OPGW/Ground Wire

Ground Wire (Enhanced Corrosion-resistant Ground Wire)

Protection of power lines from lightning overvoltage, construction of optical communication systems.

1

Central strength member (Aluminum Clad Steel wire)

2

Stranded wires (aluminum-clad Steel wires and /or aluminum alloy wires)

3

Stranded wires (aluminum-clad Steel wires and /or aluminum alloy wires)

Aluminum-clad steel wires are corrosion resistant

Mandatory element of 35 kV power lines approaching electrical substations and of all 110 kV power line

Aluminum alloy wires shield the high-voltage conductors from lightning strikes

Outer diameter, mm 7.6 9.1 11.1 12.1 13.2 14.2 22.6
Weight, kg/km 230 328 469 574 675 783 1990
Rated breaking strength, kN 45.4 64.9 91.5 111.7 131.9 152.2 383.5
Tensile strength, kN 28.4 40.6 57.3 69.9 82.6 95.3 240.3
Average operating load, kN 13.6 19.5 27.5 33.5 39.6 45.6 115.0
Sectional area of steel elements, mm2 35.0 50.0 70.7 86.3 101.7 117.8 298.5
Sectional area of aluminum elements, mm2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Total sectional area, mm2 35.0 50.0 70.7 86.3 101.7 117.8 298.5
DC resistance at 20 °C, Ohm/km 2.472 1.730 1.221 1.000 0.848 0.733 0.290
Thermal resistance to short-circuit current, kA2s 8.7 17.7 35.8 53.4 74.2 99.4 636.7
Coefficient of linear thermal expansion, 10-6 1/K 12.6 12.6 12.6 12.6 12.6 12.6 12.6
Elasticity modulus (final), kN/mm2 157.8 157.9 156.6 156.4 156.7 156.2 155.5
Modulus of elasticity (initial, installation), kN/mm2 139.8 139.9 138.7 138.5 138.9 138.4 137.7
Modulus of elasticity (drawing), kN/mm2 123.1 123.2 122.2 122.0 122.3 121.9 121.3
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Operation temperature -60°С…+85°С
Installation temperature -30°С…+50°С
Transportation and storage temperature -60°С…+70°С
Minimum bending radius 20x cable diameter
Life time 50 years