Research
0356: Dissection, Condition Assessment and Analysis of Windings Taken From Failed In Service Units
Dissections of 34 stator coils and bars from 10 hydrogenerators in 9 utilities were performed in this project. The generator windings had seen from 6 to 56 years of operation, and from 600 to 25,000 starts. All the windings were made from thermosetting insulating materials, mainly mica paper bonded with epoxy. The results of the dissections were correlated with operating information, on-line and off-line test results performed at the generating stations, as well as diagnostic tests performed on
Dec 17, 2008 - Jul 30, 2019