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March 2, 2009

Mtg: Condition Monitoring of Power Transformers using Dissolved Gas Analysis (DGA)

by @ 10:03 am. Filed under ALL, Electrical/Power
 

MONDAY March 16, 2009
SF Power & Energy Chapter
Speaker: Dr. Ahmad Shahsiah, senior engineer, Exponent, Inc (Failure Analysis Associates)
Time: Light lunch and talk at 12:00 PM Noon
Cost: Free for IEEE members, $5 for non-members
Place: Pacific Gas & Electric Office, 77 Beale St. Room 305, San Francisco
RSVP: by March 14 to John Joven, jrjj@pge.com, 415-973-4873
Web: www.e-grid.net/docs/0903-sf-pes.pdf

Dissolved Gas Analysis (DGA) is a well-established method to monitor and predict the condition of devices with oil-cellulose insulation, especially power transformers. IEC 60599 defines characteristic gases for power transformers. However, the effect of migration of these gases between the liquid and solid insulation is often ignored. The migration phenomenon is temperature-dependent and when ignored, it can potentially lead to erroneous condition assessment by the DGA method. These errors can cause misinterpretation of a transformer condition based on the DGA data.

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