电线线径计算(国外英文资料).docVIP

电线线径计算(国外英文资料) In fact, the wire can also be called its diameter, such as 1 square can also be called diameter 1.13MM, 1.5 square can also be said to be 1.37 (mm diameter). Because the main consideration when using the selected wire wire will strictly fever caused by accident, the wire (section) is directly corresponding to the multiple relationship between current square number and the amperes, calculation is simple and convenient. For example, a square copper wire that flows through the 6A current is safe and wont get very hot. Such as 2.5 square copper wire is 6A*2.5=15A, so simply calculate, the 2.5 square through the 15A current is safe, such as using diameter calculation is more trouble The 1.5/2.5/4/6 in the specification refers to the cross-sectional area of the line. Single core cable, the single core area is the specifications, multi-core, but also multiplied by the root number. Referring to the GB5023-1997 single core structure, the conductor diameters are: 1 - 1.13, 1.5 - 1.38, 2.5 - 1.78, 4 - 2.25, 6 - 2.76,, Multi-core structure: Sectional diameter, conductor structure, insulation thickness 101.357, 1 161.707, 1 252.147, 1.2 302.527, 1.2 501.8219, 1.4 702.1419, 1.4 952.5219, 1.6 1202.5224, 1.6 1502.5230, 1.8 1852.5237, 2 2402.5248, 2.2 In fact, people say that line diameter, 1.5/2 and so on, just for convenience, is a very common, but not often corrected mistakes. I wonder if its confusing you...... The capacity of a three-phase motor is divided by the number of kilovolt and the quotient multiplied by factor 76 (note 0.76 is the power factor of 0.85 and the efficiency is 0.9) The relationship thus derived is: Three phase two hundred and twenty motors, kW three point five amperes. Commonly used three hundred and eighty motors, one kilowatt, two amperes. Low voltage six hundred and sixty motors, kW one point two amperes. High voltage three thousand V motor, four kW ampere. High voltage six thousand V motor, eight kW ampere. Load: 16A for 3500W at most, a