It is recommended that DGA be performed annually with results compared from year to year. The value of our analysis increases once lifetime trending is made available.
In addition to DGA, the oil quality is also evaluated. In order for the insulating fluid to perform optimally it should meet certain criteria/test limits. No one technique will be able to accurately assess the transformer condition: they are all used together to provide a good evaluation. Being able to distinguish small changes in the fluid quality is important because once the oil is contaminated (oxidized, excessive water, sludge, etc) it is more difficult to successfully reclaim the oil. Once in the paper insulation system these contaminants are difficult to remove and ultimately reduce the life of the transformer.
Computerized Analysis and Reporting
The laboratory results are uploaded into our analyzing software (Delta X Research Transformer Oil Analyst™ software – TOA4). TOA4 provides state-of-the-art computerized interpretation of insulating fluid test results. With this software, we are able to quickly process test data and identify abnormal results so that decisive action can be taken to correct problems and prevent avoidable equipment failure. A written report detailing findings, recommendations and corrective actions is also provided.