Acidity Test of Transformer Insulating Oil Causes of Acidity in Insulating Oil

In insulating oil in the transformer may occasionally come into contact with air. It may be during opening any blanking or due to leakage in the oil tanks or in associated pipe lines. Because of that the oxidation reaction in the transformer oil takes place, which further be accelerated due to temperature and presence of catalysts like iron, copper and dissolved metallic compounds in the transformer oil.