描述

High Voltage Cables by RRH are built to handle 35-230kV, making them essential for long-distance energy transmission across power grids, between substations, and in large-scale infrastructure projects. These cables feature advanced insulation systems—often XLPE with semi-conductive layers—to prevent electrical breakdown under high stress, while their stranded conductors (aluminum or copper) minimize energy loss over miles. Designed for both overhead and underground use, they include weather-resistant jackets for outdoor installations and moisture barriers for underground trenches. RRH’s high voltage cables undergo rigorous testing for thermal cycling and short-circuit tolerance, ensuring reliability in extreme conditions. Ideal for connecting power plants to cities or interlinking regional grids, these cables balance efficiency and durability, playing a key role in maintaining stable electricity supply for millions.

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 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+

Definitions
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.

Product Uses
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

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 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                                    Allows cables to survive extreme fault conditions without failure, ensuring system stability.

(90°C normal / 130°C overload / 250°C short circuit)
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.