Articles

In this short article from Electricity Today, Drs. Draper and Dukarm describe what modern statistics can say about transformer risk assessment, once steps have been taken to improve DGA interpretation (as outlined in previous articles).

Data quality is essential for effective dissolved gas analysis. Trend evaluation and accurate assessment of short-term changes require accuracy and low measurement variability of gas data – so data quality problems must be recognized and dealt with before any DGA interpretation is attempted. Learn more about common data quality issues in this short article from… Continue reading →

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.

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.

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 →