『Calculation formula for aluminum busbar current carrying capacity』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. I would like to ask about the calculation formula for the current carrying capacity of copper bars and aluminum bars.
Current carrying capacity of rectangular busbars: At 40 ℃, the current carrying capacity of copper bars=width * thickness coefficient width (mm); The thickness coefficient is 20.5 when the busbar is 12 thick; When the thickness is 10, it is 18.5; In order: [12-20.5, 10-18.5, 8-16.5, 6-14.5, 5-13.5, 4-12.5] [Note]: According to Lyqs suggestion and further calculation, the original thickness coefficients of 20, 18, 16, 14, and 12 will be increased by 0.5 to make them closer. Double layer copper busbar [40 ℃]=1.56-1.58 Single layer copper busbar [40 ℃] (depending on the cross-sectional size) 3 layer copper busbar [40 ℃]=2 Single layer copper busbar [40 ℃] 4 layer copper busbar [40 ℃]=Single layer copper busbar [40 ℃] * 2.45; Double layer: The current carrying capacity of 2 (TMY100 * 10) is 1850 * 1.58=2923 (A); [Refer to manual as 2942A]; Three layers: The current carrying capacity of 3 (TMY100 * 10) is 1850 * 2=3700 (A) [according to the manual, it is 3780A]
2.150x10 aluminum row current carrying capacity list
Core conclusion: The current carrying capacity of 150 × 10 aluminum rows is about 5% -10% higher than that of flat rows, but it needs to be comprehensively judged based on the usage scenario and standard manual. The core influencing factors of aluminum busbar current carrying capacity calculation need to comprehensively consider installation method, environmental temperature, and heat dissipation conditions. In the upright state, due to the larger longitudinal contact area with air, the heat dissipation efficiency is usually increased by 5% -15%, and the corresponding curre
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3. Accurate data should be queried for standard query paths: • GB/T 5585.1-2018 "Copper, Aluminum and Their Alloy Busbars for Electrical Use" • DL/T 5222-2005 "Technical Regulations for the Selection and Design of Conductors and Electrical Appliances" or using the current carrying formula. Wheel state: I=K × S × √ t (K is the material coefficient/S is the cross-sectional area/t is the temperature rise). Deduction by oneself.
4. The necessity of professional verification. Important power engineering must undergo thermal stability verification and dynamic verification.
Stable verification, it is recommended to obtain a calculation model with operating condition correction factors from the electrical design institute to avoid relying solely on empirical parameters.3. Collection copper aluminum busbar current carrying capacity calculation method
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