It is important to test and monitor transformers. Future transformer designs will continue to reduce performance margins, making testing even more important. Relatively speaking, testing is inexpensive and very informative as to what is occurring inside the transformer. Oil testing allows the customer to prevent minor "problems" from turning into major "problems". Purchasing a substation transformer is a major a financial investment. If the customer is proactive in maintaining the transformer oil, it can prolong the life of the transformer and delay the inevitable need to replace the unit. However, when the need arises to treat the oil, it is important to understand the options available and the how the processes work to treat the symptoms of the problem.
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