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In order to study the practical feasibility of increasing the operating temperature of polypropylene (PP) insulated cable to improve its current rating, and the influence on the thermal oxygen stability of PP cable. The thermal aging characteristics of PP cable samples and cross linked polyethliene (XLPE) cable at 100 °C were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The calculation results of ampacity and life expectancy show that the ampacity and life expectancy of PP cable at 100 °C are equivalent to those of XLPE cable at 90 °C. The results of DSC and TG tests show that the changes of crystallization parameters and thermal decomposition characteristics of PP cables are less than those of XLPE cables in the recrystallization stage and the thermal oxidative degradation stage. Therefore, judging from the thermal oxygen stability of the material, the current rating of the PP cable can be increased by raising the maximum operating temperature of the PP cable to 100 °C.

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Research on Thermal-Oxidative Stability of PP Insulated Cable for Improvement of the Current Rating

  • 会议论文

  • 发表日期：

    2025年

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  • Xiantao Tao,
  • LiZhi Zhang,
  • Fei Zhang,
  • Nan Chen,
  • Zihang Qin,
  • Hui Gong,
  • Linan Zhou,
  • Sixuan Gao

摘要

In order to study the practical feasibility of increasing the operating temperature of polypropylene (PP) insulated cable to improve its current rating, and the influence on the thermal oxygen stability of PP cable. The thermal aging characteristics of PP cable samples and cross linked polyethliene (XLPE) cable at 100 °C were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The calculation results of ampacity and life expectancy show that the ampacity and life expectancy of PP cable at 100 °C are equivalent to those of XLPE cable at 90 °C. The results of DSC and TG tests show that the changes of crystallization parameters and thermal decomposition characteristics of PP cables are less than those of XLPE cables in the recrystallization stage and the thermal oxidative degradation stage. Therefore, judging from the thermal oxygen stability of the material, the current rating of the PP cable can be increased by raising the maximum operating temperature of the PP cable to 100 °C.