A new diagnostic method to support standard frequency response analysis assessments for diagnostics of transformer winding mechanical failures

@article{Pham2014AND,
  title={A new diagnostic method to support standard frequency response analysis assessments for diagnostics of transformer winding mechanical failures},
  author={Dinh Pham and Thu-Le Pham and Hossein Borsi and Ernst Gockenbach},
  journal={IEEE Electrical Insulation Magazine},
  year={2014},
  volume={30},
  pages={34-41}
}
The standard frequency response analysis (FRA) is not fully efficient for diagnostics of mechanical failures in power transformers. The article recommends that physical electrical parameters of the transformers should be analyzed in addition to support the current FRA assessment. 
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Mechanical-condition assessment of transformer windings using FRA

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  • April 2008.
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Transformer FRA interpretation for detection of winding movement

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