SEM Medium Voltage Reeling Cable with Reinforced PUR Sheath for Mining, Tunnelling and Grab Applications (3.6/6 kV to 12/20 kV)

Product Overview

This medium voltage reeling cable is specifically designed for demanding mobile applications such as mining operations, tunnelling systems, and grab unloaders. With a double-layer reinforced polyurethane (PUR) outer sheath, the cable delivers outstanding resistance to mechanical stress, torsion, abrasion, and environmental exposure.

Its robust design ensures reliable performance under continuous reeling, frequent bending, and high tensile loads, making it an ideal solution for heavy-duty industrial environments.

Key Applications

• Mining equipment (continuous miners, shuttle cars, reeling drums)

• Tunnelling machinery and underground infrastructure

• Grab and crane systems (e.g., grab ship unloaders)

• Heavy-duty mobile power supply systems

• Outdoor industrial installations exposed to harsh conditions

Cable Design and Construction

This cable is engineered with a multi-layer structure to ensure electrical reliability, mechanical durability, and operational safety.

Conductor

• Flexible plain copper conductor

• Class 5 according to IEC 60228

• Optimized for dynamic applications requiring repeated bending

Semi-Conductive Layers

• Applied over conductor and insulation

• Ensures uniform electric field distribution

• Enhances insulation performance and reduces electrical stress

Insulation

• Ethylene Propylene Rubber (EPR)

• Excellent dielectric properties

• High thermal stability and resistance to aging

Protective Earth Conductors

• Flexible copper conductors (Class 5 IEC 60228)

• Separate earth cores for enhanced safety

• Additional semi-conductive layer applied on earth conductors

Outer Sheath

• Double-layer polyurethane (PUR) sheath

• Reinforced with anti-twisting structure

• Colour: Red

• Provides:

  • High abrasion resistance

  • Excellent tear strength

  • Superior torsional resistance

Core Configuration and Identification

Core Design

• Six-core configuration:

  • 3 phase conductors

  • 3 protective earth conductors

Core Identification

• Clear differentiation between phase and earth cores

• Designed for safe and easy installation

Marking

The cable is marked with:

• Product identification and voltage rating

• Number of cores and cross-sectional area

• Manufacturing date (year and week)

Standards

• Manufactured according to internal engineering specifications

• Designed to meet the requirements of demanding industrial applications

Mechanical Properties

This cable is optimized for high mechanical stress environments:

• Maximum tensile load:
  20 N/mm² of total copper cross-section

• Bending performance:
  Designed for repeated bending and reeling operations

• Testing:

  • Alternating bending test

  • Reversed bending test

  • Torsional resistance test

• Reeling speed:
  Up to 120 m/min
  (Higher speeds available upon request)

Chemical and Environmental Resistance

The cable is suitable for harsh industrial environments:

• Oil resistant

• Moisture resistant

• UV resistant

• Ozone resistant

• Suitable for outdoor applications

Electrical Properties

• 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)

These characteristics ensure reliable insulation performance even under high electrical stress.

Thermal Properties

• Maximum conductor temperature:

  • +90 °C (normal operation)

  • +250 °C (short-circuit conditions)

• Maximum surface temperature:

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

  • Mobile operation: −25 °C to +80 °C

Key Advantages

• Excellent flexibility for reeling and dynamic applications

• High tensile strength and torsion resistance

• Durable PUR sheath with anti-twisting reinforcement

• Reliable electrical performance under medium voltage conditions

• Suitable for extreme environmental conditions

• Long service life in harsh industrial operations

This medium voltage reeling cable represents a high-performance solution for demanding industrial applications, combining mechanical robustness, electrical reliability, and environmental resistance. Its advanced design ensures safe and efficient operation in mining, tunnelling, and heavy-duty material handling systems.

For industries requiring durable, flexible, and high-voltage mobile power cables, this product offers a proven and reliable solution.