Zhengzhou Yifang Cable Co., Ltd |
|
Only compatible materials that are suitable for the specified service conditions shall be used in the construction of the cables.
Table 1: Supporting Catenary
Catenary Size, mm² | 50 | 70 | |
Number of Wires | 7 | 7 | |
Wire Size (diameter), mm | 3.00 | 3.60 | |
Minimum Tensile Strength of each Wire, kN | 9.26 | 13.13 | |
Elongation at break, minimum % | 3.5 | 4 | |
Thickness of protective covering | Nominal, mm | 1.20 | 1.20 |
Minimum at any point, mm | 0.96 | 0.96 |
The aerial bundled cables shall comply with the following table:
Table 2: Electrical and Mechanical Characteristics
Conductor size, mm² | 70 | 95 | 185 | ||
Diameter over conductor, nominal, mm | 9.3-10.2 | 11.6 | 16.4 | ||
Thickness of dielectric | Nominal, mm | 3.4 | 3.4 | 3.4 | |
Minimum at a point, mm | 2.96 | 2.96 | 2.96 | ||
Diameter over insulation Nominal, mm | 16.1-17.0 | 21.3 | 25.9 | ||
Diameter over semi-conducting core screen Nominal, mm | 18.1-19 | 23.3 | 27.9 | ||
Thickness of copper tape Nominal, mm | 0.15 | 0.15 | 0.15 | ||
Thickness of sheath | Nominal, mm | 1.8 | 1.8 | 1.9 | |
Minimum at a point, mm | 1.43 | 1.43 | 1.51 | ||
Catenary size, mm² | 50 | 50 | 70 | ||
Overall diameter of bundle, Nominal, mm | Bidder to state | 67.8 | 79.2 | ||
Nominal mass, kg/m | Bidder to state | 3.25 | 4.65 | ||
Resistance, Ω/km | 0.443 | 0.32 | 0.164 | ||
Strands, no. | 12 | 15 | 30 |