JT Series Hard Copper Stranded Wire
Specifications
| Model | JT |
|---|---|
| Standard | TB/T 3111.1-2026, Stranded conductors for overhead contact system of electrification railway — Part 1: Copper and copper alloy stranded conductors |
| Rated Voltage | For 25kV AC traction power supply systems |
| Design Speed | Per contact suspension design (mainly messenger wires for conventional-speed and urban rail lines) |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | Hard copper (stranded from hard-drawn round copper wire) |
| Installation | Installed in the contact suspension system, used with tension compensation devices |
JT series hard copper stranded wire
Application: Conductor for overhead contact systems of electrified railways
Models: JT70、JT95、JT120、JT150 (JT150 available in two constructions, 1×19 and 1×37)
Standard: TB/T 3111.1-2026《Stranded conductors for overhead contact system of electrification railway — Part 1: Copper and copper alloy stranded conductors》
Main sizes of JT series hard copper stranded wire (TB/T 3111 series):
| Model | Construction | Calculated cross-section mm² | Stranded wire OD mm | Single-wire diameter mm | Ultimate tensile force kN ≥ | Unit mass kg/km |
|---|---|---|---|---|---|---|
| JT70 | 1×19 | 65.81 | 10.50 | 2.10 | 27.45 | 599 |
| JT95 | 1×19 | 93.27 | 12.50 | 2.50 | 38.54 | 849 |
| JT120 | 1×19 | 116.99 | 14.00 | 2.80 | 48.01 | 1065 |
| JT150 | 1×19 | 148.07 | 15.80 | 3.15 | 60.21 | 1347 |
| JT150 | 1×37 | 147.11 | 15.75 | 2.25 | 61.21 | 1342 |
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
JT series hard copper stranded wire is designed and manufactured by Henan Chuangwit Railway Equipment Co., Ltd. to railway industry standards. As a dedicated conductor for overhead contact systems of electrified railways, it offers good conductivity and high tensile strength for use as OCS messenger wire and auxiliary suspension conductor.
Key Features
- Wear-resistant and fatigue-resistant with a long service life
- Supplied to match the tension system of TB/T 3111.1-2026
- Proven service as messenger wire and auxiliary suspension conductor
- Balances high conductivity with high strength
Compliance & Quality Control
The product complies with 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 standard tension system, with uniform stranding and fatigue resistance. Conductivity is at least 97% IACS (hard copper), and ampacity satisfies traction power supply calculations. 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
Backed by 15 years of R&D and manufacturing experience in railway electrification equipment, the company provides full life-cycle support covering selection, customization, supply and after-sales service, serving more than 20 railway administrations and multiple urban rail lines nationwide. For technical documentation and purchasing, 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
Tensile strength and elongation meet TB/T 3111.1-2026; uniform stranding with fatigue resistance.Electrical Performance
Conductivity at least 97% IACS (hard copper); ampacity satisfies traction power supply calculations.Applications
High-Speed Railways
JT series suits messenger wires and auxiliary suspension of conventional and speed-raised lines; for high-speed sections choose JTM/JTMH copper-magnesium alloy stranded wires.
Conventional & Heavy-Haul Railways
JT series hard copper stranded wire serves as messenger wire on conventional and heavy-haul lines; its fatigue resistance suits heavy loads.
Urban Rail Transit
JT series hard 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.
