Abstract

The contribution presents the new non-destructive diagnostic methods for the insulating material diagnostics of electrical rotary machine windings. The theory of the diagnostic methods is presented, and these methods are verified in laboratory conditions on Relanex insulating material. This material is used for insulation of electrical rotary machine windings. Attention is focused on determining the breakdown voltage correlation with diagnostic quantities. The relationship between breakdown voltage and the diagnostic quantities is also assessed by a non-traditional method, i.e., by a cluster analysis. More methods of the cluster analysis were used, and all results obtained were analysed and justified.

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