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Our High Voltage Cable is engineered to deliver consistent power transmission over long distances while ensuring maximum safety and durability. Suitable for a wide range of applications, from electrical grids to industrial machinery, this cable is built to withstand the rigors of high-voltage environments.
The core of the cable is made of high-conductivity copper or aluminum, ensuring excellent power transfer efficiency. The insulation, typically made from cross-linked polyethylene (XLPE), provides high dielectric strength, making it ideal for underground installations or other applications that require superior insulation properties. The outer sheath is resistant to environmental stresses such as heat, moisture, and mechanical wear, ensuring longevity and continuous performance in harsh conditions.
This high voltage cable is designed with various armoring and sheathing options for enhanced protection, especially in high-risk environments. The robust structure helps prevent physical damage while maintaining the integrity of the electrical system. With excellent resistance to fire, chemicals, and extreme temperatures, this cable is a reliable choice for heavy-duty electrical installations.
Our High Voltage Cables meet international standards and are rigorously tested for performance, safety, and environmental compatibility. Whether you are working on a commercial power distribution project or industrial equipment, this cable guarantees seamless power delivery and protection.
| Feature | Specification |
|---|---|
| Voltage Rating | 10kV to 500kV |
| Conductor Material | Copper/Aluminum |
| Insulation Material | XLPE (Cross-Linked Polyethylene) |
| Sheath Material | PVC, PE, or XLPE (depending on the application) |
| Temperature Range | -40°C to +90°C |
| Fire Resistance | Yes, per IEC 60332-1 |
| Application | Power Distribution, Industrial Machinery |
| Core Configuration | Single-Core, Multi-Core |
| Armor Type | Armored, Unarmored |
| Compliance Standards | IEC, UL, RoHS, BS |
Improved Durability with top quality manufactured insulation ensuring full compliance with industry standards, designed to withstand extreme temperatures, moisture and physical harms
RRH Cable we have the capability to manufacture grade A 99.9% pure copper precisely stranded in the insulators for the best conductivity and efficiency
Thanks to our expert craftsmanship, we provide high-quality cables that minimize the need for frequent maintenance or replacements, significantly reducing long-term operational costs.

| Size (mm²) | AWG/kcmil | Voltage Class | Ampacity (A) | Insulation | Armor Type | Shielding | Conductor Material | Core Type | # Conductors | Temp Rating (°C) | # Strands |
| 95 mm² | 3/0 AWG | 66 kV | 300A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 19 |
| 120 mm² | 4/0 AWG | 66–110 kV | 340A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 19 |
| 150 mm² | 250 kcmil | 66–110 kV | 385A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 37 |
| 185 mm² | 350 kcmil | 110 kV | 440A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 37 |
| 240 mm² | 500 kcmil | 110–220 kV | 500A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 61 |
| 300 mm² | 600 kcmil | 220 kV | 560A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 61 |
| 400 mm² | 750 kcmil | 220–330 kV | 650A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 61 or 91 |
| 500 mm² | 1000 kcmil | 330–400 kV | 750A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 91 |
| 630 mm² | 1250 kcmil | 330–400 kV | 860A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper / Aluminum | Stranded | 1C | 90/130/250 | 91 or more |
| 800 mm² | 1600 kcmil | 400 kV | 1000A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper | Stranded | 1C | 90/130/250 | 127 |
| 1000 mm² | 2000 kcmil | 400–500 kV | 1150A | XLPE / EPR | Optional (SWA) | Copper wire screen | Copper | Stranded | 1C | 90/130/250 | 127+ |
Voltage Class Nominal system voltage the cable is rated for (66 kV, 110 kV, 220 kV, 400 kV, etc.)
Ampacity Maximum continuous current in ambient temperature of 20–30°C (varies by installation method)
Insulation Type XLPE = Cross-Linked Polyethylene (most common for HV); EPR = Ethylene Propylene Rubber (special uses)
Temperature Ratings 90°C (normal load), 130°C (emergency), 250°C (short circuit, max 5 sec)
Core Type Single-core (1C) is typical for High Voltage.
Strands High strand count improves flexibility and mechanical performance.
Transmission Lines carry power from generating stations to regional substations
Power Plants export high-power output to the transmission grid
Substations connect transformers and switching equipment at high voltage
Underground Transmission replace overhead lines in urban or protected areas
Renewable Energy (Offshore/Onshore) link large solar farms, wind farms, or offshore platforms to the grid
Industrial Mega-Facilities supply steel mills, chemical plants, and oil refineries with high-demand electricity
Cross-River and Subsea Links carry power under rivers, lakes, or between islands and mainland
Apply cable base on its insulation property
Always de-energize the system before working on cables
Proper PPE duing operation
| Feature | Why It Matters |
| Rated for 66–500 kV Voltage | Enables safe, efficient transmission of huge amounts of electrical power across long distances. |
| XLPE or EPR Insulation | Offers high dielectric strength, thermal resistance, and chemical resistance — essential for reliable high voltage operation. |
| Copper or Aluminum Conductors | Copper provides maximum conductivity and durability; aluminum offers lightweight, cost-effective solutions for long runs. |
| Stranded Conductor Design | Increases cable flexibility, reducing installation stress and improving vibration resistance during operation. |
| Single-Core Construction | Minimizes magnetic interference (EMI) and is easier to manage in high-current applications. |
| Metallic Shield (Copper Wire/Tape) | Ensures proper grounding and minimizes electromagnetic fields, improving system protection and safety. |
| Robust Outer Sheath (HDPE, PVC, LSZH) | Protects the cable against moisture, UV, chemicals, and mechanical damage during and after installation. |
| High Temperature Rating (90°C normal / 130°C overload / 250°C short circuit) | Allows cables to survive extreme fault conditions without failure, ensuring system stability. |
| Water-Blocked Design (Optional) | Prevents moisture ingress over decades of service life, critical for underground and underwater applications. |
| Armored Options Available | Adds mechanical strength for direct burial, tunnels, and offshore installations. |
| Long Operational Life (30–40+ years) | Reduces replacement needs, maintenance costs, and ensures long-term network reliability. |