Separation of core losses in distribution transformers using experimental methods

J. C. Olivares-Galvan, R. Escarela-Perez, F. De León, E. Campero-Littlewood, C. Aviles Cruz

Research output: Contribution to journalArticlepeer-review


The separation of eddy current and hysteresis losses in transformer cores is obtained using the two-temperatures and the two-frequency methods. Loss calculations for six ratings using the voltage test waveform ratio are included to compare and analyze results. A brief description of the test methodologies, that are easy to apply, is given. An example of the application of the methodologies, the obtained measurements and obtained results are included. In some cases, the results show that eddy current losses for the analyzed ratings are greater than 60% of no-load losses. Results include the impact of no-load losses in total owning cost of transformers.

Original languageEnglish (US)
Pages (from-to)33-39
Number of pages7
JournalCanadian Journal of Electrical and Computer Engineering
Issue number1
StatePublished - Dec 2010


  • Distribution transformers
  • Eddy current losses
  • Iron-core losses
  • Loss separation
  • No-load test
  • Two frequency method
  • Two-temperature method
  • hysteresis losses

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering


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