Copper Clad Aluminum Bimetallic Bus bar

Copper-clad aluminum busbar, also known as CCA busbar and bimetal conductive bar, is the third generation of "new energy-saving conductor material" after copper and aluminum. It is a conductive material commonly used in power transmission and distribution systems. It consists of an aluminum core wrapped in a copper layer. The copper-clad aluminum busbar combines the advantages of copper and aluminum, with high electrical conductivity and low weight.

Copper clad aluminum busbar

Chalco can customize copper-clad aluminum busbars of various sizes and supply them to one of the world-renowned power company suppliers such as SIEMENS, HITACHI (ABB), TOSHIBA, LEGRAND, EATON, etc.

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Copper clad aluminum busbar /CCA busbar specifications

Copper material	T2
Aluminum material	1050/1060/1070/1100
Temper	H28/H26/H24/O
Copper-aluminum composite ratio (%)	10%/15%/20%/25%/30%/35%
Thickness (mm)	3.0mm~120mm
Width (mm)	10mm~250mm
Length (mm)	1000mm/2000mm/3000mm
Production standard	GB/T 30586-2014, ASTM B1005 − 17
Remarks:	The above specifications are for reference, special specifications can be customized

Copper clad aluminum busbar /CCA busbar size deviation

Thickness/mm	Thickness Tolerance/mm	Width/mm	Width Tolerance/mm
＞3.00～6.00	±0.10	≤30.00	±0.50
＞6.00～10.00	±0.15	＞30.00～100.00	±0.80
＞10.00	±0.20	＞100.00	±1.20

Copper clad aluminum busbar /CCA busbar chemical composition

The copper layer of the copper-clad aluminum busbar is made of T2 copper or C11000, the chemical composition

Element	Composition
（Cu）	99.9
（P）	<0.015
（Pb）	<0.005
（Zn）	<0.005
（Fe）	<0.005
（Sn）	<0.002

The core layer of the copper-clad aluminum busbar is made of 1000 series pure aluminum, commonly used are 1050, 1060, 1070, 1100, etc., the chemical composition

Element (%)	Composition (%)
Element (%)	1050	1060	1070	1100
（Al）	99.5	99.6	99.7	99
（Si）	0.25	0.25	0.2	0.95
（Fe）	0.4	0.35	0.25	0.7
（Cu）	0.05	0.05	0.04	0.05
（Mn）	0.05	0.03	0.03	-
（Zn）	0.05	0.05	0.04	0.1
（Ti）	-	-	-	0.2
Other	0.15	0.15	0.15	0.15

Bimetal conductive busbar room temperature physical properties

Coating layer volume ratio/%	Temper	Density (g/cm3)	interface bonding strength/MPa	Tensile strength/MPa	Elongation/%	Maximum DC resistance (Ω·mm2/m)	volume conductivity not less than (%IACS)	Brinell Hardness HB
20%	H28	3.94	≥40	≥220	≥3	0.02596	66.4%	≥80
	H26		≥40	≥190	≥7	0.02596	66.4%	65-75
	H24		≥40	≥160	≥12	0.02596	66.4%	50-60
	O		≥40	≥110	≥25	0.0255	67.6%	20-30
25%	H28	4.25	≥40	≥230	≥3	0.02548	67.7%	≥80
	H26		≥40	≥200	≥8	0.02548	67.7%	65-75
	H24		≥40	≥170	≥16	0.02548	67.7%	50-60
	O		≥40	≥115	≥30	0.02498	69%	20-30
30%	H28	4.56	≥40	≥230	≥3	0.02477	69.6%	≥80
	H26		≥40	≥200	≥8	0.02424	72.4%	65-75
	H24		≥40	≥170	≥16	0.02498	72.4%	50-60
	O		≥40	≥115	≥30	0.02477	71.1%	20-30
35%	H28	4.87	≥40	≥230	≥3	0.02424	72.4%	≥80
	H26		≥40	≥200	≥8	0.02498	72.4%	65-75
	H24		≥40	≥170	≥16	0.02477	72.4%	50-60
	O		≥40	≥115	≥30	0.02424	74.1%	20-30

CCA busbar specification and AC ampacity reference table

The AC ampacity of a single product is shown in the table below, and the DC ampacity should be increased appropriately by referring to the table below.

The data in the table below are indoor test data, without considering the influence of outdoor factors such as wind speed.

The data in the table is the AC current carrying capacity when the sample is placed vertically without coating. When the sample is placed flat, when the width is ≤60.00mm, the data in the table should be multiplied by 0.95; when the width is >60.00mm, the data in the table should be multiplied by 0.92.

The product works stably in an environment of 25°C, and the AC ampacity when the temperature rise is 50K, 65K and 75K.

To learn about the current carrying capacity of different specifications, you can download the PDF. If you want to know more about copper-aluminum composite busbar products, please contact Chalco aluminum, and we will provide you with a good solution.

Size（W×T）mm×mm	Current carring capacity（25℃）/A
	VPCu=20%			VPCu=25%			VPCu=30%
	50K	65K	75K	50K	65K	75K	50K	65K	75K
15.00×4.00	193	213	222	196	210	225	200	213	229
20.00×4.00	250	276	288	254	273	293	259	277	298
25.00×4.00	310	341	355	314	339	363	321	345	370
30.00×4.00	326	361	375	336	362	387	347	372	399
30.00×5.00	425	453	476	438	453	489	450	466	503
30.00×6.00	486	538	562	499	539	579	514	554	595
30.00×8.00	579	643	678	596	644	697	613	662	717
30.00×10.00	638	711	724	658	712	745	676	733	767
40.00×4.00	453	498	517	465	500	532	479	513	547
40.00×5.00	538	604	633	554	605	652	570	622	670
40.00×6.00	612	677	708	630	679	728	649	698	750
40.00×8.00	725	805	847	746	806	873	767	829	897
40.00×10.00	790	894	949	814	896	977	837	921	1005
50.00×5.00	665	735	765	684	736	788	703	758	810
50.00×6.00	755	836	872	777	836	898	799	861	923
50.00×8.00	891	989	1042	918	990	1072	944	1019	1103
50.00×10.00	969	1061	1107	998	1061	1139	1026	1092	1172
60.00×5.00	759	856	892	781	858	918	804	882	945
60.00×6.00	861	952	995	886	953	1025	911	980	1053
60.00×8.00	1011	1123	1182	1041	1124	1216	1070	1156	1252
60.00×10.00	1093	1215	1279	1125	1218	1318	1157	1253	1355
80.00×6.00	1081	1197	1250	1113	1198	1287	1145	1232	1323
80.00×8.00	1265	1405	1479	1302	1407	1523	1340	1448	1566
80.00×10.00	1362	1505	1583	1402	1507	1629	1442	1550	1676
100.00×6.00	1283	1419	1483	1320	1422	1527	1358	1462	1571
100.00×8.00	1504	1669	1758	1548	1672	1811	1593	1719	1862
100.00×10.00	1620	1790	1883	1668	1793	1938	1716	1844	1993
120.00×8.00	1740	1932	2035	1791	1935	2095	1842	1990	2154
120.00×10.00	1890	2090	2197	1946	2094	2261	2002	2153	2326
140.00×8.00	1996	2216	2333	2054	2218	2402	2114	2282	2471
140.00×10.00	2199	2447	2556	2264	2452	2631	2329	2522	2706
160.00×8.00	2223	2468	2599	2289	2472	2660	2354	2543	2753
160.00×10.00	2449	2718	2846	2521	2730	2929	2594	2809	3014
180.00×8.00	2465	2736	2882	2538	2740	2967	2611	2819	3053
180.00×10.00	2717	3023	3157	2796	3029	3250	2877	3116	3343
180.00×12.00	2816	3156	3297	2902	3165	3398	2989	3258	3498
200.00×8.00	2701	2998	3157	2784	3007	3255	2866	3095	3330
200.00×10.00	2980	3317	3463	3069	3324	3566	3159	3422	3671
200.00×12.00	3093	3464	3627	3187	3474	3734	3282	3577	3840

The main application fields of copper clad aluminum busbar

Power transmission and distribution station: Copper-clad aluminum busbar is used to connect transformers, switchgear and power distribution equipment, and transmit electric energy to different power transmission and distribution stations.

Industrial field: In the industrial field, copper-clad aluminum busbars are often used to connect power equipment, machines, and power distribution systems in factories, such as generators, motors, and electrical control cabinets.

Architecture and Buildings: Copper-clad aluminum bus bars are used in power distribution and grounding systems in buildings and buildings, including commercial buildings, office buildings, residential buildings and public facilities.

New energy power station: In new energy power stations such as solar power generation and wind power generation, the copper-clad aluminum busbar is used to connect the power transmission between the generator set, the converter and the grid.

Electric vehicle charging facilities: With the popularity of electric vehicles, copper-clad aluminum busbars play an important role in electric vehicle charging facilities, used to transmit power to charging piles and charging equipment.

Electronic communication equipment: Copper-clad aluminum busbars are also used in electronic communication equipment, such as base stations, communication equipment and data centers, for power distribution and grounding systems.

It should be noted that the specific application areas may vary according to power requirements, system scale and design requirements. Therefore, in specific applications, appropriate busbar materials and specifications should be evaluated and selected according to actual conditions.

The main application fields of copper clad aluminum busbar

The price of copper clad aluminum busbar

Copper-clad aluminum bus bar price: (LME copper price + processing fee) x weight + packaging fee + transportation fee

The price of copper-clad aluminum bus bars will be affected by many factors, such as market supply and demand, copper raw material prices, processing costs, specifications, and other factors. Different manufacturers and suppliers may have different pricing strategies and price levels. In addition, it is also affected by factors such as currency exchange rate and international economic situation.

Therefore, please contact Chalco aluminum for inquiry, we will provide you with the best quotation and service.

Points to note when purchasing copper-clad aluminum bus bars

Material quality: Make sure to choose a reliable copper-clad aluminum busbar supplier or manufacturer to ensure that the material meets international standards and relevant specifications. Consider the reputation of the supplier and the product quality control system.

Composite ratio: Select a suitable composite ratio according to specific application requirements and technical requirements. Different compounding ratios may affect aspects such as electrical conductivity, current carrying capacity, and mechanical strength.

Dimensions: Choose appropriate dimensions according to actual needs, including thickness, width and length. Make sure the size selected meets the project requirements to ensure proper current carrying capacity and installation requirements.

Surface treatment: Consider the surface treatment of the copper-clad aluminum busbar, such as tin plating, silver plating or other anti-corrosion coatings. Surface treatments can improve electrical conductivity, extend service life and provide corrosion resistance.

Technical support: Cooperate with suppliers or manufacturers to obtain technical support and consultation. They can provide expert advice on product selection, installation guidance and performance evaluation.

Standard certification: ensure that the selected copper-clad aluminum busbar meets international standards and certification requirements, such as ASTM, EN, JIS, etc. Check relevant certification documents or product specification sheets to ensure that the product meets the required quality and performance standards.

Price and performance comparison: During the purchase process, comprehensively consider price, performance and quality for comparison and evaluation. Not only focus on price, but also consider the long-term reliability and performance requirements of the product.

Reference testimonials and experiences: Knowing the testimonials and experiences of other users or professionals with different brands and suppliers can help you make more informed choices.

How to produce double-sided copper-clad aluminum busbar?

The copper-aluminum composite busbar produced by Chalco is different from traditional production processes such as static pressure extrusion method, rolling crimping method, cladding welding method, sleeve rolling method, etc., and adopts the original "horizontal continuous casting-drawing method" - Rolling annealing high-efficiency forming technology enables the bonding interface of copper-aluminum composite busbars to achieve a certain metallurgical bond, enhances the shear strength of the two metal interfaces, ensures the mechanical and electrical properties of the product, and improves the stability of the product.

horizontal continuous casting-drawing method

Chalco-copper clad aluminum busbar quality assurance

The copper-aluminum composite row produced by Chalco will go through the following quality inspections to ensure that the product quality is qualified before delivery.

Quality inspection includes: salt spray test; eddy current conductivity test; metallographic microscope; spectral analysis; high and low temperature alternating experiment; Brinell hardness statistics; analytical balance;

Chalco-copper clad aluminum busbar quality assurance