描述

Ultra High Voltage Cables from RRH are engineered for the most demanding energy transmission needs, operating at 230-800kV to support mega-grids and cross-country power networks. These cables leverage cutting-edge technology, including low-loss insulation materials and optimized conductor designs, to minimize energy dissipation over thousands of miles—critical for connecting remote renewable energy sources (like wind farms or solar parks) to urban centers. The robust construction includes metal sheaths for electromagnetic shielding and armor layers to withstand extreme environmental stress, from freezing temperatures to desert heat. RRH’s ultra-high voltage cables are customizable for both AC and DC systems, making them versatile for international projects. Whether powering a nation’s grid or enabling cross-border energy trade, these cables set the standard for high-capacity, long-haul electricity transmission.

Product Advantage

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.

Technical Parameters

Size (mm²)    AWG/kcmil     Voltage Class   Ampacity (A)       Insulation                  Armor                Shielding        Conductor Material    Core Type # Conductors Temp Rating (°C) # Strands
800 mm²         1600 kcmil       500–600 kV     1000A      XLPE / Oil-impregnated    Optional (SWA/STA)  Copper wire screen     Copper           Stranded        1C           90/130/250             127
1000 mm²       2000 kcmil       500–800 kV     1150A       XLPE / Oil-impregnated    Optional (SWA/STA)  Copper wire screen     Copper           Stranded        1C           90/130/250             127+
1200 mm²        2500 kcmil      600–800 kV     1300A       XLPE / Oil-impregnated    Optional                         Copperwire screen       Copper            Stranded       1C            90/130/250             127+
1600 mm²        3200 kcmil      800–1100 kV     1600A      XLPE / Oil-impregnated   Optional                         Copper wire screen      Copper             Stranded      1C            90/130/250            127–169
2000 mm²      4000 kcmil       800–1100 kV     1900A     XLPE / Oil-impregnated     Optional                        Copper wire screen       Copper            Stranded      1C            90/130/250            169–20

Key Points
Voltage Range: 500 kV to 1100 kV (AC or DC systems)

Purpose: Efficiently transmit large amounts of power with minimal losses.

Types:

AC UHV cables (usually underground for urban areas)

DC UHV cables (for ultra-long distances, submarine, or cross-country transmission)

Conductor Material: Typically high-conductivity copper or aluminum.

Insulation: Advanced XLPE (cross-linked polyethylene) or oil-impregnated paper insulation for extreme electrical and thermal stress.

Applications: National grid backbones, renewable energy transmission, interconnection of countries, offshore wind, underground city supply.

Product Uses
Long-Distance Power Transmission carries bulk electricity from remote generation (hydropower, solar farms, wind farms) to cities.

National and Intercontinental Grids connects grids across states or countries with minimal losses.

Renewable Energy Projects moves clean energy (wind, hydro, solar) from faraway locations to populated centers.

Urban Bulk Power Delivery, underground or underwater UHV cables bring large power supplies into crowded cities where overhead lines aren’t possible.

HVDC Systems (High Voltage Direct Current) essential for modern DC transmission corridors that cross mountains, seas, or deserts.

Offshore Wind Farms and Islands transfers huge power outputs from offshore platforms to mainland grids.

Product Operate Guide
Apply cable base on its insulation property

Always de-energize the system before working on cables

Proper PPE duing operation

Key Features

Feature                                                                                                                                                 Why It Matters
Rated for 500 kV to 1100 kV                                                     Enables ultra-long distance and large-scale power transmission with minimal losses.
Advanced XLPE or Oil-Impregnated Insulation                  Withstands extreme electrical and thermal stress, ensuring cable reliability under UHV conditions.
Copper or Aluminum Conductors                                           Offers the best balance between conductivity (copper) and weight/cost efficiency (aluminum).
Stranded, High-Purity Conductors                                          Improves flexibility, reduces skin effect losses at very high frequencies.
Single-Core Design                                                                      Reduces magnetic fields, simplifies electrical behavior at ultra high voltages.
Metallic Shielding                                                                        Provides electromagnetic containment and fault protection, ensuring safe operation.
Armored Options Available                                                       Enhances mechanical protection, especially important for underground or submarine cables.
High Thermal Ratings                                                                Maintains operational stability during overloads or faults without immediate damage.

(90°C Normal, 130°C Overload, 250°C Short Circuit)
Water Blocking and Sealing Systems                                      Extends cable life by preventing moisture ingress, critical for underground/submarine use.
Low Loss Dielectric Design                                                       Minimizes energy loss during transmission, improving system efficiency and reducing operating costs.
Design Life 40–50+ Years                                                         Provides a reliable, long-term investment for national grids and megaprojects.

Notes
Term                                                                                                                                       Meaning
Armor                                                                          SWA = Steel Wire Armor; STA = Steel Tape Armor; usually optional for underground/submarine.
Shielding                                                                     Copper tape or copper wire screen around each conductor, critical for UHV to manage high electrical fields.
Insulation                                                                   XLPE (modern dry type); Oil-impregnated (historical type for some UHV AC or DC systems).
Core Type                                                                   Almost always single core (1C) for UHV to avoid phase interference.
Temperature Ratings                                              90°C normal operation, 130°C emergency overload, 250°C short-circuit condition.
Stranding                                                                   High-strand count to improve cable flexibility, reduce skin effect, and ease installation stress.