Material consumption
The weight of copper is accustomed to calculation method without conversion: cross-sectional area *8.89=kg/km such as 120 square millimeter calculation: 120*8.89=1066.8kg/km
1. The amount of conductor: (Kg/Km )=d^2 * 0.7854 * G * N * K1 * K2 * C /
d = copper wire diameter G = copper specific gravity N = number of wires K1 = copper wire stranding rate K2 = core wire stranding rate C = number of insulated core wires
2. Insulation amount: (Kg/Km) = (D^2-d^2 )* 0.7854 * G * C * K2 D = insulation outer diameter d = conductor outer diameter G = insulation specific gravity K2 = core wire stranding rate C = Number of insulated core wires
3. The amount of outer cover: (Kg/Km) = (D1^2-D^2) * 0.7854 * G D1 = completed outer diameter D = upper process outer diameter G = insulation specific gravity
4. The amount of strapping: (Kg/Km) = D^2 * 0.7854 * t * G * Z D = the outer diameter of the upper process t = the thickness of the strap G = the specific gravity of the strap Z = the overlap rate (1/4Lap = 1.25)
5. The amount of winding: (Kg/Km) = d^2 * 0.7854 * G * N * Z d = copper wire diameter N = number of wires G = specific gravity Z = twisting rate
6. Knitting amount: (Kg/Km) = d^2 * 0.7854 * T * N * G / cos θ θ = atan( 2 * 3.1416 * (D + d * 2 )) * mesh number / 25.4 / T d = Braided copper wire diameter T = number of spindles N = number of each spindle G = specific gravity of copper
Specific Gravity: Copper-8.89; Silver-10.50; Aluminum-2.70; Zinc-7.05; Nickel-8.90; Tin-7.30; Steel-7.80; Lead-11.40; Aluminum Foil Mylar-1.80; Paper-1.35; Mylar-1.37 PVC- 1.45;LDPE-0.92;HDPE-0.96;PEF (foam)-0.65;FRPE-1.7;Teflon (FEP)2.2;Nylon-0.97;PP-0.97;PU-1.21
Cotton tape -0.55; PP rope -0.55; cotton yarn -0.48
Materials other than conductors
1. Sheath thickness: outer diameter before extrusion×0.035+1 (in accordance with power cables, the nominal thickness of the single-core cable sheath should not be less than 1.4mm, and the nominal thickness of the multi-core cable should not be less than 1.8mm)
2. Online measurement of sheath thickness: sheath thickness = (periphery after squeezing the sheath-perimeter before squeezing the sheath) / 2 π or sheath thickness = (perimeter after squeezing the sheath-before squeezing the sheath Perimeter) ×0.1592
3. The thinnest point of insulation thickness: nominal value×90%-0.1
4. The thinnest point of non-armored shielding sheath: nominal value×85%-0.1
5. The thinnest point of armored or shielded sheath: nominal value×80%-0.2
6. Steel wire armor: Number of wires = {π×(outer diameter of inner sheath + wire diameter)} Steel wire diameter×λ) Weight ÷( Quantity = π×wire diameter²×ρ×L ×number of wires×λ
7. Weight of insulation and sheath = π×(outer diameter before extrusion + thickness) × thickness × L × ρ
8. The weight of the steel strip = {π×(outer diameter before wrapping+2×thickness-1)×2×thickness×ρ×L} /(1+K)
9. The weight of the tape = {π×(outer diameter before wrapping + number of layers × thickness) × number of layers × thickness × ρ×L /(1±K) where: K is the overlap rate or gap rate, if it is Overlap, it is 1-K; if it is a gap, it is 1+K; ρ is the specific gravity of the material; L is the cable length; λ is the stranding coefficient
