Construction of Tubular Busbars for New Energy Power Plants
Tubular busbars in new energy power plants are typically constructed from aluminum or copper tubes, supported by insulators and structures, and installed according to strict standards to ensure safe, efficient, and modular power distribution.
Materials and Types
New installations generally use aluminum tubes for their lightweight, high conductivity, and corrosion resistance, while copper tubes are used for extensions to existing copper busbar systems or where higher conductivity is required . Tubular busbars can be insulated or open terminal systems, depending on voltage levels and environmental conditions, with insulated types commonly used for AC voltages up to 35kV . The busbar system may include main, branch, and down conductors to connect transformers, generators, and distribution panels .
Fittings and Connections
All fittings, clamps, and connectors must be compatible with the busbar material and designed to avoid deformation of the tube conductor . Sliding fittings use multiple clamps based on current rating, while fixed fittings always use at least two clamps for mechanical stability. For copper-to-aluminum connections, special transition measures are required to prevent electrochemical corrosion . Overlapping surfaces at joints are often silver-plated or tin-lined to ensure reliable electrical contact .
Support Structures and Insulators
Busbars are mounted on support insulators and structures that comply with technical specifications for voltage and mechanical loads, including wind and short-circuit forces . Supports and hangers must meet anti-corrosion requirements and maintain proper alignment, symmetry, and spacing for safety and aesthetics . The metal shielding layer of insulated busbars must be reliably grounded, with grounding points separated to prevent closed magnetic circuits .
Installation Guidelines
- Temperature compensation measures are applied to accommodate thermal expansion .
- Phase sequence and color coding (A: yellow, B: green, C: red) are maintained for three-phase AC systems .
- Clearances from pipelines, buildings, and other live installations must meet design requirements .
- Modular design allows for easier assembly, disassembly, and future expansion .
- Fire-proof and moisture-proof storage is required before installation .
Testing and Acceptance
After installation, tubular busbars undergo handover tests to verify insulation, continuity, and mechanical integrity . Compliance with national and international standards such as BS EN 61936-1, ENA TS 41-11 (aluminum), ENA TS 41-16 (copper), and DL/T 5789-2019 ensures safety and reliability .
Advantages in New Energy Plants
Tubular busbars provide high current capacity, reduced energy loss, mechanical strength, and modular flexibility compared to conventional cable systems . They are particularly suitable for renewable energy plants where compact, reliable, and expandable power distribution is critical. By following these material, design, and installation guidelines, tubular busbars can safely and efficiently interconnect generators, transformers, and distribution equipment in modern energy facilities.
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