Normes de câble résistant aux incendies pour les applications ferroviaires (DANS 45545)
Les environnements ferroviaires exigent une sécurité incendie stricte en raison des espaces fermés et des volumes élevés de passagers. DANS 45545 est la norme européenne qui régit les exigences du comportement d'incendie pour les matériaux utilisés dans les applications ferroviaires, y compris les harnais de fil.
What Is EN 45545?
DANS 45545-2 specifies fire testing requirements for materials used in trains.
It classifies materials into hazard levels (HL1, HL2, HL3) based on the type of rolling stock and operating conditions.
Key Testing Criteria
Flame Spread: Determines how quickly fire can propagate along a cable.
Heat Release Rate: Measures the energy emitted during combustion.
Smoke Density and Toxicity: Critical for passenger evacuation and safety.
Material and Design Considerations
Use of low-smoke, halogen-free materials
Flame-retardant insulation and sheathing
Shielding to prevent short-circuits during fire events
Certification Process
Testing performed by certified labs using EN 50305, DANS 60332, et ISO 5659-2 normes
Products must be labeled with their compliance level (Par exemple, HL3)
Conclusion
DANS 45545 compliance is critical for wire harnesses used in rail systems. By selecting appropriate materials and design approaches, manufacturers can ensure safety while meeting international railway standards.
