Overview
Rectangular copper busbars are flat, solid conductors designed for efficient power transmission in electrical systems. They serve as the backbone of power distribution networks, offering superior performance compared to cables in high-current applications. These busbars are particularly valued in grounding systems (as referenced in the Chinese name) due to copper's excellent conductivity and corrosion resistance. Their rectangular shape maximizes surface area for connections while minimizing space requirements in panel boards and switchgear.
Structure and Working Principle
The busbar consists of solid copper formed into precise rectangular cross-sections, typically ranging from 30×5mm to 200×10mm for industrial applications. The working principle relies on copper's atomic structure which allows nearly unimpeded electron flow. Key structural considerations include edge rounding (to prevent corona discharge) and surface treatments (like tin plating) to prevent oxidation. For grounding applications, the busbar often features multiple drilled holes for secure bolted connections to equipment and earth electrodes.
Key Features
Electrical conductivity of 100% IACS (International Annealed Copper Standard) ensures minimal energy loss during transmission. Thermal conductivity (401 W/m·K at 20°C) allows effective heat dissipation under load. Mechanical properties include tensile strength of 200-250 N/mm² and excellent fatigue resistance. The rectangular profile provides optimal current density distribution, with skin effect being less pronounced than in round conductors at power frequencies.
Application Areas
Primary applications include electrical substations (as grounding buses and interconnections), industrial plants (for main power distribution), and data center power systems. They're mandatory in high-fault-current installations where reliable grounding is critical. Specialized uses include naval vessels, where tinned copper busbars resist saltwater corrosion, and renewable energy systems like solar farms where they connect inverters to transformers. Underground variants feature additional insulation for subway power networks.
Maintenance and Precautions
Regular inspection should check for discoloration (indicating overheating), loose connections, and surface oxidation. Annual torque checks on bolted joints are recommended to maintain proper contact pressure. Installation precautions include using compatible hardware (copper or brass bolts), applying antioxidant compound at joints, and maintaining minimum bending radii (typically 2× thickness for cold bending). In seismic zones, flexible connections should be used to accommodate movement.
B2B Procurement Guide
Industrial buyers should specify: 1) Dimensions (width × thickness × length), 2) Temper (hard-drawn for rigidity or annealed for flexibility), 3) Surface finish (bare, tinned, or silver-plated), and 4) Standards compliance (ASTM B187 for solid copper). Quality verification includes mill test certificates for copper purity (≥99.9%) and conductivity tests. For large projects, consider manufacturers with CNC punching/bending capabilities for custom shapes. MOQs typically start at 500kg, with lead times of 2-4 weeks for standard sizes.
Related Manufacturers
- 主营：直角紫铜排、高强镀锌板、工业装饰管、钢结构维护板
- 主营：铝合金管、纯铝管、纯铝排、镀锡铜排、铜排、紫铜排、圆角铜排、打孔铜排、接地铜排、大口径铜管、铜板、T2铜排、空调铜管、铜管、6061铝管、铝母线、7075铝管、航空铝管、无缝铝管、合金铝管、中空玻璃毛细管、厚壁铝管、铝板、铝棒、2A12铝管
- 主营：扁铜管、纯铜带、铜阀门、黄铜板、磷铜排、黄铜带、红铜丝、t2小铜条、t2紫铜板、t2裸铜线、t2紫铜管、紫铜连接、装饰铜板、车削铜棒、铜排卷圆、导电铜棒、厚壁铜管、接地铜棒、h62黄铜管、h62黄铜排、止水铜卷、红铜弯管、tu1紫铜带、波纹管、空调弯头
- 主营：浸塑铝排铝片、汽车零部件浸粉、五金件包胶、浸塑铜排铜钯、硬铜排、软铜排、铜编织导电带、热熔铜带软连接、铜编织线软连接、铜箔软连接、铜跨接片、接地线、铜绞线软连接、电池连接片定制、不锈钢编织线、跨接线、铝箔伸缩软接、铝编织线、端子线、电子连接线
- 主营：铜管、铜排、铜棒、铜带/铜箔、铜绞线、包塑铜管、医用铜管、紫铜管件
- 主营：PVC浸塑加工、PVC浸塑液、浸塑加工、铜排浸塑、PVC铜排浸塑、新能源铜排浸塑、五金件浸塑、浸塑加工厂家、环氧树脂浸塑加工
- 主营：铜覆钢扁钢、铜覆圆钢、铜覆钢接地棒、离子接地极、接地引出装置、铜端子、镀铜扁钢、镀铜接地棒、镀铜圆钢、镀锡铜扁钢、镀锡铜圆钢、镀锡铜接地棒、铜覆钢棒、镀铜圆管、铜排、热熔焊模具、焊粉
- 主营：接地模块、离子接地极、铜包钢接地棒、镀铜扁钢、石墨接地线、不锈钢包钢接地线、镀铜圆线、石墨基柔性接地体、碳凝接地电极、焊接模具夹、降阻剂
- 主营：镀锌板、彩涂卷、彩涂板、紫铜排、紫铜管、空调铜管、光亮镀锡铜排、等边角钢、Q355B槽钢、Q355CH型钢、工字钢、锌铝镁光伏支架、不等边角钢、热轧角钢、Q235B镀锌槽钢、镀锌花纹板、Q235B镀锌方管、镀锌方矩管、太阳能光伏支架、镀铝锌彩涂卷、锌铝镁檩条、镀锌角钢、T型钢、42CrMo圆钢、镀铝锌板
- 主营：sa675gr70、f11圆钢、f92圆钢、t3紫铜排、f51圆钢、f91圆钢、34crnimo6、60si2crva、30crmntih、20crnimoa、b16圆钢、20crmnmoa、25#圆钢、30crnimo8、17crnimo6、h13圆钢、f53圆钢、f52圆钢、30crmnsia、40crmnmoa、f55圆钢、a36圆钢、f22圆钢、20crni2mo、f60圆钢、35crmnsia
- 主营：纯铝丝、耐磨板、铝型材、纯铜排、黄铜排、黄铜管、紫铜带、磷铜线、红铜棒、红铜管、紫铜卷、黄铜板、黄铜棒、红铜带、紫铜排、紫铜棒、铝方管、防腐蚀、口琴管、生锈剂、铝棒材、铝制品、纯铝板、硬铝棒、耐候钢
- 主营：电抗器、变频器、调压器、稳压器、矿用干式变压器、矿用油浸式变压器、矿用一般型高压开关柜、矿用一般型低压开关柜、10kv线路调压器、矿用防爆变压器、干式电力变压器、油浸式电力变压器、大电流变压器、水冷变压器、隔离变压器、大电流发生器、进出线电抗器、加热变压器、三相调压器
- 主营：铝棒、铝板、铝管、铜棒、铜线、钨铜、纯钨、钼合金、钛合金、高温合金
- 主营：铝合金材料、304不锈钢带、TA1纯钛板、铬锆铜、黄铜排、磷铜皮、磷铜丝、铍铜箔、紫铜带、铜合金材料、H59黄铜板、C1100紫铜板、铝青铜板、C18150铬锆铜板、C5210磷铜板、锡青铜板、T2紫铜板、H65黄铜带、洋白铜带、H65黄铜管、无氧铜管、301不锈钢板、316不锈钢带、304不锈钢管、1100纯铝带
- 主营：紫铜排、紫铜管、紫铜棒、紫铜板、止水铜板、紫铜带、铜软连接、空调铜管、黄铜排、黄铜管、黄铜板、黄铜带、覆塑铜管、t2紫铜排、铜母线、机房铜排、电工铜排、红铜管、冷媒铜管、汇流铜排、异形铜排、接地铜排、地铁铜排、铝排、模具焊药
- 主营：紫铜管、紫铜板、紫铜排、紫铜棒、紫铜丝、空调铜管、镀锌铜排、接地铜排、紫铜带、黄铜管、黄铜板、黄铜排、黄铜带、紫铜线、镀锡铜母线、T2紫铜排、铜包铝排、T2紫铜板、T2紫铜棒、TP2脱脂铜管、紫铜带加工、TMY镀锡铜母线、机房汇流铜排、紫铜管折弯加工、H65黄铜棒
- 主营：6063铝板、6061铝管、LY12铝板、T2铜排、T2紫铜管、T2紫铜带、导电紫铜管、镀锡铜排、T2止水铜板、空调铜管、薄壁紫铜管、TU2汇流铜排、TU2铜母线、空调用紫铜管、紫铜盘管、T2紫铜板、T2紫铜棒、TU2接地铜棒、H62铜排、H85黄铜排、H59黄铜板、镀锡黄铜排、LY12铝管、5A06合金铝管、铝合金管
- 主营：铜扁条、纯铜排、铜母线、接地线、紫铜排、地铁铜排、实心铜条、水冷铜排、铜排定制、矩型铜排、导电铜排、导电铜条、异形铜排、环保铜排、软态铜排、镀锡铜排、接地铜排、镀镍铜排、变压器铜排、大规格铜排、母线槽、导电器材、开关装置
- 主营：紫铜管、紫铜排、紫铜棒、紫铜板、紫铜带、空调铜管、镀锡铜排、接地铜排、黄铜管、黄铜板、黄铜排、镀锡铜鼻子、铜接线端子、T2紫铜板、TU2导电紫铜带、T2紫铜棒、扁孔铜排、紫铜管折弯、锡青铜套、铜排软连接、铜包铝扁线、T3紫铜板、T2紫铜排、OT铜鼻子、T2接地紫铜排