Abstract
The paper presents identi cation results of deformation processes within power oil transformers where according to dissolved gas analysis investigation results partial discharges took place. The original method worked out for analysis of acoustic emission signals recorded within tested transformer and particularly maps of ADC descriptors have been applied. Analysis has been carried out within chosen frequency bands in order to distinguish signals coming from di erent sources (among other things partial discharges, Barkhausen's e ect, circulation of the oil, and outer acoustic sources). One source of partial discharges has been identi ed within the tested transformer as a result of analysis of acoustic emission signals.
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