Single core medium voltage unarmoured cables are engineered for reliable electrical power distribution in demanding industrial and utility applications. Designed for nominal voltages ranging from 3.8/6.6KV to 19/33KV at 50Hz frequency, these cables deliver superior performance across diverse installation environments while maintaining excellent electrical and mechanical properties.
Technical Specifications
- Voltage Rating: 8.7/15KV (Uo/U)
- Frequency: 50Hz
- Voltage Range: 3.8/6.6KV to 19/33KV
- Configuration: Single core unarmoured construction
- Standards Compliance: BS 6622, IEC 60502-2, BS 7835 (LSZH Version)
Applications & Installation Environments
Primary Applications
- Power supply stations: Main distribution and feeder circuits
- Industrial facilities: Heavy-duty power distribution for manufacturing plants
- Switchboards: High-voltage switching and control installations
- Substations: Transformer connections and distribution panels
Installation Environments
- Indoor installations: Controlled environment applications in substations and industrial buildings
- Cable ducts: Protected underground routing systems
- Outdoor installations: Weather-resistant applications with appropriate protection
- Underground direct burial: Suitable for buried installations with proper protection
- Submerged applications: Water-resistant construction for underwater crossings
- Cable trays: Industrial rack-mounted installations
Cable Construction
Conductor
- Material Options:
- Plain annealed copper wire (high conductivity)
- Aluminium wire (lightweight, cost-effective)
- Construction:
- Copper conductors: Stranded Class 2 configuration per IEC standards
- Aluminium conductors: Solid or stranded Class 2 configuration
- Benefits: Optimized for current carrying capacity and mechanical flexibility
Conductor Screen
- Material: Semi-conducting cross-linkable compound
- Application: Extruded layer directly over conductor
- Function: Ensures uniform electric field distribution and reduces electrical stress
Insulation System
- Primary Options:
- XLPE (Cross-Linked Polyethylene): Superior thermal and electrical properties
- EPR (Ethylene Propylene Rubber): Enhanced flexibility and temperature resistance
- Performance: Excellent dielectric strength and long-term stability
- Temperature Rating: High continuous operating temperature capability
Insulation Screen
- Construction: Extruded semi-conducting cross-linkable compound
- Application: Applied directly over primary insulation
- Function: Controls electric field at insulation/metallic layer interface
Metallic Layer (Fault Protection)
- Configuration Options:
- Copper tape wrapping
- Concentric copper wire layer
- Combination of copper tapes and wires
- Function: Fault current path and electromagnetic shielding
Over Sheath (Outer Protection)
- Standard Options:
- PVC: Cost-effective, good chemical resistance
- MDPE: Enhanced mechanical properties and environmental resistance
- Premium Option:
- LSZH (Low Smoke Zero Halogen): Fire-safe applications with reduced toxic emissions
Key Performance Features
Electrical Performance
- High dielectric strength for reliable insulation
- Low power losses with optimized conductor design
- Excellent impulse voltage withstand capability
- Superior partial discharge resistance
Mechanical Properties
- Robust construction for demanding installation conditions
- Excellent tensile strength and flexibility
- Resistance to mechanical damage during installation
- Long-term stability under operational stresses
Environmental Resistance
- UV resistance for outdoor applications
- Chemical resistance to industrial environments
- Moisture resistance for underground and submerged installations
- Temperature stability across wide operating range
Safety Features
- LSZH option available for fire-sensitive applications
- Metallic screening provides fault protection
- Complies with international safety standards
- Low flame propagation characteristics
Installation Advantages
- Versatile mounting: Suitable for multiple installation methods
- Reduced installation time: Single core design simplifies routing and termination
- Flexible configuration: Adaptable to various system layouts
- Standard termination: Compatible with industry-standard accessories
Quality Assurance & Standards
- International Compliance: BS 6622, IEC 60502-2 standards
- Fire Performance: BS 7835 compliance for LSZH variants
- Quality Testing: Comprehensive electrical, mechanical, and environmental testing
- Certification: Third-party testing and certification available
Selection Guide
| Application | Recommended Construction | Key Benefits |
|---|---|---|
| Indoor Substations | XLPE/PVC or XLPE/LSZH | Fire safety, space efficiency |
| Industrial Plants | XLPE/PVC, Copper conductor | High current capacity, durability |
| Underground Installation | XLPE/MDPE | Moisture resistance, longevity |
| Water Crossings | EPR/MDPE | Enhanced water resistance |
| Cable Tray Systems | XLPE/LSZH | Fire safety, easy installation |
Technical Support
Our engineering team provides comprehensive support for:
- Cable selection and sizing calculations
- Installation method recommendations
- Accessories and termination guidance
- Custom specifications for specialized applications