主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2026, Vol. 44 ›› Issue (1): 1-6.

• •    下一篇

电缆绝缘材料热解温度与电缆绝缘失效温度的相关性研究

刘小松1, 孙加洁1, 邓宇翔1, 顾季蒙1, 王红双1, 刘潇2, 李强2   

  1. （1.交铁检验认证（常州）有限公司，江苏 常州 213017； 2.中国人民警察大学，河北 廊坊 065000）
  • 收稿日期:2024-11-20 修回日期:2025-02-25 出版日期:2026-01-15 发布日期:2026-01-15
  • 作者简介:刘小松，交铁检验认证（常州）有限公司，江苏省常州市武进区潞城街道龙锦路355号2号楼，213017。
  • 基金资助:
    中国人民警察大学校级科研重点专项课题（ZDZX202005）

Research on the correlation between the pyrolysis temperature of cable insulation materials and the insulation failure temperature of cable

Liu Xiaosong1, Sun Jiajie1, Deng Yuxiang1, Gu Jimeng1, Wang Hongshuang1, Liu Xiao2, Li Qiang2   

  1. (1. JRCC (Changzhou) Co., Ltd., Changzhou Jiangsu 213017, China; 2. China People's Police University, Langfang Hebei 065000, China)
  • Received:2024-11-20 Revised:2025-02-25 Online:2026-01-15 Published:2026-01-15

摘要： 为探究电缆绝缘材料热解温度与电缆绝缘失效温度的相关性，采用热重分析试验和辐射加热试验分别获取了电缆绝缘材料的热解温度和电缆绝缘失效温度。研究中使用1E级电缆，考虑了热老化对试验结果的影响。结果表明，电缆绝缘材料DTG曲线出现第一次明显波动时的热解温度与以电缆绝缘电阻下降一个数量级作为电缆失效判定标准得到的绝缘失效温度基本相同，误差小于10%；DTG曲线开始远离水平曲线时的热解温度与热老化120 h及264 h后，以电缆绝缘电阻下降两个数量级或在电阻下降斜率最大处做切线，切线与临界值交点作为电缆失效判定标准得到的绝缘失效温度基本相同，误差小于20%；而采用其他电缆绝缘失效判定标准所得的绝缘失效温度与热解温度差异大。

关键词: 电缆, 绝缘材料, 热解特性, 绝缘失效温度

Abstract: To investigate the correlation between the pyrolysis temperature of cable insulation materials and the insulation failure temperature of cables, the pyrolysis temperature of cable insulation materials and the insulation failure temperature of cables were obtained respectively through thermogravimetric analysis experiments and radiation heating experiments. In the study, Class 1E cables were used, and the influence of thermal aging on the experimental results was considered. The results indicate that the pyrolysis temperature when the first peak of the DTG curve of the cable insulation material appears is essentially the same as the insulation failure temperature obtained by using the criterion of a one order magnitude of decrease in cable insulation resistance as the determination standard for cable failure, with an error of less than 10%; The pyrolysis temperature when the DTG curve starts to deviate from the horizontal curve is essentially the same as the insulation failure temperature obtained by using the criterion of a two order magnitude of decrease in insulation resistance or by drawing a tangent at the maximum slope of resistance decrease and taking the intersection point with the critical value as the determination standard for cable failure after 120 h and 264 h of thermal aging, with an error of less than 20%; While the insulation failure temperatures obtained by using other cable insulation failure determination standards differ significantly from the pyrolysis temperature.

Key words: cable, insulation material, pyrolysis characteristics, insulation failure temperature