High Voltage Cable

High voltage cable for underground transmission and grid connection projects.

66kV to 500kV

High Voltage Cable

As a professional high‑voltage cable manufacturer, RS provides 66kV‑500kV XLPE high‑voltage cables for power grid transmission, substation interconnection and underground power tunnel projects. Both copper and aluminum conductors are available, alongside multiple metallic sheath solutions to meet diverse project technical requirements.

RS professional engineering team custom‑designs every high‑voltage cable structure in compliance with specific operating voltage, conductor cross‑section, insulation grade, metallic sheath configuration, water‑blocking performance and on‑site routing conditions, catering to power transmission, new energy and special installation scenarios.

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HV Cable Product Selection

organizes HV cable production by voltage class, conductor system, sheath design and route condition, so each product page reflects a practical manufacturing and specification range.

66kV

36/66(72.5)kV XLPE cable for grid and substation connection.

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110kV

64/110(123)kV HV cable for transmission and utility projects.

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132kV Cable

132kV

76/132(145)kV XLPE cable under common IEC 60840 specifications.

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220kV Cable

220kV

127/220(245)kV high voltage cable for high-capacity power corridors.

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275kV Cable

275kV

160/275(300)kV EHV cable for transmission network projects.

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500kV Cable

500kV

290/500(550)kV cable class for major grid transmission systems.

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High voltage cable is produced for grid transmission, substation connection, renewable energy evacuation, industrial power intake and underground power corridors that require transmission-grade insulated cable systems. RS supplies HV power cable designs for voltage classes from 66kV to 500kV, with XLPE insulation, copper or aluminum conductors, metallic shielding or sheath systems and water-blocking options for international transmission work.For each HV cable design, RS reviews the rated voltage, short-circuit requirement, bonding arrangement, route environment, drum length and project specification before confirming the cable construction and production arrangement.

Transmission Voltage

66kV, 110kV, 132kV, 220kV, 275kV and 500kV designs for grid and utility-level power systems.

Screened XLPE System

Manufactured with conductor screen, XLPE insulation, insulation screen and metallic sheath options for controlled electric stress.

Route-Based Design

Factory configuration covers underground, substation, renewable grid connection, industrial intake and special transmission applications.

HV XLPE Cable Construction

RS produces XLPE HV cable with a fully screened insulation system to control electric stress. A typical single-core underground high voltage cable includes a compacted copper or aluminum conductor, conductor screen, XLPE insulation, insulation screen, metallic screen or metallic sheath, water-blocking layers and an outer sheath suitable for the route environment.

Conductor	Copper or aluminum compacted stranded conductor
Insulation System	Conductor screen, XLPE insulation and bonded insulation screen
Metallic Layer	Copper wire screen, corrugated aluminum sheath or lead sheath options
Water Blocking	Longitudinal water-blocking and radial water-barrier options
Outer Sheath	HDPE, MDPE, PVC, LSZH or semiconductive PE where specified

HV Cable Voltage Range and Technical Data

RS manufactures high voltage cable for transmission and grid-level power systems from 66kV to 500kV. IEC 60840 is normally used for extruded-insulation power cables above 30kV and up to 150kV, while IEC 62067 is normally used for extruded-insulation power cables above 150kV and up to 500kV. Factory documentation can be prepared around conductor size, insulation level, metallic sheath design, water blocking, bonding arrangement and routine testing requirements.

Voltage Class	Common Voltage Designation	Applicable Standard	Product Page
66kV	36/66(72.5)kV	IEC 60840 project specifications	66kV Cable
110kV	64/110(123)kV	IEC 60840 project specifications	110kV Cable
132kV	76/132(145)kV	IEC 60840 project specifications	132kV Cable
220kV	127/220(245)kV	IEC 62067 project specifications	220kV Cable
275kV	160/275(300)kV	IEC 62067 project specifications	275kV Cable
500kV	290/500(550)kV	IEC 62067 project specifications	500kV Cable

Manufacturing Reference Ranges

RS reviews laying method, soil thermal resistivity, ambient temperature, cable spacing, bonding mode and installation depth when preparing ampacity-related technical discussion. The values below are reference ranges for early project comparison.

RS reviews core count, conductor material, metallic screen area, armor type, laying method, ambient temperature, soil thermal resistivity and cable spacing when preparing ampacity-related technical discussion. The values below are reference ranges for early project comparison.

Voltage Class	Conductor Size Range	Reference Insulation Thickness	Approx. Overall Diameter	Reference Ampacity Range
66kV	185-1600mm²	10.5-13mm	55-95mm	360-1450A
110kV	240-2500mm²	16-18mm	68-115mm	430-1900A
132kV	400-2500mm²	17-20mm	77-117mm	485-2005A
220kV	630-2500mm²	24-27mm	103-134mm	622-1886A
275kV	800-2500mm²	27-30mm	115-145mm	760-2000A
500kV	1000-3000mm²	34-40mm	145-185mm	950-2600A

Underground, Submarine and Special Transmission Routes

As an international high voltage cable manufacturer, RS configures underground cable for urban transmission corridors, substation connections, industrial intake lines, renewable energy grid connection and routes where overhead transmission is restricted. Underground cable design considers route length, soil thermal conditions, cable spacing, pulling tension, joint bay layout, sheath bonding and protection against water ingress.

For submarine HV cable, RS configures route-specific mechanical protection, armoring, water-blocking and installation requirements. See Submarine Cable and HV Submarine Power/Optical Cable for this application group.