This specification covers the design and construction of bare aluminum conductor steel reinforced(ACSR)conductors used for transmission of electrical energy in the overhead transmission lines.
IEC 61089,IEC 60889,IEC 60888,EN 50182.
Concentric lay stranded conductors composed of a central core of round zinc coated steel wire surrounded by one or more adjacent layers of round hard drawn aluminum wires being laid helically in opposite directions. The conductor shall be constructed generally in accordance with above mentioned standard.
4.0 CONDUCTOR CONSTRUCTION
4.1 Steel Core
The steel core is made of by of steel wire, which shall meet the following requirements:
Nominal wire diameter: 2.40 mm
Tolerance on diameter: ±0.03 mm
Nober of steel wire :7
Section of Steel wires:31.8 mm²
Min. weight of zinc coating: 215 g/m2
Min. Stress at 1% extension: 1170 N/mm2
Tensile strength: ≥1310 N/mm2(before twisting)
The adjacent layers［10］of round hard drawn aluminum wires shall be laid helically in opposite directions over the steel core. The aluminum wires shall meet the following requirements:
Nominal wire diameter: 3.60mm
Tolerance on diameter: ±0.03mm
Section of Aluminum conductorpart:249.4 mm²
NO. of aluminum wire : 24
Tensile strength: ≥165N/mm2
Recommended Lay Length Ratio:
1st Layer: 12-14 right hand direction
There shall be no gap between wires of each layer and the conductor must not bulge out during bending, hauling, etc.
5.0 TECHNICAL REQUIREMENTS:
The completed ACSR conductor shall essentially meet the following requirements:
Rated diameter:21.6 mm
Nominal area: 281.2 mm2
Mass of completed conductor: 706±1% kg/km
Resistance at 20℃: 0.125 Ω/km
Breaking strength: 6.710 dN
Module of elasticity: 7,700 daN/mm²
Maximum allowed current charge at 70 ℃:568 A
ACSR Conductor 240/30 mm2
1---Galvanize steel wire
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Product Categories : Overhead Cable