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Transformers are a critical part of an electrical utility's asset base. Loss of a transformer in a utility, generation plant or process can cost many millions of dollars, depending on how long it is out-of-service. On-line monitoring and diagnostics is a useful tool to help operators to manage their assets and make decisions on continuing operation, maintenance or replacement. This paper illustrates...
Industry statistics suggest that 80% of all plant and equipment failures occur on a random basis and only 20% of the failures are age related. This means that 80% of failures have not been detected with common test and maintenance practices and therefore these failures have not been prevented. Based on different sources up to 30-35% of large power transformer failures are attributed to bushing insulation...
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