『Calculation formula for 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)
What is the current carrying capacity of copper bars? How to calculate? Summary of formulas for calculating the current carrying capacity of copper bars. Formula 1: Current carrying capacity of a single circle and a copper busbar=width (mm) X thickness coefficient. Double mother row orange cautious current carrying capacity=width (mm) X thickness coefficient X 1.5 (empirical coefficient). Copper bars and aluminum bars can also be measured by square meters, usually copper should be measured by 5-8A/square meter, and aluminum should be measured by 3-5A/square meter. At 40 ℃, the current carrying capacity of the copper busbar is equal to the width of the busbar multiplied by the thickness coefficient. Row width (mm); The thickness coefficient is: when the thickness of the mother row shed is 12, it is 20; When the thickness is 10, it is 18; In order: [12-20, 10-18, 8-16, 6-14, 5-13, 4-12]. Formula 2: Double layer copper bar [40 ℃]=1.56-1.58 Single layer copper bar [40 ℃] (depending on the cross-sectional size) 3 layer copper bars [40 ℃]=2 Single layer copper bars [40 ℃]. Copper bar [40 ℃]=Copper bar [25 ℃] * 0.85; Aluminum bar [40 ℃]=copper bar [40 ℃]/1.3. 4-layer copper busbar [40 ℃]=single-layer copper busbar [40 ℃] * 2.45 (this type of selection is not recommended, it is best to use a non-standard busbar instead). Formula 3: Single layer: 100 * 18=1800 (A); Double layer: The current carrying capacity of 2 (TMY100 * 10) is 1860 * 1.58=2940 (A); The current carrying capacity of layer 3 (TMY100 * 10) is 1860 * 2=3720 (A). 2. Calculation formula for current carrying capacity of wires and cables
The calculation formula for current carrying capacity of wires and cables is: maximum current carrying capacity=ca
1. Cable Material and Allowable Maximum Current Density Copper Conductor: The safe current carrying capacity is generally 5~8A/mm ². Aluminum wire: The safe current carrying capacity is generally 3-5 A/mm ². These values are determined based on factors such as the material properties of the wire, the maximum allowable operating temperature, and heat dissipation conditions.
Example of current carrying capacity calculation: Copper wire: 2.5mm ² BVV Copper wire: Safe current carrying capacity=2.5mm ² × 8A/mm ²=20A (recommended value).
. 4mm ² BVV copper wire: safe current carrying capacity=4mm ² × 8A/mm ²=32A (recommended value). Aluminum wire (assuming maximum allowable current density of 4A/mm ²): 2.5mm ² Aluminum wire: Safe current carrying capacity=2.5mm ² × 4A/mm ²=10A. 3. Calculate the cross-sectional area of the wire based on the load current. Using the recommended safe current carrying capacity of the copper wire, the upper and lower range of the required cross-sectional area of the copper wire can be calculated: S=0.125I~0.2I (mm ²) S: cross-sectional area of the copper wire (mm ²) I: load current (A). For example, if the load current is 20A, the required cross-sectional area range of the copper wire is S=0.125 × 20~0.2 × 20=2.5mm ²~4mm ². 4. Power calculation and current estimation. Resistive load: P=UIP: power (W) U: voltage (V) I: current (A) Inductive load (such as sunlight) Lamp: P=UIcos ф cos ф: Power factor (cos ф=0.5 for fluorescent lamp load, 0.8 for household appliances) For example, if the total power of the household is 6000W, the voltage is 220V, and the power factor is 0.8, then the ma
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