Oliveira, L. M. R.Cardoso, A. J. Marques2009-02-132009-02-132007Proceeding of the 20th International Congress on Condition Monitoring and Diagnostic Management (COMADEM 07). - Faro, 13-15 June 2007. - p. 263-272AUT: LOL01124;http://hdl.handle.net/10400.1/112This paper presents the application of the on-load exciting current Park's Vector Approach for diagnosing permanent and intermittent turn-to-turn winding faults in operating power transformers. First, an experimental investigation of the behaviour of the transformer under the occurrence of both permanent and intermittent winding faults is presented. Finally, experimental test results demonstrate the effectiveness of the proposed diagnostic technique, which is based on the on-line monitoring of the on-load exciting current Park's Vector patterns.application/pdfengMáquinas eléctricasTransformadores621.313TransformersWinding insulation faultsPark's vector approachjournal article