CTM/CTMH Series Copper-Magnesium Alloy Contact Wire
Specifications
| Model | CTM/CTMH |
|---|---|
| Standard | GB/T 12971.1-2023; TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS |
| Rated Voltage | For 25kV AC traction power supply systems |
| Design Speed | CTM up to 250km/h; CTMH up to 350km/h (by wire type and tension configuration) |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | Copper-magnesium alloy |
| Installation | Installed in the contact suspension system, used with tension compensation devices |
CTM/CTMH copper-magnesium alloy contact wire is a key current-conducting component of the electrified railway overhead contact system; its performance directly affects pantograph current collection quality and power supply reliability. Terms and definitions: the contact wire runs above the rails, remains in contact with the pantograph strip and conducts current, with left-right symmetric suspension grooves in the upper cross-section. Copper-magnesium alloy contact wire combines high strength with good conductivity, wears evenly and resists fatigue, suits high-speed railway contact suspensions, and extends wire service life while reducing maintenance frequency.
Application: conductor for overhead contact systems of electrified railways, suitable for conventional, speed-raised and high-speed railway contact suspensions, and can be combined with messenger wires, droppers and various clamps into a complete contact suspension.
Available models: CTM110, CTM120, CTM150; CTMH110, CTMH120, CTMH150, selectable by line tension and current collection requirements.
Standard: GB/T 12971.1-2023, Contact wires for electric traction — Part 1: Copper and copper alloy contact wires; the 120/150 sizes also meet the railway requirement of TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS.
Henan Chuangwit Railway Equipment Co., Ltd. supplies the full range of OCS conductors and associated fittings, supports volume procurement and customized supply, and provides selection consulting and end-to-end technical support for railway construction organizations. Hotline: 0375-6051688.
Main parameters of CTM/CTMH series copper-magnesium alloy contact wires (TB/T 2809 series):
| Model | Tensile strength MPa ≥ | Ultimate tensile force kN ≥ (unannealed) | Ultimate tensile force kN ≥ (after annealing) | Elongation % ≥ | Resistivity at 20℃ Ω·mm²/m ≤ |
|---|---|---|---|---|---|
| CTM110 | 440 | 48.84 | 43.96 | 3.0 | 0.02240 |
| CTM120 | 430 | 52.03 | 46.83 | 3.0 | 0.02240 |
| CTM150 | 430 | 63.42 | 57.08 | 3.0 | 0.02240 |
| CTMH110 | 500 | 55.50 | 49.95 | 3.0 | 0.02778 |
| CTMH120 | 490 | 59.29 | 53.36 | 3.0 | 0.02778 |
| CTMH150 | 470 | 70.97 | 63.87 | 3.0 | 0.02778 |
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
CTM CTMH copper-magnesium alloy contact wires produced by Henan Chuangwit Railway Equipment Co., Ltd. offer high strength and high conductivity for high-speed line contact suspensions of electrified railway OCS, with high tensile strength and uniform wear.
Key Features
- Supplied to match the standard tension system of TB/T 2809-2026
- Multiple alloy systems cover different speed and tension classes
- Balances high conductivity with high strength
- Wear-resistant and fatigue-resistant with a long service life
Compliance & Quality Control
The product complies with the TB/T 2809-2026, Copper alloy contact wires for electrification railway OCS series of standards; tensile strength and elongation meet the standards, and wire fatigue performance and straightness meet pantograph current collection requirements. Conductivity is at least 77% IACS for CTM and at least 62% IACS for CTMH (copper-magnesium alloy), 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
We provide selection verification and non-standard customization based on line conditions and operating parameters. Products follow CRCC railway product certification and ISO9001 quality management system requirements; key parameters are verified by factory inspection and type tests. For selection consulting and quotations, 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 the standards; wire fatigue performance and straightness meet pantograph current collection requirements.Electrical Performance
Conductivity CTM at least 77% IACS, CTMH at least 62% IACS; ampacity satisfies traction power supply calculations.Applications
High-Speed Railways
CTM CTMH copper-magnesium alloy contact wires are used in high-speed line contact suspensions, meeting high-speed current collection and high-tension requirements.
Conventional & Heavy-Haul Railways
CTM CTMH copper-magnesium alloy contact wires serve contact suspensions on conventional and heavy-haul lines; fatigue resistance suits heavy loads.
Urban Rail Transit
CTM CTMH copper-magnesium alloy contact wires are used in urban rail OCS, balancing current capacity and mechanical strength.
Coastal Corrosive Environments
Copper and copper alloy contact wires offer good atmospheric corrosion resistance for coastal and industrially polluted environments.
