SEM OFE Medium Voltage Reeling Cable with Integrated Optical Fibres up to 12/20 (24) kV Flexible EPR Insulated PUR Sheathed Reeling Cable for Mining, Tunnelling, and Material Handling Applications

Product Overview

This medium voltage reeling cable with integrated optical fibre elements is engineered for demanding industrial environments where both power transmission and data communication are required. Designed with a reinforced polyurethane (PUR) outer sheath and anti-twisting structure, the cable performs reliably in dynamic applications such as mining operations, tunnelling systems, and grab unloaders.

Its hybrid design combines electrical power cores with multimode optical fibres, enabling simultaneous energy supply and high-speed signal transmission—an essential feature for modern automated and monitored industrial systems.

Key Applications

• Mining operations (surface and underground)

• Tunnelling equipment and infrastructure

• Reeling systems and cable drums

• Grab unloaders in ports and bulk material handling

• Heavy-duty mobile machinery requiring power + data integration

Cable Construction (Design Details)

This cable is carefully engineered with multiple functional layers to ensure durability, flexibility, and electrical reliability:

1. Conductor
   Flexible plain copper conductor (Class 5) in accordance with IEC 60228

2. Inner Semi-Conductive Layer
   Ensures uniform electric field distribution

3. Insulation
   High-performance EPR (Ethylene Propylene Rubber) insulation for excellent dielectric properties

4. Outer Semi-Conductive Layer
   Provides electrical stress control

5. Protective Earth Conductor
   Flexible copper conductor (Class 5, IEC 60228 compliant)

6. Semi-Conductive Layer on Earth Conductor
   Enhances grounding and electrical safety

7. Optical Fibre Element (OFE)
   Multimode optical fibres (62.5/125 μm) for communication and monitoring systems

8. Outer Sheath
   Double-layer PUR (polyurethane) sheath with anti-twisting reinforcement

   • Colour: Red

   • Highly resistant to mechanical stress and environmental factors

Core Configuration

Six-core design includes:

• 3 power phase conductors

• 2 protective earth conductors

• 1 integrated optical fibre element

Marking

Cable marking includes:

• Cable type and voltage rating

• Number of cores and cross-section

• Manufacturing year and week

Standards

• Manufactured according to internal technical specifications

• Conductor compliant with IEC 60228

Mechanical Properties

• Maximum tensile load: 20 N/mm² (based on copper cross-section)

• Reeling speed: Up to 120 m/min

• Mechanical tests:

  • Alternating/reversed bending test

  • Torsional resistance test

These properties ensure long service life under continuous flexing and reeling conditions.

Chemical & Environmental Resistance

• Oil resistant

• Suitable for outdoor applications

• Resistant to:

  • Moisture

  • UV radiation

  • Ozone

This makes the cable ideal for harsh industrial and mining environments.

Electrical, Optical & Thermal Properties

Voltage Ratings

• Nominal voltage (Uo/U): 3.6/6 kV up to 12/20 kV

• Maximum system voltage (Um): 1.2 × U

• Test voltage: 3.5 × Uo (AC)

Thermal Performance

• Max conductor temperature:

  • +90°C (normal operation)

  • +250°C (short-circuit conditions)

• Max surface temperature:

  • Fixed installation: -40°C to +80°C

  • Mobile operation: -25°C to +80°C

Optical Performance

• Integrated multimode optical fibres support real-time data transmission for monitoring and control systems.     

Key Advantages

• Hybrid functionality: Power + data transmission in one cable

• High flexibility: Ideal for reeling and dynamic operations

• Exceptional durability: Reinforced PUR sheath resists wear and torsion

• Enhanced safety: Integrated earth conductors and controlled electric field design

• Smart system ready: Optical fibres enable monitoring, automation, and diagnostics

• Wide voltage range: Suitable for medium voltage applications up to 24 kV

This medium voltage reeling cable with integrated optical fibres represents a next-generation solution for industries requiring both reliable power delivery and advanced communication capabilities. Its robust mechanical design, high electrical performance, and environmental resistance make it particularly suitable for mining, tunnelling, and heavy-duty industrial applications.

By combining durability, flexibility, and intelligent monitoring capabilities, this cable significantly improves operational efficiency, safety, and system integration in modern industrial environments.