Main busbar is the primary electrical conductor that distributes high-current power within industrial power distribution units.
A main busbar is a rigid copper or aluminum conductor system designed to carry and distribute large electrical currents (typically 100A to 5000A) within power distribution units. It serves as the central backbone for power transmission, connecting incoming power sources to outgoing distribution circuits through tap-off points. Main busbars feature low-impedance design with optimized cross-sectional geometry to minimize voltage drop and thermal losses during high-current operation.
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Copper busbars offer better conductivity (∼60% higher than aluminum), lower thermal expansion, and superior corrosion resistance but are heavier and more expensive. Aluminum busbars are lighter and more cost-effective but require larger cross-sections for equivalent current capacity and need special jointing techniques to prevent galvanic corrosion.
Busbar sizing considers continuous current rating (based on temperature rise limits), short-circuit withstand capability, voltage drop requirements, and mechanical strength. Key calculations include cross-sectional area (A = I × √t / K where K is material constant), thermal stress during faults, and natural frequency to avoid resonance with power frequency harmonics.
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CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。
说明目标数量、应用场景、交期和关键技术要求，用于准备 RFQ 或供应商评估。