Comprehensive grounding cable for rail transit
A technology for grounding cables and rail transit, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of copper conductors and poor corrosion resistance, high manufacturing costs, etc., to improve strength and hardness, reduce material costs, and improve external resistance The effect of external force on the ability to damage
Active Publication Date: 2013-06-05
JIANGSU HENGTONG WIRE & CABLE TECH
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The conductor of the existing integrated ground wire is a pure copper conductor, which is made of a stranded conductor through the ground wire after being drawn, annealed, and stranded by an electrical round copper wire. After the outer layer of the stranded conductor is extruded with a conductive plastic sheath The conductor of this integrated grounding wire is made of pure copper, the copper content is more than 99.9%, and the manufacturing cost is expensive
Relatively poor copper conductor and corrosion resistance
Method used
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Examples
Experimental program
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Effect test
Embodiment 1-3
[0030] Embodiment 1-3: An integrated grounding cable for rail transit, comprising: a signal group 3 composed of 18 grounding conductors 1 and at least 4 copper conductors 2 as signal lines, the surfaces of the copper conductors 2 are all coated There is a polyethylene layer 4, 6 of the 18 grounding wires 1 are twisted on the surface of the signal group 3 to form a first grounding wire layer 5, and the remaining 12 grounding wires of the 18 grounding wires 1 are stranded Forming a second grounding wire layer 6 on the surface of the first grounding wire layer 5;
[0031] The resistivity of the grounding wire 1 is not greater than 0.03Ω·mm2 / m, and the density is not greater than 2.8 g / cm3. The grounding wire 1 of Examples 1-3 consists of the following components:
[0032] Table 1
[0033] aluminum magnesium silicon iron other metals Example 1 93.0% 5.0% 1% 0.6% 0.4% Example 2 94% 4.7% 0.8% 0.45% 0.05% Example 3 94.2 % 4.5% 0.6% 0...
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Abstract
The invention discloses a comprehensive grounding cable for rail transit. The comprehensive grounding cable comprises eighteen grounding conductor wires and at least four signal groups consisting of copper conductor wires serving as signals wires, wherein polyethylene layers are respectively coated on the surfaces of the copper conductor wires, six of the eighteen grounding conductor wires are stranded on the surface of the signal group to form a first grounding conductor wire layer, the rest 12 of the eighteen grounding conductor wires are stranded on the surface of the first grounding conductor wire layer to form a second grounding conductor wire layer; the resistivity of the grounding conductor wires is not more than 0.03ohm.mm<2> / m, and the grounding conductor wires is mainly composedof the following components: aluminum, magnesium, silicon and iron; and an electroconductive protective layer with the volume resistivity smaller than 0.65ohm.cm is coated on the surface of the second grounding conductor wire layer and is composed of the following components: polyethylene, electroconductive carbon black, a plastic electroconductive agent and an additive. The comprehensive grounding cable disclosed by the invention is increased in strength, rigidity, mechanical and physical properties and resistance to external force damages, and has excellent electrical conductivity.
Description
technical field [0001] The invention relates to the field of comprehensive grounding systems for rail transit, in particular to a comprehensive grounding cable for rail transit. Background technique [0002] The integrated grounding cable is a comprehensive grounding cable used in the field of rail transit, and is a safety grounding wire for system shielding, lightning protection, and electrical equipment. The comprehensive grounding cable can basically keep the potential of each working point of the electrical system of a large-scale rail transit line consistent, making the system equipment grounding safe and reliable, eliminating the potential unbalanced current caused by the potential difference between different equipment, and realizing the protection of personnel. and effective and reliable protection of equipment. [0003] The conductor of the existing integrated ground wire is a pure copper conductor, which is made of a stranded conductor through the ground wire afte...
Claims
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IPC IPC(8): H01B7/00H01B7/17
CPCY02A30/14
Inventor 王国权陆春良司树华淮平金春敏陆国华
Owner JIANGSU HENGTONG WIRE & CABLE TECH