High Voltage Cable

High Voltage (HV) Cables are designed to transmit electrical energy at voltages above 35 kV, typically ranging from 35 kV up to 500 kV or more. They are essential for moving large amounts of electricity over long distances between power generation facilities (like power plants, wind farms, hydroelectric dams) and major substations.

These cables are built with strong insulation layers, metallic screens, and robust jackets to withstand:

Very high electric stresses
Harsh environmental conditions
Mechanical forces during installation and operation

500 Meters(MOQ)
Please inquire for detailed specs and pricing.

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Product Description

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.

High Voltage Cable

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 (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.