CTA/CTAH Series Copper-Silver Alloy Contact Wire

CTA/CTAH copper-silver 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-silver alloy contact wire adds silver to pure copper, further raising tensile strength and wear resistance while keeping high conductivity, better suited to the high-tension, high-collection duty of high-speed and heavy-haul lines.

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: CTA85, CTA110, CTA120, CTA150; CTAH85, CTAH110, CTAH120, CTAH150, 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 CTA/CTAH series copper-silver alloy contact wires (TB/T 2809 series):

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

CTA CTAH copper-silver alloy contact wires are one of the leading products in the Chuangwit contact wire and messenger wire range. With high conductivity and high wear resistance, they suit overhead contact systems of electrified railways, especially contact suspensions of high-speed and heavy-haul lines.

Key Features

• Wear-resistant and fatigue-resistant with a long service life
• 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

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 97% IACS (copper-silver 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

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.