220kV Cable

220kV Cable

  • RS 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, RS 220kV EHV cable minimizes dielectric losses while maintaining long-term reliability under continuous high electrical stress.
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Product Introduction

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.

RS 220kV Cable Size Datasheet

XWA HV Cable Structure

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 RS for 220kV Transmission Projects?

220kV systems operate at a level where design margins are tighter and failure costs are significantly higher. RS 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, RS has developed deep technical know-how and production stability for large-scale grid projects worldwide.
  • Factory-Direct Pricing Advantage
    As a direct manufacturer, RS eliminates intermediary costs, offering competitive cable pricing for large infrastructure projects while maintaining strict quality and compliance standards.
  • Complete System Support
    Beyond cable supply, RS provides integrated solutions including accessories, technical consultation, and installation guidance to ensure seamless project execution.

XWA Cable Factory

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.

Cables Applications

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.

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