Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrical Characteristics of Insulation Paper for Distribution Transformers

배전변압기용 절연지의 전기적 특성

  • Jung, J.W. (Power Dist. Tech. Grp., Power Sys. Lab., KEPRI, KEPCO) ;
  • Song, I.K. (Power Dist. Tech. Grp., Power Sys. Lab., KEPRI, KEPCO) ;
  • Lee, B.S. (Power Dist. Tech. Grp., Power Sys. Lab., KEPRI, KEPCO) ;
  • Han, J.H. (Power Dist. Tech. Grp., Power Sys. Lab., KEPRI, KEPCO) ;
  • Kweon, D.J. (Power Dist. Tech. Grp., Power Sys. Lab., KEPRI, KEPCO) ;
  • Kim, C.Y. (Div. of Semiconductor, Electricity, Automobile Eng., Woosuk Univ.)
  • Published : 2001.05.11
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Abstract

This paper describes the electrical characteristics of Nomex paper employed as an insulating material of distribution transformers. The relative permittivities(dielectric constants) and $tan{\delta}$(dielectric dissipation factors) were measured as a dielectric characteristic and the partial discharge inception voltages(PDIVs) and breakdown voltages were also measured as an electrical strength characteristic of Nomex paper. As a result, the permittivity and $tan{\delta}$ of Nomex paper showed temperature and frequency dependency. Especially, the permittivity of 0.18mm Nomex paper was 2.4 according to the ASTM condition. And the PDIVs and breakdown voltages were, almost linearly increased with the thickness of Nomex paper and its electrical strength was better than conventional kraft paper.

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