Advancements in Dissolved Gas Analysis: CO/CO2 Ratio

When conducting dissolved gas analysis, the detection of carbon oxide gases indicates a deterioration of paper insulation within the transformer. Find out more about how the ratio of these gasses can be used to help assess possible issues within the transformer in this short article from Electricity Today Magazine.

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Advancements in Dissolved Gas Analysis: Investigating Failure Cases

In this article, Drs. Draper and Dukarm discuss three case histories that illustrate the usefulness of recent innovations in transformer DGA, especially when there is gas loss.

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Advanced Moisture Assessment for Transformers

Moisture assessment is a complex topic for when it comes to high-voltage transformers. It’s difficult to interpret the water content of oil or paper insulation by looking at individual dissolved water measurements or time-series data, and increases in water solubility due to aging of oil make it risky to rely on relative saturation calculated from… Continue reading

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Advancements in Dissolved Gas Analysis: NEI & Gassing Events

Normalized energy intensity (NEI), a fault energy index based on the standard heats of formation of fault gases, provides a useful way to look at fault severity. Check out this short article by Dr. Zachary Draper and Dr. Jim Dukarm from Electricity Today Magazine on how NEI can be used to assess and track faults… Continue reading

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Advancements in Dissolved Gas Analysis: Accounting for Gas Loss

Gas loss within a transformer can hide serious problems for dissolved gas analysis results. Check out this short article by Dr. Zachary Draper and Dr. Jim Dukarm from the High Voltage Electrical Testing special edition of Electricity Today Magazine on how gas loss can be taken into consideration in dissolved gas analysis interpretation to improve… Continue reading

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