HOME / Somali Tubular Busbar Standards

Article Overview

Somalia relies on the Somali Bureau of Standards (SOBS) for national certification, while tubular busbars typically follow international standards such as EN 755-2 for aluminium and IEC 61439 for low-voltage assemblies.

National Standards in Somalia

The Somali Bureau of Standards (SOBS) is the primary authority for standards certification in Somalia, overseeing product compliance, quality control, and technical specifications for industrial and electrical equipment . While SOBS does not publicly list a dedicated tubular busbar standard, manufacturers and engineers in Somalia are expected to adhere to recognized international standards when designing or installing busbars.

International Standards for Tubular Busbars

Aluminium Tubular Busbars

  • EN 755-2: Specifies aluminium alloy profiles, including mechanical strength, electrical conductivity, and dimensional tolerances . Common alloys include 6101B T6 (higher mechanical strength) and 6101B T7 (higher electrical conductivity).
  • Design Considerations: Busbar diameter and wall thickness are determined by thermal and mechanical loads, nominal current, short-circuit current, and support spacing . Aluminium tubular busbars are lighter, stiffer, and have a long lifespan compared to stranded conductors.

Low-Voltage Busbar Assemblies

  • IEC 61439: Covers design verification, thermal performance, and testing for low-voltage busbar assemblies up to 1000 V AC or 1500 V DC . It includes requirements for assembly drawings, technical specifications, and load calculations using diversity factors.

High-Voltage Busbars

  • Tubular busbars for 33kV, 66kV, and 132kV substations are available in both copper and aluminium, with accessories such as rigid, expansion, and tee connectors . Proper design ensures safe current distribution, mechanical stability, and compatibility with substation layouts.

Material and Design Considerations

  • Aluminium: Offers high conductivity, low weight, corrosion resistance, and recyclability .
  • Copper: Provides higher conductivity but is heavier and more expensive.
  • Tubular Design: Hollow profiles improve heat dissipation and reduce weight while maintaining current-carrying capacity .
  • Customization: Busbars can be welded or extruded to required lengths, with bespoke connectors available for specific substation designs .

Practical Guidance for Somalia

  • Consult SOBS for certification and compliance requirements before installation .
  • Use EN 755-2 and IEC 61439 as reference standards for design, material selection, and testing.
  • Ensure busbar dimensions, alloy choice, and support spacing meet both electrical load and mechanical stability requirements.
  • For high-voltage applications, coordinate with suppliers for appropriate connectors and accessories to match substation voltage ratings . By combining SOBS certification with internationally recognized standards, engineers in Somalia can ensure safe, reliable, and compliant tubular busbar installations.

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