介绍了轨道交通车辆防火安全对低压配电产品材料选型设计的要求以及轨道交通车辆专用低压配电产品的材料设计解决方案.依据 EN 45545 标准的要求,并结合我国轨道交通车辆火灾防护的实际应用情况,建议材料设计选型应当从降低材料的可燃性、减少材料燃烧的烟雾产生和烟雾毒性、提高材料的阻燃性能、降低电气设备自身故障导致的火灾风险、有效阻止或延缓外部明火蔓延以及平衡材料经济成本和使用性能等方面的因素进行分析评估,并对相应的表征参数进行了建议.文章比较了不同类别的改性尼龙材料的使用性能和成本经济性,并且对比分析了市场上国内外低压配电品牌产品的材料设计方案及性能.在此基础上,针对客户需求、应用场景和安全等级的不同,对小型断路器、接触器和电机保护断路器等产品定制化设计了经济型和最高防火等级的材料方案,并且兼顾了低温和高海拔等特殊环境应用对于材料提出的挑战,以期为轨道交通车辆应用提供火灾防护等级更高、更加安全可靠、更具经济成本优势的低压配电产品,保障火灾发生时提供更长的黄金逃生时间,更好地维护车辆和乘客安全.
Material Design Solution with High Fire Safety Class for Low-voltage Distribution Products of Rail Transit Vehicles
This article introduces the fire safety requirement of rail transit vehicles for selection and design of materials of low-voltage distribution products and the material design solution for low-voltage distribution products dedicated to rail transit vehicles.In accordance with EN 45545 and considering the actual fire protection application in rail transit vehicles of China,it suggests that the design and selection of materials shall be analyzed and evaluated from the aspects of reducing the flammability of materials,reducing the generation and toxicity of smoke from material combustion,improve the flame retardancy of materials,reducing the fire risk caused by electrical equipment failures,effectively prevent or delay the spread of external open flame and balance the economic cost and the service performance of materials,and it also proposes relevant characterization parameters.In addition,the article compares different categories of modified nylon materials in terms of service performance and cost efficiency,compares and analyzes the material design schemes and performances of some domestic and foreign low-voltage distribution products on the market.On this basis,it customizes the material design scheme with higher cost efficiency and the highest fire safety class for products such as small circuit breakers,contactors and motor protective circuit breakers according to different customer demands,application scenarios and safety classes,taking into account the challenges posed by special environmental applications such as low temperature and high altitude for materials in order to provide the low-voltage distribution products with higher fire protection class,safety,reliability and cost efficiency for application in rail transit vehicles,ensure longer golden evacuation time in case of fire disaster and better maintain the safety of vehicles and passengers.
NETL
NSTL
万方数据
维普
