Introduction

8.7/15kV single core copper conductor power cable is a medium-voltage power cable specifically designed for power transmission and distribution systems operating at a rated voltage of 8.7/15kV. The cable uses a high-conductivity copper conductor and advanced XLPE insulation technology to provide excellent electrical performance, high current-carrying capacity, superior thermal stability, and long service life. It is widely used in substations, industrial plants, commercial buildings, renewable energy projects, urban power grids, and underground transmission systems, providing a safe, efficient, and reliable solution for modern power infrastructure.

As the demand for stable and efficient electricity transmission continues to increase, copper conductor power cables remain one of the most preferred solutions for medium-voltage networks because of their excellent conductivity, superior mechanical strength, and outstanding reliability. Compared with aluminum conductor cables, copper cables offer lower electrical resistance and higher current-carrying capacity, making them particularly suitable for applications that require maximum electrical efficiency and long-term operational stability.

Product Construction

The 8.7/15kV single core copper conductor power cable is composed of several carefully designed layers to ensure safety, reliability, and long service life.

Copper Conductor

The conductor is manufactured from high-purity annealed copper wires that are stranded together to provide excellent flexibility and conductivity. Copper possesses one of the highest electrical conductivities among engineering metals, ensuring minimal energy loss during power transmission.

Conductor Screen

A semi-conductive conductor screen is applied over the copper conductor to create a uniform electric field and eliminate air gaps that could lead to partial discharge.

XLPE Insulation

Cross-linked polyethylene (XLPE) insulation is widely used because of its excellent dielectric strength, low dielectric losses, and outstanding thermal resistance. The insulation can continuously operate at conductor temperatures of up to 90°C and withstand short-circuit temperatures up to 250°C.

Insulation Screen

The semi-conductive insulation screen controls the electric field distribution around the insulation and significantly improves the operational reliability of the cable.

Metallic Screen

Copper wires or copper tape are usually used as the metallic screen. The screen safely carries fault currents and provides protection against electrical disturbances.

Outer Sheath

The outer sheath is generally made from PVC or polyethylene materials. It provides excellent resistance to moisture, chemicals, ultraviolet radiation, abrasion, and environmental aging.

Main Technical Characteristics

• Rated voltage: 8.7/15kV
• Rated frequency: 50Hz or 60Hz
• Maximum conductor operating temperature: 90°C
• Maximum short-circuit temperature: 250°C for five seconds
• Installation temperature: not lower than 0°C
• Minimum bending radius: fifteen times the cable diameter
• Excellent electrical conductivity
• High current-carrying capacity
• Low electrical resistance
• Excellent thermal stability
• Outstanding mechanical strength
• Long service life exceeding thirty years.

Advantages of Single Core Copper Conductor Power Cable

Excellent Conductivity

Copper has very low electrical resistance and excellent conductivity, minimizing transmission losses and improving overall system efficiency.

High Current Carrying Capacity

Copper conductors can carry higher current levels than equivalent aluminum conductors, making them suitable for heavy-duty industrial applications.

Superior Mechanical Strength

Copper offers excellent tensile strength and resistance to mechanical stress, ensuring reliable performance even under demanding installation conditions.

Outstanding Reliability

Copper conductor cables maintain stable electrical performance over long operating periods and require minimal maintenance.

Better Connection Performance

Copper provides excellent compatibility with cable accessories, terminals, and connectors, reducing contact resistance and improving system safety.

Excellent Heat Resistance

Copper conductors perform well under elevated temperatures and can withstand temporary overload conditions more effectively.

Applications

The 8.7/15kV single core copper conductor power cable is widely used in:

• Electrical transmission and distribution systems
• Urban power grids
• Transformer substations
• Industrial manufacturing facilities
• Power generation plants
• Commercial buildings
• Petrochemical industries
• Mining operations
• Renewable energy projects
• Solar power stations
• Wind farms
• Underground cable systems
• Airports and railway systems
• Data centers
• Hospitals and public facilities
• Water treatment plants
• Infrastructure construction projects.

Installation Recommendations

For reliable and long-term operation, the following installation guidelines should be followed:

1. Avoid excessive bending during installation.
2. Protect the cable from mechanical damage.
3. Ensure proper grounding of the metallic screen.
4. Maintain adequate spacing between adjacent cables.
5. Prevent moisture from entering cable joints and terminations.
6. Use approved cable accessories and connectors.
7. Follow all local electrical standards and safety regulations.

Proper installation significantly extends cable service life and improves system reliability.

Maintenance and Service Life

Under normal operating conditions, the 8.7/15kV single core copper conductor power cable can provide more than thirty years of reliable service. Routine inspection and preventive maintenance further improve operational safety and reduce the possibility of unexpected failures.

Recommended maintenance procedures include:

• Visual inspection of cable routes.
• Insulation resistance testing.
• Infrared thermal imaging inspections.
• Grounding system verification.
• Inspection of joints and terminations.
• Periodic electrical testing.
• Preventive maintenance and system monitoring.

Early detection of potential issues through regular maintenance can greatly improve the reliability and service life of the entire electrical system.

Conclusion

The 8.7/15kV single core copper conductor power cable is a highly reliable, efficient, and durable solution for medium-voltage power transmission and distribution systems. Its superior conductivity, high current-carrying capacity, excellent mechanical strength, and long service life make it one of the most widely used cable products in modern electrical engineering. As the demand for safe and efficient power infrastructure continues to increase, copper conductor power cables will remain an essential component of global electrical transmission networks.