TJ hard copper stranded conductor has a sectional area range of 10-500mm2, and it is mainly used for overhead power line and power supply system of electric railway.Technical Parameters
|Nominal Cross Section (mm2)||Single Wire||Outer Diameter of Strand (mm)||Calculated Tensile Strength (kN)||Max. DC Resistance at 20℃ (Ω/km)||Current Capacity (A)||Calculated Weight (kg/km)|
1. The weight is calculated according to average lay ratio and density of 8.9kg/dm3.
2. Recommended working condition: wind speed is 0.6m/s, ambient temperature is 35℃, frequency is 60Hz or lower, and the maximum temperature for conductor is 70℃. When it is specially laid in static air, the capacity will descend for about 30%.
This stranded conductor can be delivered at any length according to the negotiation, and the length error for single wire is within ±5%. Meanwhile, short cable is also acceptable, but its length should not exceed 5% of the total length per time. Also, there are some requirements for every short cable as listed below.
1. The total length of short product should be longer than 150 meters if the nominal cross section is 70mm2 or lower.
2. For short cable whose nominal cross section is 95mm2 or higher, its total length should not be shorter than 250 meters.
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