International Sugar Journal

Transformer oil maintenance* [Full subscriber]

In electrical distribution, the transformer is the workhorse of the industry. The majority of transformers are oil filled, air cooled units which are frequently neglected after installation. However, even a poorly maintained transformer may perform adequately for many years without incident. Water retention resulting in corrosion is the major cause of failure in transformers that have passed the initial high failure time zone. The secondary effects of corrosion, acid formation, and the degeneration of the insulation material can lead to failures under short term stress conditions while the protection clears the fault. Traditional drying methods take long periods of time…

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