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Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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Open Access
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2300-1909
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Study of Composite Insulator Sheds Subjected to Wheel Test

M. Mackiewicz / J.L. Mikulski / J. Wańkowicz / S. Kucharski
  • Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawińskiego Str., 02-106 Warszawa, Poland
  • Other articles by this author:
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/ P. Ranachowski
  • Corresponding author
  • Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawińskiego Str., 02-106 Warszawa, Poland
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Z. Ranachowski
  • Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawińskiego Str., 02-106 Warszawa, Poland
  • Other articles by this author:
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Published Online: 2017-07-22 | DOI: https://doi.org/10.1515/amm-2017-0101

Abstract

The paper presents investigation of the properties of the surface and the material stiffness – flexibility of series of samples taken from the sheds of the composite insulators. The insulators were previously subjected to wheel test. The wheel test and 1000 h salt fog test are regarded as alternative examination of the material resistance to the effects of electrical surface discharges. There were investigated two series of the samples of the composite insulators sheds. Examined specimens, made of HTV silicone rubber, were taken from the sheds of medium-voltage composite insulators of two different manufacturers. Insulators of both types passed the 1000 h salt fog test without reservation. Meanwhile, the wheel test can provide a basis for better distinguishing between physical properties of the tested materials. In the case of the insulators of one of the manufacturers the wheel test result was negative. Cross puncture effect of the sheds took place in several places. In addition, sheds were covered with dark coating of varying thicknesses. The results of the study indicated a significantly stronger influence of electrical and temperature factors on the sheds under investigations during the wheel test than in the case of the 1000 h salt fog test. It can be stated that these tests cannot be considered as alternative and it seems that wheel test enables better distinguishing between properties of the materials.

Keywords: composite insulators; silicone rubber; wheel test; electrical surface discharges; tracking and erosion

REFERENCES

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About the article

Published Online: 2017-07-22

Published in Print: 2017-06-01


Citation Information: Archives of Metallurgy and Materials, ISSN (Online) 2300-1909, DOI: https://doi.org/10.1515/amm-2017-0101.

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© 2017 Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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