Excuse me, who knows the weight of steel-core aluminum stranded wire LGJ-50 per kilometer?

Its conductor structure: aluminum wire is 6/3.20 (six aluminum wires with a diameter of 3.20mm are twisted), and steel wire is 1/3.20( 1 steel wire with a diameter of 3.20mm).

You can calculate the cross section to see:

Aluminum profile = (3.14/4) * 3.2 * 3.2 * 6 = 48.25mm2.

Steel section = (3.14/4) * 3.2 * 3.2 *1= 8.04mm2.

Then the weight per kilometer = 48.25 * 2.7+8.04 * 7.8 =193kg/km.

Among them, 2.7 is the specific gravity of aluminum and 7.8 is the specific gravity of steel. Both units are grams per cubic centimeter, and the final calculation unit is kilograms per kilometer, which is the specific gravity at work (a bunch of units are converted, regardless).

If you don't know the specific structure of the conductor, you can directly use the sectional area to calculate:

Weight per kilometer = 50 * 2.7+8 * 7.8 = 197.4 kg/km.

It doesn't make much difference

See GB1179-1999 for details.

Answer over! Simple knowledge of cable structure can be found here @ _ @