Congo Tubular Busbar Standard

Tubular busbars in Congo typically follow international standards such as BS EN 61936-1, ENA TS 41-11/41-16, and IEC guidelines, with aluminium or copper conductors used depending on system requirements.

Materials and Conductor Types

Tubular busbars are hollow conductors designed for high current capacity, mechanical strength, and heat dissipation. Aluminium is commonly used for new installations due to its light weight, corrosion resistance, and recyclability, while copper is preferred for extensions to existing copper systems . Aluminium tubular busbars are typically rated for 1250 A or 2000 A continuous current, depending on design and cross-section .

Standards and Compliance

• BS EN 61936-1: Governs power installations exceeding 1 kV AC, covering short-circuit withstand, wind loading, and mechanical forces .
• ENA TS 41-11: Specifies aluminium tubular busbar fittings and assembly for open terminal systems .
• ENA TS 41-16: Covers copper tubular busbar fittings .
• IEC standards: Provide guidance for busbar trunking systems, including insulation, current rating, and mechanical design . These standards ensure safety, reliability, and compatibility with substation equipment and electrical networks.

Fittings and Installation

• Fittings: Use current-carrying half clamps for open terminal systems; sliding fittings require multiple clamps based on current rating, while fixed fittings always use two clamps for mechanical stability .
• Connections: Special care is required for copper-to-aluminium joints to prevent electrochemical corrosion .
• Support structures: Insulators and support brackets must comply with mechanical and electrical standards, ensuring proper spacing, alignment, and grounding .

Design Considerations

• Thermal management: Tubular design improves heat dissipation compared to solid bars .
• Mechanical strength: Hollow conductors provide high stiffness-to-weight ratio, suitable for outdoor substations and high-voltage applications .
• Customization: Extruded aluminium busbars can be tailored for geometry, surface area, and connection points to match equipment layout .

Practical Guidance for Congo

While Congo may not have a dedicated national tubular busbar standard, adopting international standards such as BS EN 61936-1, ENA TS 41-11/41-16, and IEC busbar guidelines is common practice. Local utilities or project specifications may reference these standards for substation design, installation, and inspection. Aluminium is often preferred for new installations, while copper is used for compatibility with existing systems . Following these standards ensures safe, efficient, and durable busbar installations suitable for Congo's electrical infrastructure.