Features of CCA bimetal busbar:
1. Unique composite performance, the copper-aluminum interface is a metallurgical bond, the product performance is high, and it has the characteristics of copper conductivity and low aluminum density;
2. High interface bonding strength, excellent electrical conductivity, and excellent machining performance;
3. The thickness of the copper layer is large and adjustable, suitable for transmitting large currents;
4. Light weight, convenient for transportation and installation; 5. Obvious economic benefits: save copper resources and reduce production costs.
| Name | Unit | Copper busbar | CCA bimetal busbar（VPcu=25%） | Aluminum busbar | |||
| Hard | Soft | Hard | Soft | Hard | Soft | ||
| Tensile strength | MN/m2 | - | ≥206 | ≥170 | ≥115 | ≥118 | ≥68.6 |
| Elongation | % | - | ≥35 | ≥3 | ≥28 | ≥3 | ≥20 |
| Maximum resistivity | Ω·mm2/m | 0.01777 | 0.017241 | 0.02548 | 0.02498 | 0.029 | 0.028264 |
| Minimum volume conductivity | %IACS | 97 | 100 | 67.7 | 69 | 59.5 | 61 |
| Density | g/cm3 | 8.89 | 8.89 | 4.25 | 4.25 | 2.703 | 2.703 |
| Coefficient of linear thermal expansion | 1/℃ | 17×1010-6 | 17×1010-6 | 22.5×1010-6 | 22.5×1010-6 | 23×1010-6 | 23×1010-6 |
| Temperature coefficient of resistance | 1/℃ | 3.81×1010-3 | 3.93×1010-3 | 3.9×1010-3 | 4.0×1010-3 | 3.93×1010-3 | 4.03×1010-3 |
Application of CCA bimetal busbar:
1. Electrical equipment manufacturing: mainly including low-voltage, medium-voltage, high-voltage power distribution, busbar systems, rectifiers, motor windings, etc.;
2. Crane rail supply system, vacuum switchgear, generator set, substation, bimetallic connector in aluminum foil winding transformer, etc.;
3. Wind power and solar photovoltaic fields: mainly including reactors, inverters, etc.;
4. Railway, aerospace, high-speed ferry, etc.
