XWA 220kV Cable | EHV XLPE Cable
Powering Long-Distance Transmission at Scale
XWA 220kV cable is developed for extra high voltage (EHV) transmission systems, where stability, distance, and load intensity go far beyond conventional grid requirements. Rated at 127/220 kV (Um 245 kV), this cable is designed to serve as a primary transmission artery, enabling efficient bulk power transfer between major substations and across regions. With enhanced insulation structure and optimized electrical design, XWA 220kV EHV cable minimizes dielectric losses while maintaining long-term reliability under continuous high electrical stress.
220kV Cable Specifications & Construction
- Conductor: Precision-compacted aluminium or copper conductors (630–2500 mm²) designed to reduce AC resistance and optimize current distribution under high load conditions.
- Insulation: High-performance extruded XLPE (Cross-linked Polyethylene) insulation.
- Customizable Metallic Sheath (Optional): Configurable as extruded lead, copper wire screen with aluminum foil barrier, or welded aluminum, based on short-circuit and soil moisture needs.
- Outer Sheath: Extruded PE (Polyethylene) for robust defense against chemical agents and mechanical wear.
- Rated Voltages: Uo/U 127/220 kV, maximum system voltage Um 245 kV.
- Operating Capacitance: Ranging from 0.14 µF/km to 0.27 µF/km depending on conductor size.
- Charging Current: Ranging from 5.6 A/km to 10.8 A/km.
XWA 220kV Cable Size Datasheet
| Conductor Type | Cross-Section (mm²) | Outer Diameter (mm) | Net Weight with Pb Sheath (kg/m) |
|---|---|---|---|
| Aluminium | 630 | 107 | 18.9 |
| Copper | 630 | 103 | 23.1 |
| Aluminium | 1000 | 108 | 21.3 |
| Copper | 1000 | 111 | 27.9 |
| Aluminium | 1600 | 123 | 25.7 |
| Copper | 1600 | 127 | 36.6 |
| Aluminium | 2500 | 130 | 31.5 |
| Copper | 2500 | 134 | 48.0 |
Why Choose XWA for 220kV Transmission Projects?
220kV systems operate at a level where design margins are tighter and failure costs are significantly higher. XWA Cable Factory focuses on engineering reliability into every layer of the cable system.
- Optimized Electric Field Control
The insulation and shielding structure is engineered to maintain a uniform electric field, minimizing partial discharge and extending operational lifespan under high electrical stress. - Low-Loss Transmission Efficiency
Carefully selected conductor materials and optimized geometry reduce both resistive and dielectric losses, improving efficiency over long-distance transmission routes. - Engineered for Complex Installations
Suitable for demanding environments such as underground corridors, buried ducts, and utility tunnels where heat dissipation and space constraints are critical factors. - 15+ Years Cable Manufacturing Expertise
With over a decade of specialization in high and extra high voltage cables, XWA has developed deep technical know-how and production stability for large-scale grid projects worldwide. - Factory-Direct Pricing Advantage
As a direct manufacturer, XWA eliminates intermediary costs, offering competitive cable pricing for large infrastructure projects while maintaining strict quality and compliance standards. - Complete System Support
Beyond cable supply, XWA provides integrated solutions including accessories, technical consultation, and installation guidance to ensure seamless project execution.
Typical Applications of 220kV Cable
220kV cables are used where high-capacity transmission, long-distance efficiency, and grid reliability are critical.
- Primary Transmission Corridors
Carrying bulk power between substations over long distances. The higher voltage reduces current and losses, improving transmission efficiency. Used with prefabricated joints and terminations for stable system connections. - Power Plant Evacuation Systems
Transferring continuous high output from large power plants into the grid. Commonly connected to GIS or AIS substations with matched cable accessories for insulation coordination. - Renewable Energy Export
Linking offshore wind and large solar plants to the grid. Often combined with fiber optic monitoring (DTS) and water-blocked designs for real-time performance and environmental protection. - Underground Urban Transmission
Installed in tunnels, ducts, or direct burial where overhead lines are not feasible. High voltage allows more power transfer within limited space, supported by thermal and bonding system design. - Grid Reinforcement Projects
Increasing capacity of existing networks without new corridors. Typically applied with cross-bonding and surge protection systems to ensure safe and stable operation.
Installation & Support
Due to their size and operating stress, 220kV cables require precise installation planning:
- Bending Radius: Typically 2.7m – 3.4m, depending on conductor size.
- Thermal Environment: Installation design must consider soil thermal resistivity and heat dissipation.
- Handling Requirements: Heavy cable weight demands controlled laying tension and specialized equipment.
- System Design: Cable spacing and laying formation (trefoil/flat) directly impact current capacity.
Our team of technical experts is available to answer your questions, provide custom solutions, and support your project from planning to installation.
FAQs of XWA 220kV EHV Cable
Why is 220kV considered extra high voltage?
A: Because it operates at a level where insulation design, electric field control, and system reliability require significantly more advanced engineering than lower voltage classes.
Is 220kV suitable for underground transmission?
A: Yes. It is widely used in urban and environmentally sensitive areas, typically installed in ducts, tunnels, or direct burial systems with proper thermal design.
How long is the service life of a 220kV cable?
A: Under proper design, installation, and operating conditions, XLPE-insulated 220kV cables typically have a service life of 30–40 years or more.
What makes 220kV cable design more complex than 132kV?
A: Higher voltage results in stronger electric fields, requiring thicker insulation, more precise shielding design, tighter manufacturing tolerances, and more rigorous testing procedures.
What other extra high voltage cables can XWA supply?
A: XWA offers a full EHV range with manufacturing capability up to 500kV, suitable for national grid and large-scale transmission projects.
How does your factory maintain competitive pricing on EHV cables?
A: Because we are the direct manufacturer with over 15 years of optimized production experience, we eliminate third-party and middleman markups. This direct-to-buyer model allows us to offer highly competitive, cost-effective pricing for national-level infrastructure bids while strictly adhering to IEC performance and safety standards.
Can the cable be customized per project?
A: Yes. Conductor size, sheath type, and structural design can all be tailored to meet specific grid, environmental, and installation requirements.