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The high voltage power equipment is required to perform well in some extremely harsh environment, such as hot and humid conditions. Epoxy resin (EP) and polyetheretherketone (PEEK) are commonly used as the insulation materials for high voltage power equipment, and their performances in humid environment are generally and extensively concerned. This paper experimentally investigated the water absorption properties of EP and PEEK and their influence on the flashover properties of EP-rubber and PEEK-rubber interfaces. The results show that EP have higher water absorption than PEEK, and the saturation time is close to 100 h. The DC flashover electric field (Ef-DC) of dry EP-rubber interface is 6.1 kV/mm, ~6.7% higher than that of PEEK-rubber. However, when the water absorption gets saturated, the Ef-DC of EP-rubber interface decreases dramatically to 3.6 kV/mm, which is ~10.8% lower than the Ef-DC of PEEK-rubber. The research provides fundamental data of the insulation strength of EP and PEEK in humid environment and is helpful for the improvement of the reliability and stability of high voltage power equipment.

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Flashover Properties of Polyetheretherketone and Epoxy Resin for Power Equipment in Humid Environment

  • 会议论文

  • 发表日期：

    2025年

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  • Haihui Wang,
  • Simiao Chen,
  • Haitao Xu,
  • Xiaoang Li,
  • Qiaogen Zhang

摘要

The high voltage power equipment is required to perform well in some extremely harsh environment, such as hot and humid conditions. Epoxy resin (EP) and polyetheretherketone (PEEK) are commonly used as the insulation materials for high voltage power equipment, and their performances in humid environment are generally and extensively concerned. This paper experimentally investigated the water absorption properties of EP and PEEK and their influence on the flashover properties of EP-rubber and PEEK-rubber interfaces. The results show that EP have higher water absorption than PEEK, and the saturation time is close to 100 h. The DC flashover electric field (Ef-DC) of dry EP-rubber interface is 6.1 kV/mm, ~6.7% higher than that of PEEK-rubber. However, when the water absorption gets saturated, the Ef-DC of EP-rubber interface decreases dramatically to 3.6 kV/mm, which is ~10.8% lower than the Ef-DC of PEEK-rubber. The research provides fundamental data of the insulation strength of EP and PEEK in humid environment and is helpful for the improvement of the reliability and stability of high voltage power equipment.