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For the low-voltage cable project of African customers, it is used for local infrastructure construction. Low-voltage cables have a wide range of applications, such as road traffic, street lighting systems, television broadcasting, communication, and other fields, enabling equipment interconnection and remote monitoring.

Overhead bare conductors are indispensable key components in power transmission and distribution systems.South African customers have made significant purchases of overhead cables for local power generation construction. Due to the complex terrain and harsh climatic conditions, conductors with high mechanical strength and good corrosion resistance are required. Composite conductors such as steel-cored aluminum stranded wires are ideal choices. Overhead bare conductors are prone to corrosion when exposed to the air for extended periods. Aluminum alloy conductors have improved corrosion resistance through alloying, while steel-cored aluminum stranded wires prevent corrosion through galvanizing treatment of the steel core.

Overhead insulated cables are usually superior to bare wires in terms of overall economy, especially in scenarios where safety and cost need to be balanced. However, if only the initial investment is considered and the environmental risk is low, bare wires may be more economical. The following is a specific analysis: Economic advantages of overhead insulated cables Reduce maintenance costs: The insulation layer of overhead insulated cables can effectively reduce external damage (such as tree branch contact, flying objects, metal films, etc.), thereby reducing the incidence of short circuits and grounding accidents. According to statistics, using overhead insulated cables can reduce the failure rate by 4-6 times compared to bare wires, significantly reducing maintenance workload and power outage losses. Extended service life: The insulation layer protects the cable from environmental corrosion and mechanical wear, extending the service life of the cable. Although the initial investment of overhead insulated cables is higher than that of bare conductors, in the long run, their overall cost is lower. Simplify line structure: Overhead insulated cables can simplify the structure of line towers and even be laid along walls, saving line materials and land occupation costs. In addition, it can also narrow the route corridor and reduce land acquisition costs. Improving power supply reliability: Overhead insulated cables can reduce accidents caused by external forces and enhance the reliability and stability of power supply. This helps to reduce economic losses caused by power outages and improve the economic efficiency of power supply enterprises. Economic advantages of bare wires Low initial investment: Bare wires have no insulation layer, resulting in relatively low material and manufacturing costs. Therefore, in terms of initial investment, bare wires have significant advantages. Suitable for specific scenarios: In areas with stable climate and low risk of external damage, the economic viability of bare wires is more prominent. For example, in open rural areas or high-voltage transmission lines, bare conductors are a more economical choice.

I. Definition and Characteristics A bare conductor is an uninsulated conductor, typically made of metals such as copper, aluminum, steel, or their alloys, and exposed to the air. Its core characteristics include:   1. High conductivity: The metal material (such as copper and aluminum) ensures efficient current transmission.   2. No insulation: Unlike cables, bare conductors rely on external structures or the environment for insulation.   3. Diversified structures: Bare conductors can be processed into wires, ribbons, flat sheets, and other shapes to meet different application requirements. II. Classification and Application Bare conductors can be divided into three categories based on their shape and purpose:   1. Round Wire Varieties: Round copper wire, round aluminum wire, tinned round copper wire, copper-clad steel round wire, etc. Application: Serves as the conductive core of wires and cables. Special applications (such as high-frequency communications) use silver-plated copper-clad steel wire, taking advantage of its high-frequency, low-loss properties. 2. Profiled Wire Varieties: Busbars: Copper busbars, aluminum busbars (rectangular, trough, and tubular). Tramway Wires: Copper tramway wires, steel-aluminum tramway wires (used in electrified railways). Flat Wires: Flat copper wires, flat aluminum wires (for motor and electrical coils). Application: Busbars: Busbars are used for centralized power distribution. Overhead lines: Profiled wires (such as aluminum alloy tramway wires) support high current transmission. Motors/Electric Appliances: Flat wires are used for winding coils, while tubular conductors are used for high-voltage applications. 3. Flexible Wiring Varieties: Copper brush wire, copper stranded wire, copper braided wire, etc. Features: Soft, vibration-resistant, and easily bendable. Applications: Brush connections: Flexible connections for motors and batteries. Communication antennas: Overhead antennas require lightweight and stable conductivity. Grounding wires: Flexible adaptation to equipment layout.

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