TJR Series Soft Copper Stranded Wire
Specifications
| Model | TJR |
|---|---|
| Standard | GB/T 12970.2-2009, Soft copper wires for electrical purposes — Part 2: Soft copper stranded wire |
| Rated Voltage | For 25kV AC traction power supply systems |
| Design Speed | Not applicable (for electrical connections, earthing leads and jumpers) |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | Soft copper (stranded from annealed round copper wire) |
| Installation | Installed in the contact suspension system, used with tension compensation devices |
TJR series soft copper stranded wire
Application: Conductor for electrical connections, earthing leads and jumpers
Models: TJR10、TJR16、TJR25、TJR35、TJR50、TJR70、TJR95、TJR120、TJR160、TJR185、TJR250
Standard: GB/T 12970.2-2009 (type designation TJR1)
Main sizes of TJR series soft copper stranded wire (GB/T 12970.2-2009):
| Nominal cross-section mm² | Calculated cross-section mm² | Calculated OD mm | DC resistance at 20℃ Ω/km ≤ | Calculated weight kg/km |
|---|---|---|---|---|
| 10 | 10.01 | 4.59 | 1.83 | 94.3 |
| 16 | 15.84 | 6.17 | 1.16 | 150 |
| 25 | 25.08 | 7.35 | 0.736 | 239 |
| 35 | 35.14 | 8.70 | 0.525 | 334 |
| 50 | 48.30 | 10.20 | 0.382 | 459 |
| 70 | 68.64 | 12.53 | 0.269 | 653 |
| 95 | 94.06 | 14.28 | 0.196 | 895 |
| 120 | 117.67 | 17.39 | 0.157 | 1119 |
| 160 | 162.86 | 20.20 | 0.113 | 1549 |
| 185 | 183.85 | 21.74 | 0.100 | 1749 |
| 250 | 251.95 | 24.72 | 0.0732 | 2397 |
Table values are compiled from current national and railway industry standards; ordered parameters are subject to the latest published standard edition and the supply technical agreement.
Product Overview
TJR series soft copper stranded wire is one of the leading products in the Chuangwit contact wire and messenger wire range. Suited to overhead contact systems of electrified railways, it is flexible and easy to install, with excellent electrical performance, and is commonly used for electrical connections and earthing leads.
Key Features
- Flexible and easy to bend, convenient for installation and termination
- High conductivity for electrical connections and earthing leads
- Manufactured to GB/T 12970.2-2009 with complete sizes from 10 to 250 mm2
Compliance & Quality Control
The product complies with GB/T 12970.2-2009, Soft copper wires for electrical purposes — Part 2: Soft copper stranded wire (type designation TJR1) and TB/T 3111.1-2026, Stranded conductors for overhead contact system of electrification railway — Part 1: Copper and copper alloy stranded conductors. Tensile strength and elongation meet the standards, with uniform stranding and fatigue resistance. DC resistance at 20℃ meets the standard and the fine flexibility eases termination. The company holds CRCC railway product certification and ISO9001 quality management system certification; every reel (batch) is delivered only after passing factory inspection.
Operating Conditions & Typical Applications
Suitable for high-speed, conventional-speed and urban rail OCS, enduring long-term current loading, vibration and atmospheric corrosion. Typical applications include high-speed railways, conventional and heavy-haul railways, urban rail transit and coastal corrosive environments.
Selection & Service
The company provides end-to-end service from selection calculations and drawing confirmation to volume supply and on-site technical guidance. Products are controlled under CRCC certification and the ISO9001 quality management system; standard items are stocked and volume orders are delivered on contractual schedules. For technical support and commercial inquiries, please call 0375-6051688.
Performance
Operating Conditions
Suitable for high-speed, conventional-speed and urban rail OCS, enduring long-term current loading, vibration and atmospheric corrosion.
Mechanical Performance
Performance meets GB/T 12970.2-2009; flexible, bend-tolerant and easy to terminate.Electrical Performance
DC resistance at 20℃ meets GB/T 12970.2-2009; high flexibility eases termination.Applications
High-Speed Railways
TJR series soft copper stranded wire is used for electrical connections, jumpers and earthing leads in high-speed stations and lines.
Conventional & Heavy-Haul Railways
TJR series soft copper stranded wire serves electrical connections, jumpers and earthing leads on conventional and heavy-haul lines.
Urban Rail Transit
TJR series soft copper stranded wire is used in urban rail OCS, balancing current capacity and mechanical strength.
Coastal Corrosive Environments
Copper and copper alloy stranded wires offer good atmospheric corrosion resistance for coastal and industrially polluted environments.
