描述

Extra High Voltage Cables by RRH are designed for the most intensive power applications, operating at 800kV and above to serve large-scale utilities, industrial hubs, and super-sized infrastructure projects. These cables feature ultra-thick, high-performance insulation (such as oil-impregnated paper or advanced polymers) that can withstand extreme electrical fields, ensuring safe operation even under maximum load. The conductors, often made of high-purity copper or aluminum, are engineered for low resistance, enabling the transmission of massive power volumes—ideal for connecting large power plants to major substations or powering energy-intensive industries like steel manufacturing. RRH’s extra-high voltage cables include reinforced armor and corrosion-resistant jackets, making them suitable for harsh environments, including undersea installations. With strict adherence to global standards, these cables deliver unmatched reliability for critical, high-power infrastructure.

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
240 mm²       500 kcmil     110–220 kV         600–800 A  XLPE / Oil-PILC   Optional (SWA) Copper wire screen Copper / Aluminum    Single Core      1C              90/130/250            61–91
400 mm²       750 kcmil     110–230 kV       800–1000 A  XLPE / Oil-PILC    Optional (SWA) Copper wire screen Copper / Aluminum    Single Core      1C             90/130/250            91–127
630 mm²      1250 kcmil    220–330 kV    1000–1300 A  XLPE / Oil-PILC    Optional (SWA) Copper wire screen Copper / Aluminum     Single Core      1C            90/130/250                 127+
800 mm²     1600 kcmil    220–400 kV    1200–1400 A  XLPE / Oil-PILC    Optional (SWA) Copper wire screen            Copper                    Single Core      1C              90/130/250          127–169
1000 mm²    2000 kcmil   330–500 kV    1400–1700 A   XLPE / Oil-PILC  Optional (SWA) Copper wire screen            Copper                     Single Core      1C             90/130/250          169–200

Key Points
Armor Steel Wire Armor (SWA) optional for underground or mechanical protection.

Shielding Copper wire/tape screen around conductor and insulation to manage high voltage electric fields.

Insulation XLPE (modern dry type) or Oil-impregnated paper (PILC) for historical and special cases.

Core Type Generally single-core for EHV due to electrical field management; three-core cables rare at these voltages.

Stranding Multi-stranded (61–200 strands) to increase flexibility, reduce skin effect losses.

Temperature Ratings 90°C (continuous), 130°C (overload), 250°C (short-circuit, 5 sec).

Product Uses
Regional Power Transmission carries high volumes of electricity from major power plants to urban and industrial centers.

Urban Underground Transmission replaces overhead lines in cities where space is limited and aesthetics matter.

Renewable Energy Integration transfers wind, solar, and hydro power from generation sites to the main grid.

Substations Interconnection connects major substations to improve grid reliability and flexibility.

Industrial Megaprojects supplies heavy industries, data centers, and special economic zones needing very high power.

Airport and Metro Systems powers large transport systems efficiently without visible infrastructure.

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