Dissolved Gas Analysis

The Dissolved Gas Analysis (English, DGA, German analysis of dissolved gases ) is a procedure that is used for condition assessment of power transformers. This takes advantage of that split off by supplying energy gases from the hydrocarbon chains of the transformer oil and dissolved in the oil. From the proportion relations ( cf. Duval Triangle - IEC 60599 ) of various gases to each other can be an assessment as to which added energy has caused the emergence of this. However, this requires certain minimum concentrations of the gases. This distinction can be made between thermal ( due to local temperature increases) and electrical faults (such as discharges in the active part ). The IEC standard 60599 requires a measurement method for such a distinction.

Swell

• 4 Regensburg transformer Symposium - Symposium Contributions ( PDF; 199 kB), accessed on 2 March 2013.