Benefits of On-line DGA Tap Changer Monitoring

A paper has recently been written outlining the Benefits of On-line DGA Tap Changer Monitoring. The introduction of the paper is available below. Click on the link at the bottom of the page to view the paper in full.

Introduction
Dissolved gas in oil analysis has been widely accepted on behalf of transformer main tanks for many years. In recent years, it has gained notoriety for load tap changers as well. There are certainly varying opinions regarding evaluation technique, but the value of testing has now been accepted by a wide audience. The varying techniques for interpretation centers around the challenges of “how” to handle the data from varying types of arcing tap changers. Some of these units are sealed, and thereby present challenges unique to sealed units. Free breathers are less difficult, and the data is always fresh, creating fewer challenges to the utility.

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