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A long-term aging experiment is currently under way on six stator bars subjected to slot partial discharges (PD) activity under electrical, thermal and mechanical stresses. Slot PD were induced on each bar by abrading a portion of their semi-conductive coating. All bars were subjected to accelerated aging at twice their nominal voltage. Two bars were only electrically stressed, two others were electrically...
To improve the understanding of slot partial discharges (PD) activity in air-cooled generators, an accelerated aging test was conducted under different stress conditions on a total of six stator bars. The bars, which had been previously modified by the abrasion of a portion of their semi-conductive coating in order to create slot PD activity, were divided into three groups of two. The first group...
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