随着轨道交通建设的不断推进,轨道交通机车用电线电缆的防火性能成为关注焦点.本文以国际标准EN 45545-2:2020和国内相关标准(如GB/T 12528-2008、GB/T 19666-2019、TB/T 1484系列标准)为比对基准,从测试项目、测试方法和指标要求等方面对轨道交通机车用电线电缆防火性能进行了分析.结果表明,我国标准未明确防火等级划分,相比EN 45545-2:2020,我国标准对性能指标要求相同或更高;在测试项目和方法上,国内外标准基本一致,但在产烟毒性测试方法上存在差异.建议我国标准修订加强防火等级划分和规范,促进与国际标准接轨,推动我国轨道交通机车用材料的规范化和标准化发展.
With the continuous development of construction of rail traffic,the fireproof performance of wires and cables for rail locomotives has become a spotlight.This paper conducts an analysis of the fireproof performance of wires and cables for rail locomotives,comparing international standard EN 45545-2:2020 and relevant Chinese standards(such as GB/T 12528-2008,GB/T 19666-2019 and TB/T 1484 series),from the aspects of testing projects,testing methods,and indicators.The key findings are as follows:Chinese standards lack of a clear fireproof grading system;standards in China have the same or higher requirements,compared to EN 45545-2:2020;standards at home and abroad are basically the same in terms of testing projects and methods,but are different in the testing method for smoke toxicity.The paper proposes the revision of Chinese standards to enhance the grading and regulation of fire resistance,promote alignment with international standards,and boost the standardized development of materials for rail locomotives in China.