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功率电流快速计算公式(国外英文资料)
功率电流快速计算公式(国外英文资料)
A formula for fast calculation of power current and the relation between conductor cross-sectional area and current
The current power calculation formula:
Three-phase motors:??? 2A/KW?
Three phase electric heating equipment: 1.5A/KW
Single phase 220V, 4.5A/KW?
Single phase 380V, 2.5A/KW?
Copper wire, aluminum wire cross sectional area (mm2) model series:
11.5, 2.5461016253550, 7095120150185...
General copper wire safety current max.:
2.5 square mm copper power line of the safe carrying capacity 28A.
4 square mm copper power line of the safe carrying capacity 35A.
6 square mm copper power line of the safe carrying capacity 48A.
10 square mm copper power line of the safe carrying capacity 65A.
16 square mm copper power line of the safe carrying capacity 91A.
25 square mm copper power line of the safe carrying capacity 120A.
If the aluminum cross-sectional area to take copper wire 1.5-2 times.
If the copper line current is less than 28A, be sure to be safe at 10A per square millimeter.
If the copper wire current is greater than 120A, it is taken at 5A per square millimeter.
The current cross-sectional area of aluminium conductor can through the normal can be selected according to the total current needed to conduct, can be determined according to the following doggerel:
Ten, five, 100, two, 253543 times, 70952 times and half, copper wire upgrade count
Is less than 10 square mm aluminum, multiplied by the number 5 on it, if it is a copper wire, lifting gear, such as the 2.5 square copper wire, aluminum wire by 4 square calculation. More than one hundred are multiplied by the cross-sectional area of 2, less than twenty-five square multiplied by 4, more than thirty-five square multiplied by 3, 70 and 95 square are multiplied by 2.5.
Explanation: it can only be used as an estimate, not very accurate.
In addition, if it is indoors, 6 square millimeters of copper wire, the per square current is not more than 10A is safe, from this point of view, you can c
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