This process involves the conduction of the oil through regenerating agents (i.e. molecular screens, Fullers Earth) to retain all by-products of ageing such as acids, sludges, etc. which would otherwise defy filtering through mechanical screens.
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Patent Dr. Hoppadietz.
Transformer expansion tanks are increasingly equipped with sealing systems to protect the transformers against detrimental atmospheric influences (moisture, oxygen).
These separator systems are comprised of either membranes or bags, made of flexible material to separate the oil inside the transformer from the external atmosphere. The life span of such separator systems is normally between 10 and 15 years.
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