Rated Voltage 1.8/3kV XLPE Insulated Power Cable

Standards
This product is manufactured in accordance with national and industry standards to meet the operational requirements of power systems.

National Standard:
GB/T 12706.1 Cables for rated voltages from 1kV (Um=1.2kV) to 3kV (Um=3.6kV)

Other Standards:
According to user requirements, the cable can also be manufactured based on IEC international standards or specific industry specifications, such as MT818 standards for coal mine cables.

Application Scope
Cables with this voltage level are widely used in fixed installation environments where high reliability of power supply is required. Typical application scenarios include:

• Industrial power distribution systems: Suitable for distribution networks in industrial installations with rated voltages up to 1.8/3kV, particularly for power supply connections of large motors and variable frequency equipment.

• Mining and energy sectors: Applicable for power supply lines installed in coal mine underground environments and surface installations when equipped with flame-retardant sheath structures, enabling adaptation to complex operating conditions.

• Long-distance power transmission: Compared with 0.6/1kV cables, cables of the same conductor cross-section can transmit electricity over longer distances while reducing line losses.

• Installation environments: Suitable for indoor installation, tunnels, cable trenches, vertical shafts, and direct burial applications. Armored or non-armored types can be selected according to the installation environment.

Operating Characteristics
• Rated Voltage:
The power frequency rated voltage U0/U is 1.8/3kV.

• Operating Temperature:
The maximum permissible long-term operating temperature of the cable conductor is 90°C, providing strong load carrying capability.

• Short-Circuit Temperature:
During short-circuit conditions (maximum duration not exceeding 5 seconds), the maximum conductor temperature shall not exceed 250°C, maintaining thermal stability under extreme conditions.

• Installation Temperature:
The ambient temperature during cable installation shall not be lower than 0°C. If installation occurs below this temperature, preheating measures are required.

• Minimum Bending Radius:
The minimum allowable bending radius of the cable shall not be less than 15 times the cable outer diameter, supporting convenient installation during construction.

• Electrical Performance:
The cable features low dielectric loss and high insulation resistance, and the AC withstand voltage test standard is higher than that of standard low-voltage cables.

Cable Structure
The product adopts a multi-layer composite structural design to support safe and stable operation over long-term service:

1. Conductor: High-purity copper or aluminum conductor compliant with GB/T 3956, providing high electrical conductivity.

2. Insulation Layer: Cross-linked polyethylene (XLPE) insulation, with insulation thickness optimized according to the voltage level and providing stable dielectric performance.

3. Filling and Binding: Non-hygroscopic filling materials maintain cable roundness, while non-woven binding tape secures the cable cores.

4. Inner Sheath (Optional): Used to separate the armored layer from insulated cores and prevent mechanical damage.

5. Armoring Layer (Optional): Steel tape armoring for compression resistance or steel wire armoring for tensile strength, enhancing mechanical protection.

6. Outer Sheath: PVC or PE sheath with resistance to corrosion, aging, and flame propagation.

Main Technical Parameters
• Conductor DC Resistance:
Complies with GB/T 3956 requirements at 20°C.

• AC Withstand Voltage Test:
Test voltage 6.5kV, duration 5 minutes, without breakdown.
This value is higher than the 3.5kV standard applied to 0.6/1kV cables.

• Partial Discharge:
At 1.73U0, the maximum partial discharge value does not exceed the specified limit, ensuring that the insulation system is free from defects.

Current Carrying Capacity and Installation Correction
The current carrying capacity of cables is affected by factors such as installation environment (air or soil), ambient temperature, soil thermal resistivity, and installation method.

• Installation in air:
Reference ambient temperature 40°C, maximum long-term conductor temperature 90°C.

• Installation in soil:
Reference soil temperature 25°C, soil thermal resistivity 2.0K·m/W, direct burial depth 0.7m.

• Correction factors:
In practical engineering applications, current-carrying capacity should be adjusted according to ambient temperature, soil temperature, and multiple parallel cable installations by consulting the corresponding correction factor tables to maintain safe cable operation without overload conditions.

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.