35kV Medium-High Voltage Cable
XWA 35kV medium voltage power cable is designed for reliable and safe power transmission in high-load power grids, industrial facilities, infrastructure projects, and renewable energy stations. Engineered in full compliance with IEC 60502 and GB/T 12706 normes, our cable features high-purity copper or aluminum conductors, XLPE insulation with triple-layer semi-conductive screens, and optional steel tape or steel wire armoring to deliver excellent electrical performance, thermal stability, and mechanical protection.
We provide full customization of conductor cross-section, sheath material, armoring type and delivery length, backed by our professional manufacturing capability and competitive factory price.
Années de fabrication
5 +
Pays exportés
40 +
Medium-High Voltage
5- 36 kV
Testé en usine XWA
100 %
35kV Cable – Key Specifications & Construction
- Conducteur:High-purity annealed copper or aluminum conductor, available in various cross-sections (50mm² to 800mm²).
- Isolation:XLPE (Cross-linked Polyethylene) or HEPR (Hard Ethylene Propylene Rubber) insulation, offering excellent thermal stability, high dielectric strength, and long-term aging resistance for 35kV high-voltage systems.
- Screen/Sheath:Triple-layer semi-conductive and metallic copper screen to precisely control electric fields and eliminate partial discharges; outer sheath (PVC, PE, or halogen-free LSZH compound) provides robust protection against oils, chemicals, UV radiation, and mechanical damage.
- Armoring:Optional galvanized steel wire armor (SWA) or steel tape armor (STA) for enhanced mechanical protection against crushing, impact, rodent damage, and tensile stress in heavy-duty installation scenarios.
- Tension nominale:35kV (26/35kV, 21/35kV， 18/30kV(36kV))
- Standards Compliance:CEI 60502-2, CEI 60228, IEC/EN 60332-1-2, GB/T 12706, GB/T 11017
✔IEC 60502 Conforme -- ✔ CEA S-97-682 / UL 1072 -- ✔ISO 9001 Système qualité -- ✔ Certifié CE -- ✔OEM personnalisé disponible
Technical Specifications of XWA 35kV Cable
| Item | Parameter | Details |
|---|---|---|
| Conducteur | Material | High-purity annealed Cuivre (Cu) / Aluminum (Al) |
| Standard | CEI 60228 (Classe 2/5) | |
| Cross-section | 50 mm² ~ 800 mm² (Customizable) | |
| Isolation | Material | XLPE (Cross-linked PE) / HEPR (Hard EPR) |
| Thickness | ≥ 10.0 mm (per IEC 60502-2 for 26/35kV) | |
| Temp. Rating | 90°C (continuous); 130°C (short-term) | |
| Dielectric Strength | ≥ 30 kV/mm (DC) | ≥ 20 kV/mm (AC) | |
| Volume Resistivity | ≥ 1×10¹⁴ Ω·m (20°C) | |
| Screen | Inner Screen | Semi-conductive XLPE compound (thickness ≥ 1.5 mm) |
| Metallic Screen | Copper tape (≥ 0.20 mm) / Copper strands (Mandatory) | |
| Outer Screen | Semi-conductive PE sheath (thickness ≥ 1.5 mm) | |
| Grounding Resistance | ≤ 0.3 Ω/km (20°C) | |
| Armoring | Type | SWA (Steel Wire) / STA (Steel Tape) (Facultatif) |
| Gaine extérieure | Material | PVC / PE / LSZH (Halogen-free) |
| Performance | Rayon de courbure | ≥ 20D (Armored) / ≥ 15D (Unarmored) |
| Standards | Compliance | CEI 60502-2, GB/T 12706, GB/T 11017, CE, OIN 9001 |
Applications of XWA 35kV Cable
XWA 35kV cable supports direct burial, canal, tunnel and overhead installation. Strict partial discharge testing and quality inspection ensure stable operation under high voltage, heavy load and harsh environments.
- Industrial Power Distribution: Reliable power supply for heavy machinery, manufacturing lines, processing units, and factory automation systems, ensuring stable operation in demanding industrial environments.
- Mining Operations: Robust armored construction withstands harsh terrain, vibration, and potential mechanical damage, making it ideal for surface and underground mining power networks.
- Infrastructure & Public Utilities: Used in tunnels, airports, water treatment plants, transportation hubs, and urban grid upgrades to power pumps, lighting, and critical public services.
- Renewable Energy Projects: Connects wind turbine generators, solar farm inverters, and energy storage systems to the main power grid, supporting large-scale clean energy infrastructure worldwide.
- Commercial & High-Rise Buildings: Serves as the main distribution feeder for large commercial complexes, hospitals, data centers, and high-rise office buildings.
- Utility & Power Grids: Primary and secondary power distribution for municipal and industrial utility grids, including overhead, enterrement direct, and duct installations.
- Oil & Gas Projects: Reliable power transmission for offshore platforms, onshore processing facilities, and remote oilfield operations, with resistance to chemical corrosion and extreme weather.
- Railway & Transportation: Supplies stable power to high-speed rail, subway systems, and airport infrastructure, ensuring uninterrupted operation of transportation networks.
FAQs of 10kV Cable
What is the rated voltage of XWA 35kV cable, and what does U0/U 26/35kV mean?
The rated voltage of XWA 35kV cable is U0/U 26/35kV, in full compliance with IEC 60502-2 and GB/T 11017 normes.
- U0 (26kV): The maximum voltage that the cable insulation can withstand between the conductor and the earth (or metallic screen) during long-term operation.
- U (35kV): The maximum voltage between any two conductors of the cable during long-term operation.This voltage grade is specifically designed for 35kV high-voltage power transmission and distribution networks, ensuring safe and stable operation under high electric field stress.
What are the key installation requirements for XWA 35kV cable, especially for direct burial?
XWA 35kV cable supports direct burial, canal, tunnel, and overhead installations, with these critical requirements:
- Minimum bending radius: ≥ 20D (armored) or ≥ 15D (unarmored), where D is the cable outer diameter (stricter than 10kV cables to protect the thicker insulation).
- Burial depth: ≥ 1.0 meters (1.2 meters in traffic areas) to avoid mechanical damage and external stress.
- Protection layer: Sand cushion (≥ 100mm) and concrete/brick cover must be laid above the cable to prevent crushing.
- Avoidance: Keep away from chemical corrosion sources, high-temperature pipelines, and sharp objects to extend service life.
What is the design service life of XWA 35kV cable, and what factors affect it most?
Under rated operating conditions (compliant with IEC standards), XWA 35kV cable has a design service life of up to 40 années.Key factors affecting its lifespan:
- Operating temperature: Long-term operation above 90°C will accelerate XLPE insulation aging.
- Partial discharge: Poor manufacturing or installation can cause partial discharges, which gradually degrade the insulation.
- Environmental stress: UV radiation, chemical corrosion, and soil moisture will reduce insulation performance over time.
- Overload faults: Frequent short-circuit or overload events will damage the insulation and metallic screen.
Can XWA 35kV cable be customized for special project needs?
- Conducteur: High-purity copper or aluminum, cross-sections from 50mm² to 800mm².
- Isolation & sheath: XLPE/HEPR insulation, with PVC/PE/LSZH (halogen-free) sheath options.
- Armoring: SWA (steel wire armor) or STA (steel tape armor) for enhanced mechanical protection.
- Special features: Water-blocking layers, fire-resistant structures, or custom lengths (supplied on steel drums for long lengths).
What other medium voltage cables do you provide?
In addition to 35kV cable, we also supply 6kV MV cables, 10kV MV Cables, and other medium voltage cables based on project requirements.