As rail transit develops toward higher speed, smarter systems, and higher-density operation, railway vehicles now require higher safety, fire resistance, and long-term stability from cable systems. Whether for high-speed rail, metro systems, EMUs, or urban rail transit vehicles, cable systems must operate stably under long-term vibration, temperature cycling, oil contamination, limited space, and fire risk environments.
In the European rail transit cable system, EN50306 and EN50264 are two widely used standards.
Many railway cable manufacturers often face the following questions when selecting Railway cable XLPO compound materials:
What is the difference between EN50306 and EN50264?
What cable structures are suitable for these two standards?
How should Railway cable insulation material and Railway cable sheath compound be matched?
Why do some projects specify Halogen free railway cable compound?
What is the difference between Irradiation crosslinked polyolefin compound and ordinary crosslinked materials?
In fact, EN50306 and EN50264 are not simply different standard numbers. Behind them are completely different railway cable application logic, structure design, and material systems.
This article will systematically analyze the key differences between EN50306 cable material and EN50264 cable compound from the perspectives of standard positioning, application scenarios, structure requirements, material systems, and actual engineering applications.
The operating environment of railway vehicles is much more complex than that of ordinary industrial equipment.
Railway cables work for long periods under continuous vibration, long-term mechanical friction, temperature cycling, humidity, oil contamination, and limited installation space. Traditional PVC materials can easily soften under high temperatures and release large amounts of corrosive gases and smoke during burning. Therefore, mainstream rail transit projects now gradually use LSZH railway cable material systems.
Among them, Irradiation crosslinked polyolefin compound has become a core material in modern Rail transit cable compound applications because it provides higher heat resistance, stable insulation performance, better mechanical strength, low-smoke halogen-free performance, and good long-term aging resistance.
Both EN50306 and EN50264 are essentially cable and material standard systems built around Halogen free railway cable compound.
Many companies mistakenly believe that EN50306 and EN50264 can replace each other, but in reality, they correspond to different types of railway cables.
EN50306 mainly focuses on thin-wall cables inside railway vehicles, lightweight wiring, small-size control cables, signal cables, and low-voltage cables. This standard places more emphasis on cable flexibility, small outer diameter, lightweight structure, wiring ability in narrow spaces, flame retardancy, and low smoke performance.
Therefore, EN50306 cable material is more suitable for:
Thin-wall Railway cable insulation material
Small-size XLPO compound for railway cable
In comparison, EN50264 mainly applies to main circuit power cables, high-temperature area cables, large-current transmission cables, and railway high-voltage cables.
EN50264 pays more attention to the high-temperature stability, long-term thermal aging performance, thick insulation structures, oil resistance, and mechanical strength of railway cable materials.
The related material systems usually include:
High heat resistant Irradiation crosslinked polyolefin compound
High mechanical strength Railway cable sheath compound
Thick-wall LSZH railway cable material
The differences between the standards are ultimately reflected in cable structure design.
EN50306 cable materials are commonly used in railway cables with thin-wall insulation, small outer diameter design, higher flexibility, and smaller bending radius.
Common conductor sizes include: 0.5 mm², 0.75 mm², 1.0 mm², 1.5 mm², and 2.5 mm².
The insulation thickness is usually thin, around 0.2 mm to 0.4 mm. The overall cable outer diameter is generally kept small.
This type of structure requires Railway cable XLPO compound to provide stable extrusion performance, accurate size control, high flexibility, and no cracking during thin-wall extrusion. Therefore, EN50306 cable material requires very high flowability and processing stability.
EN50264 cables usually use thick-wall insulation, high mechanical strength sheaths, higher heat resistance levels, and stronger abrasion resistance.
Common conductor sizes include: 10 mm², 25 mm², 50 mm², 95 mm², and 120 mm².
The insulation thickness is significantly thicker, generally between 0.6 mm and 1.5 mm.
Some power cables may also include shielding layers, armor layers, and reinforcement structures.
Therefore, EN50264 cable compound focuses more on thermal aging stability, long mechanical service life, stable extrusion for large cross-sections, crack resistance, and oil resistance.
Although both belong to the XLPO compound for railway cable system, their material design directions are completely different.
EN50306 materials focus more on the following characteristics:
Because these cables are widely used for internal train wiring, finished cables must be easy to bend, easy to install, and stable in narrow installation spaces.
Therefore, these cable materials usually have lower modulus and better flexibility.
Because the insulation layer is thin, the material must provide smooth surface quality after extrusion, stable extrusion performance, and low eccentricity.
Otherwise, uneven insulation thickness, cracking, and air bubbles may occur.
EN50306 cables are widely used inside passenger cabins, which are enclosed public spaces. Therefore, fire safety requirements are extremely strict.
LSZH railway cable material must provide low smoke, halogen-free, low toxicity, and flame-retardant performance.
Cables under EN50264 are often used in motor areas, underfloor areas, and high-temperature power system areas.
Therefore, materials usually need to meet temperature ratings of 125℃ or even 150℃. The long-term thermal aging requirements are much higher than those for ordinary railway wires.
Because railway vehicles operate under continuous vibration and friction, Railway cable sheath compound under EN50264 must provide high abrasion resistance, tear resistance, crack resistance, and compression deformation resistance.
The underfloor area of railway vehicles is often exposed to lubricating oil, hydraulic oil, and cleaning agents. Therefore, EN50264 cable compound usually requires better oil resistance.
At present, many high-end European railway projects widely use Irradiation crosslinked polyolefin compound.
The main reasons are:
Irradiation crosslinking allows accurate control of crosslink density and improves material consistency. It is suitable for large-scale and standardized railway projects.
Railway vehicles usually have a design life of more than 20 years. Irradiated crosslinked materials are less likely to become brittle or deform under long-term high-temperature conditions.
EN50306 thin-wall structures require extremely high material stability, and irradiation crosslinking systems make it easier to control dimensions and improve surface quality.
A1: First, it depends on the standard. The most commonly used railway cable standards currently include:
China standard: GB/T34571
European standards: EN50306 / EN50264
North American standard: AAR-PR-585
The most commonly used materials under these standards are irradiation crosslinked polyolefin compounds.
A2: For Chinese standard GB/T34571 and European standards EN50306 / EN50264, Angreen can provide the 92518 series irradiation crosslinked polyolefin compounds for railway cables.
Available grades include 92518, 92518H, 92518DX, and 92518ZT. These materials can be used to produce large-size railway cables and thin-wall railway cables. They provide excellent low-temperature resistance and oil resistance.
For North American standards, Angreen can provide the 92580 series low-halogen irradiation crosslinked polyolefin compounds for railway cables. These materials provide excellent tensile strength and aging performance, while also offering excellent low-temperature resistance and oil resistance.
A3: European standards EN50264 / EN50306 recommend halogen-free flame-retardant irradiation XLPO (92518 series).
North American standard AAR-RP-585 recommends low-halogen irradiation XLPO (92580 series).
A4: Yes, they can.It is recommended to use 92518ZT or 92518DX.
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