Copper Stranded Wire (TJ, TJR & TJX Series)

Product Standards
The R&D and manufacturing processes strictly implement multiple national standards and technical specifications to ensure performance indicators meet industry-leading levels:
National Standards: Compliant with GB/T 1179-2017 (Round wire concentric lay overhead electrical stranded conductors) and GB/T 3956-2008 (Conductors of cables).
Enterprise Technical Specification: Meets the specialized technical requirements of Q/320282 GAD021-2019.

Product Structure and Material Characteristics
This series features distinct characteristics in conductor hardness and surface treatment to suit different application focuses:
High-Purity Conductor Material: Uses premium electrical-grade copper, with strictly controlled impurity levels to ensure maximum conductivity.
Hard Copper Stranded Structure (TJ Type): Manufactured through a hard-drawing process, providing high mechanical tensile strength to withstand significant physical stress.
Soft/Annealed Copper Series (TJR/TJR1 Type): Treated through a specific annealing process to significantly enhance flexibility and bending fatigue resistance, facilitating installation and connection in confined spaces.
Tin-Plated Protective Layer (TJX/TJRX Type): Features a uniform tin coating on the copper wire surface, which not only effectively prevents oxidation in humid environments but also significantly improves soldering performance and corrosion resistance life.

Operating Characteristics & Performance Advantages
Superior Current-Carrying Capacity: The DC resistance of the conductor is strictly controlled within standard limits, effectively reducing energy loss and heat accumulation during high-current transmission.
Balance of Strength and Flexibility: The hard-drawn series provides reliable tensile strength, while the soft series offers excellent installation flexibility, adapting to environments with frequent vibration or movement.
Scientific Stranding Process: The concentric-lay stranding ensures a compact structure and a smooth, uniform surface, which optimizes the electric field distribution during operation.
Long-Term Operational Stability: Particularly for the tin-plated series, the product demonstrates excellent chemical stability in harsh industrial or coastal atmospheric environments, reducing long-term maintenance costs.

Core Application Areas
Overhead Transmission and Distribution: Hard copper stranded wire is widely used as conductors for urban and rural power lines and lightning protection systems.
Grounding Protection Engineering: Serves as the core lead-off wire for high-standard grounding grids, ensuring rapid discharge of fault currents and system safety.
Electrical Equipment Connectivity: Soft and tin-plated stranded wires are commonly used for internal connections in transformers and motors, as well as power links for various low-voltage electrical apparatus.
Transportation and Industrial Distribution: Suitable for specialized scenarios requiring high conductivity reliability, such as rail transit traction power supply and internal wiring for switchgear cabinets.

Q: 10. What is your company's business philosophy?

A: The company adheres to the strategy of "revitalizing the enterprise through science and technology," with a market-centered, sales-focused, customer-need-satisfying approach. It continuously optimizes its product structure, increases technological content, and ensures steadily improving product quality.

Q: 9. In which fields are your company's products applied?

A: The products cover multiple fields including electric power, new energy, transportation, communications, and engineering. The company has also continuously passed the qualification verification for power cables and conductors of the State Grid Corporation of China for many years.

Q: 8. What green and environmental certifications or initiatives does the company have?

A: The company has established an Environmental Management System, Energy Management System, Green Management System, and Social Responsibility Management System. It has completed product carbon footprint certification and obtained certifications such as "Green Manufacturing Enterprise," "China Energy-Saving and Environmental Protection Product," and "Carbon Neutrality Commitment Demonstration Unit."

Q: 7. Does the company focus on technological innovation? What recent patent achievements have there been?

A: The company actively implements the strategy of "revitalizing the enterprise through science and technology" and continuously increases R&D investment. As of 2026, it has disclosed 45 patents, including an important patent for "a halogen-free flame-retardant environmentally friendly cable and its preparation method."

Q: 6. What honors has your company received?

A: The company has established a municipal-level Engineering Technology Research Center and serves as a industry-academia-research cooperation demonstration base for Changzhou Institute of Technology. It is recognized as a provincial-level "Specialized, Refined, Distinctive, and Innovative" SME, a provincial-level green factory, a national high-tech enterprise, a digital workshop, a national intellectual property advantage enterprise, a quality integrity enterprise, a contract-abiding and creditworthy unit, an outstanding enterprise for industrial development, and a Jiangsu provincial private technology enterprise.

Q: 5. Does the company have sales and service networks across the country?

A: Yes. The company has set up sales outlets or offices in many major cities across China, such as Nanjing, Shanghai, Beijing, Guangzhou, Shenzhen, and Inner Mongolia, responsible for marketing and product after-sales service.

Q: 4. What is your company's production capacity?

A: The company currently has over 140 employees and an annual production capacity of 3 billion RMB scale.

Q: 3. Has the company obtained relevant quality system certifications?

A: Yes. The company has obtained ISO9001 Quality Management System, ISO14001 Environmental Management System, ISO45001 Occupational Health and Safety Management System, and GB/T23331 Energy Management System certifications. It has also obtained the national compulsory CCC certification and the National Industrial Production License.