harmful gases to destroy and the insulation values will be higher than old.
Transformer oil life is extended.
As a result of the occurrence waste oil and disposal costs would have been zero.
Waste oil has been blocked and prevented its negative given for the enviroment.