Calculation method of current quantity of control cable Calculation method of current quantity of power cable
The flow rate of power cables for different materials is different, so we have different basis and rules for wire and cable selection for different purposes. Today we will learn about the flow selection of copper wires.
For the current carrying capacity of the copper wire, the port indicates "the copper wire upgrade calculation", that is, the cross-sectional arrangement order of the copper wire is increased by one step, and then calculated according to the corresponding aluminum wire condition.
For example, the bare copper wire with a cross-section of 35 square millimeters has an ambient temperature of 25 ° C, and the current carrying capacity is calculated as: 50 × 3 × 1.5 = 225 amps by upgrading to a bare aluminum wire of 50 square millimeters.
For the cable, it is not described in the mouth. Generally, the high-voltage cable directly buried in the ground can be directly calculated by using the relevant multiple in the first sentence. For example, a 35 mm square high-voltage armored aluminum core cable is buried at a current carrying capacity of 35 × 3 = 105 amps. 95 square millimeters is about 95 x 2.5 ≈ 238 amps.
Http://news.chinawj.com.cn
Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
High Density Board,Density Fibreboard,Hdf Fiberboard,Hdf Panel Board
Linyi Fengzhize Trading Co., Ltd. , https://www.fengzhize.com