Insulating Fluid Analysis
Insulating fluid analysis is a proven loss prevention technique which should be part of any preventive maintenance program.
Protecting Transformers and Other Fluid Filled Electrical Equipment
Fluid monitoring and analysis is the key to electrical equipment reliability, performance and longevity.
Protect Your Investment
Insulating fluid analysis is a proven loss prevention technique, and a key component of any preventive maintenance program. Oil sampling is the most effective and cost efficient test that can be performed on electrical equipment, since the majority of the testing is done online, with no power interruption. It has been estimated that transformer fluids contain approximately 70% of the diagnostic information available for transformers. Sampling provides a means to check the condition of the oil and how it compares to industry averages. For in-service transformers, sampling and testing the oil provides a method to determine the condition of the solid and liquid insulation systems, as well as the operating condition of the unit, without opening or de-energizing the transformer.
Early detection is key to preventing unscheduled outages. Understanding transformer condition on the basis of fluid analysis can prevent transformer failure. Electrical insulating oil and cellulosic insulation breaks down under abnormal thermal or electrical stress. The results of these stresses are the appearance of volatile and non-volatile gases, known as fault gases. Gas analysis technique identifies fault gases, and relates their quantity, generation rate and relevant ratios to type and severity of fault.
Typical Problems Detected
Degradation of paper insulation
Our Standard Test Package
Dissolved Gas Analysis (DGA), ASTM Standard D-3612
Moisture Content, ASTM Standard D-1533B
Interfacial Tension, ASTM Standard D-971
Acid Number, ASTM Standard D-974
Color Number, ASTM Standard D-1500
Visual Examination, ASTM Standard D-1524
Dielectric Strength, ASTM Standard D-1816 @ 1mm
Power Factor, ASTM Standard D-924
Furan, ASTM Standard D-5837
PCB Testing, GC - MS/MS Method
Metals, ASTM D-5185
Particle Count, Laser Technique
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.
Our technical experts are here to help.