ECKABEL AJ-02YSTF(L)2YDB2Y: Long-Distance Telecommunication Cable with Enhanced Protection for Railway Applications

Railway telecommunication systems demand robust and reliable cables to support long-distance signal transmission in challenging environments. The ECKABEL AJ-02YSTF(L)2YDB2Y cable is engineered to meet these demands, providing a modern solution for general cabling, especially along electrified tracks.

As a replacement for legacy F-, TF-, TFS-, and Coax-design cables, it adheres to Dlk 1.01.106 standards and offers unparalleled performance in direct burial and duct installations.

Key Features and Benefits:

• Long-distance transmission: Optimized electrical characteristics ensure signal integrity over extended distances.

• Induction protection: A copper wire screen minimizes interference from electrified tracks and other sources.

• Enhanced mechanical durability: Steel tape armouring protects against physical damage, making it ideal for direct burial.

• Water ingress prevention: Longitudinal water blocking safeguards the cable from environmental hazards.

• Cost-effective installation: Suitable for direct burial, ducts, and free air applications, reducing installation complexity and cost.

This article explores the technical specifications, challenges this cable resolves, and best practices for its installation and maintenance, providing valuable insights for railway telecommunication engineers, contractors, and maintenance teams.

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II. Technical Specifications

A. Conductor Characteristics

• Material: High-purity copper.

• Stranding Pattern: n x 4 x 1.4 + m x 4 x 0.9 mm (n = number of 1.4 mm quads, m = number of 0.9 mm quads).

Supports simultaneous transmission of multiple signal types.

B. Insulation and Construction

Component	Material	Purpose
Core Insulation	Foam-skin polyethylene (PE)	Minimizes signal attenuation.
Inner Sheath	Polyethylene (PE)	Provides mechanical protection and water resistance.
Laminated Sheath	Copolymer-coated aluminum tape	Shields against electromagnetic interference.
Screen Construction	Copper wire	Protects against inductive interference.
Armouring	Galvanized steel tape	Ensures mechanical robustness.

 

C. Outer Sheath

• Material: Polyethylene (PE), offering excellent environmental resistance.

• UV resistance and suitability for direct burial in various conditions.

D. Electrical Characteristics

Parameter	Value (0.9 mm)	Value (1.4 mm)
Loop Resistance	≤ 56.6 Ω/km	≤ 23.4 Ω/km
Insulation Resistance	≥ 10,000 MΩ·km	≥ 10,000 MΩ·km
Capacitance	≤ 34 nF/km	≤ 36 nF/km
Attenuation (800 Hz)	≤ 3.3 dB/km	≤ 2.6 dB/km
Maximum Operating Voltage	Core/Core: 2.5 kV, Core/Screen: 2.5 kV

 

 

E. Environmental Conditions

Parameter	Value
Operating Temperature	-30°C to +70°C
Installation Temperature	-5°C to +50°C
Minimum Bending Radius	10x outer diameter (multiple bends)

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III. Standards and Compliance

A. Deutsche Bahn AG PH 416.0530 v.1.1

The ECKABEL AJ-02YSTF(L)2YDB2Y cable complies with Deutsche Bahn’s stringent requirements, ensuring reliability and safety for railway telecommunication systems. Adherence to these standards guarantees:

Interoperability with existing railway infrastructure.

High performance in electrically noisy environments.

Long-term durability for demanding applications.

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IV. Challenges and Solutions

 

A. Signal Attenuation Over Long Distances

Challenge: Maintaining signal strength over extended runs.

Solution: Foam-skin PE insulation reduces attenuation, preserving signal integrity.

B. Inductive Interference

Challenge: Electromagnetic fields from electrified tracks disrupt communication.

Solution: Copper wire screening shields signals effectively.

C. Mechanical Damage During Installation

Challenge: Direct burial exposes cables to ground movement and sharp objects.

Solution: Steel tape armouring provides exceptional mechanical protection.

D. Water Ingress

Challenge: Long-term exposure to moisture degrades cable performance.

Solution: Longitudinal water blocking prevents water migration.

E. Replacement of Legacy Cables

Challenge: Upgrading outdated infrastructure with minimal disruption.

Solution: The cable is designed to match and surpass the performance of legacy types (F-, TF-, TFS-, and Coax-design).

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V. Installation and Maintenance Best Practices

A. Installation Guidelines

• Trenching and Bedding: Ensure trenches are smooth and free of sharp objects. Lay the cable on a bed of sand or fine soil.

• Backfilling: Use fine material to backfill and compact the trench in layers.

• Markers: Clearly mark the cable route to avoid accidental damage during future excavations.

B. Maintenance Recommendations

• Conduct regular inspections to detect potential ground disturbances.

• Test electrical parameters periodically to ensure signal integrity.

• Replace damaged sections promptly to avoid further degradation.

C. Proper Termination

• Use connectors compatible with shielded and armoured cables.

• Ensure grounding of the copper wire screen to maintain interference protection.

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VI. Advantages of ECKABEL AJ-02YSTF(L)2YDB2Y Cable

Feature	Customer Benefit
Foam-Skin PE Insulation	Reduced attenuation for long-distance transmission.
Copper Wire Screen	Minimal inductive interference.
Steel Tape Armouring	Resistance to mechanical damage in direct burial.
Longitudinal Water Blocking	Reliable performance in wet conditions.

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VII. Conclusion

The ECKABEL AJ-02YSTF(L)2YDB2Y cable is a cutting-edge solution for railway telecommunications, combining robust materials, advanced manufacturing processes, and compliance with strict standards. Designed to replace legacy cables, it ensures reliable long-distance communication, exceptional interference protection, and durability in demanding environments.

By adhering to the recommended installation and maintenance practices, customers can maximize the cable’s performance and longevity, ensuring a reliable telecommunication system for years to come.

For inquiries or to learn more about the ECKABEL AJ-02YSTF(L)2YDB2Y cable, contact ECKABEL today and explore how this innovative solution can revolutionize your railway infrastructure.

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