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Conductive copper busbar (conductive copper bar)
1) Production Grades: T1, T2, TU1, TU2; chemical composition follows GB/T5231-2001 standard.
The main component of copper busbars is: Main Components of Conductive Copper Bars as shown in Table 1.
Copper Bars T1, T2, TU1, TU2
Cu+Ag 99.95 99.90 99.97 99.95
2) Product Status: Table 2 - Conductive Copper Busbar Product Status
Product Name & Code Status Symbol Supply Method
Copper Busbars (TMR) - Soft R Rolling Supply
Copper busbar (TMY) Hard-state Y-shaped bar supply
3) Product size range: 1. Conductive copper bar cross-section
Thickness a, Width b, Radius of Curvature r
Copper busbar current-carrying capacity table:
National Standard Copper Busbar Current Load Estimation Method: - Estimation Method: Single copper busbar current load = width (mm) x thickness coefficient - Double busbar current load = width (mm) x thickness coefficient x 1.5 (experience coefficient) - Copper and aluminum busbars can also be calculated by area, typically copper at 5-8A/square, aluminum at 3-5A/square. - Common Copper Busbar Current Load Calculation: - At 40°C, copper busbar current load = width x thickness coefficient - Width (mm); thickness coefficient for 12mm thick busbar is 20; for 10mm thick, it's 18; and so on: [12-20, 10-18, 8-16, 6-14, 5-13, 4-12]. - Double-layer copper busbar [40°C] = 1.56-1.58; Single-layer copper busbar [40°C] (determined by cross-sectional size); 3-layer copper busbar [40°C] = 2; 4-layer copper busbar [40°C] = single-layer copper busbar [40°C] x 2.45 (not recommended, use shaped busbars instead); copper busbar [40°C] = copper busbar [25°C] x 0.85; aluminum busbar [40°C] = copper busbar [40°C] / 1.3. - For example, the current load of TMY100*10 is: - Single-layer: 100 x 18.8 = 1800(A) [manual check = 1860A]; - Double-layer: 2(TMY100*10) current load = 1860 x 1.58 = 2940(A) [manual check = 2942A]; - Triple-layer: 3(TMY100*10) current load = 1860 x 2 = 3720(A) [manual check = 3780A]. - All calculations are precise and very close to the manual data.
