High-Voltage Cable

35kV AND BELOW XLPE INSULATED SHIELDED FLAME-RETARDANT HIGH VOLTAGE CABLE

1. Structure Diagram

The structural integrity of this power transmission solution begins with its meticulously engineered core. Designed for demanding applications, the internal architecture ensures optimal electrical performance and mechanical resilience. The dense, heavy feel of the stranded copper or aluminum conductor guarantees maximum conductivity with zero air gaps, while the smooth, seamless finish of the semi-conductive shielding material prevents localized electrical stress. By integrating advanced cross-linked polyethylene (XLPE), the insulation layer provides exceptional dielectric strength. This foundational design not only supports high-capacity energy transfer but also forms the basis for our comprehensive engineering design services, allowing for precise structural modifications to meet specific project requirements.

2. Construction Description

Every layer of this transmission line is crafted to withstand punishing environments and ensure long-term operational safety. The tactile flexibility of the metallic copper tape shield allows for manageable routing during installation, while the resilient, non-hygroscopic filler materials effectively block moisture ingress, even in damp underground trenches. The robust outer sheath—whether polyvinyl chloride or polyolefin—presents a tough, abrasion-resistant surface that protects against physical impacts and chemical exposure. Our stringent quality control system ensures that every material batch is verified for structural consistency, guaranteeing reliable performance across extreme temperature fluctuations and challenging physical terrains.

3. Standard Applied

GB/T 12076.2-2020 GB/T 12076.3-2020

Compliance is the absolute baseline for global electrical safety. Beyond strict adherence to the specified GB/T frameworks, our manufacturing processes are aligned with international quality management systems, including ISO 9001 protocols. This commitment to standardized excellence ensures that every reel of cable meets rigorous criteria for flame retardancy, insulation resistance, and mechanical durability. For cross-border procurement teams and international project managers, this comprehensive adherence to recognized industry standards provides the necessary assurance for regulatory approval, seamless grid integration, and long-term liability mitigation across diverse global jurisdictions.

4. Main Characteristics

The max. rated temperature of cable conductor is 90℃, and the max. temperature of cable conductor is no more than 250℃ when short circuit less than 5 seconds.

Beyond these critical thermal baselines, the inherent stability of the XLPE insulation prevents molecular degradation even under continuous heavy load cycles. To validate these characteristics, our quality assurance facilities subject every production run to severe stress testing, including high-voltage withstand evaluations and precise partial discharge monitoring. This ensures the insulation remains entirely free of micro-voids. Consequently, the product delivers unwavering performance in extreme environments, maintaining structural integrity and electrical safety whether deployed in scorching desert solar farms or deep, humid underground utility vaults.

5. Installation Recommendation

1) When cable installation, the ambient temperature should not be lower than 0℃, or, to be preheated.

2) Bending radius: 20D for unarmored single-core while 15D for armored. 15D for unarmored multi-cores while 12D for armored.

Proper deployment is critical for maximizing the lifespan of the infrastructure. To assist procurement and engineering teams, we provide a complete technical support ecosystem. This includes detailed installation manuals, specialized routing guidelines, and access to expert engineering consultation. By strictly adhering to these bending radius parameters, installation crews prevent micro-cracking in the insulation and maintain the uniform distribution of the shielding layers. Furthermore, our comprehensive after-sales resources and warranty systems help contractors reduce overall application costs while ensuring flawless commissioning.

6. Application

The cables are applied in transmission and distribution in high voltage power lines with rated voltage from 3 to 35kV.

Modern infrastructure demands uncompromising power delivery solutions across a wide spectrum of critical sectors. These robust transmission lines are specifically engineered to form the backbone of highly demanding environments. Key application scenarios include:

• Data Centers: Ensuring uninterrupted, stable power feeds to critical server racks and cooling infrastructure.

• Renewable Energy (Wind & Solar): Withstanding constant UV exposure and thermal cycling in massive outdoor generation farms.

• Municipal Power Grids: Providing reliable underground distribution for expanding urban centers without frequent maintenance interruptions.

• Rail Transit Systems: Delivering consistent voltage to traction substations under constant vibrational stress.

• Industrial Mining: Operating safely in deep underground shafts where moisture, dust, and physical hazards are prevalent.

7. Specification Description:

Selecting the correct armoring and sheathing configuration dictates the operational lifespan of the installation. For instance, steel-strip armored variants provide exceptional resistance against crushing radial forces, making them ideal for direct-buried applications. Conversely, fine and thick steel wire armored configurations are crucial for withstanding severe longitudinal tension, such as in high-drop vertical shafts or underwater deployments. Understanding these mechanical nuances ensures that every project receives the exact protective profile required for its specific environmental hazards.

8. Size

Mark: All above specifications can be made to halogen-free (WD type), and can be customized upon request.

Our engineering design services extend far beyond standard sizing matrices. We offer end-to-end custom R&D solutions tailored to unique project requirements. Whether a facility demands specialized low-smoke zero-halogen (LSZH) materials to protect personnel in enclosed spaces, enhanced flame-retardant grades (ZA, ZB, ZC) for critical fire-risk zones, or specific tensile strength modifications for complex routing, our technical team collaborates directly with clients to formulate the exact material composition and structural blueprint needed.

9. Project Delivery & Supply Chain Assurance

Meeting strict construction schedules requires more than just advanced manufacturing capability; it demands a resilient and highly responsive supply chain. We recognize that delays in material arrival can derail entire mega-projects. To mitigate this risk, we maintain an efficient inventory management system and robust logistics networks capable of executing rapid emergency response orders. From initial production scheduling to final site delivery, our dedicated project fulfillment teams ensure that massive quantities of specialized cabling arrive precisely when needed, safeguarding your construction timelines and minimizing costly operational downtime.