MV Submarine Cable (Medium Voltage)

MV submarine power/optical composite cables are designed for medium-voltage power distribution in offshore and nearshore environments. With integrated optical fibers for monitoring and communication, they are ideal for offshore wind farms, island connections, and coastal infrastructure.

HV Submarine Power Cable (High Voltage)

HVDC submarine power/optical composite cables are built for long-distance, high-capacity transmission. As a high voltage submarine cable, they combine efficient power delivery with optical fibers for communication and system monitoring.

Submarine Cable: IEC Common Models & Structures

HVDC submarine power/optical composite cables are built for long-distance, high-capacity transmission. As a high voltage submarine cable, they combine efficient power delivery with optical fibers for communication and system monitoring.

MV (1kV＜Um≤52kV) | IEC 60502-4
HV (52kV＜Um≤300kV) | IEC 60840

Why Choose RS for Submarine Power Projects

When undertaking multi-million dollar offshore installations, cable reliability and manufacturing scale are non-negotiable. RS Power combines state-of-the-art manufacturing infrastructure with uncompromising marine-grade testing to deliver risk-free power transmission for your most demanding subsea projects.

Massive Continuous Manufacturing Capacity

Submarine cable integrity relies on continuous extrusion. RS Power has Vertical Continuous Vulcanization (VCV) extrusion lines and relies on massive, heavy-duty factory carousels designed specifically for extreme-length spooling.

• Production Output: Up to 300km per month of continuous, joint-free submarine cable.
• The RS Advantage: This massive continuous manufacturing capacity allows us to eliminate unnecessary factory splicing, significantly reducing subsea failure risks while ensuring rapid lead times for large-scale offshore wind and island interconnection projects.

Global Marine Certifications & Rigorous Laboratory Testing

Beyond standard IEC and IEEE compliance, RS Power’s subsea products are validated by the world’s most trusted maritime classification societies and third-party testing bodies. We do not just manufacture, we verify. Every meter of RS HVAC/HVDC submarine cable undergoes exhaustive Factory Acceptance Testing (FAT) before it is loaded onto a laying vessel. Our in-house testing capabilities include:

• Faraday Cage Partial Discharge (PD) Testing: Ensuring absolute zero insulation voids or impurities in the XLPE/EPR layers.
• High-Voltage AC/DC Withstand Testing: Exceeding maximum operational voltage limits to guarantee long-term reliability.
• Hydrostatic Pressure & Water Penetration Testing: Simulating deep-sea environmental pressures.
• Mechanical Tensile & Bending Cycle Testing: Ensuring the multi-layer armoring can withstand the extreme mechanical stress of installation and seabed movement.

Proven Offshore Track Record of Submarine Cables

RS Power cables currently secure energy transmission for critical marine infrastructure worldwide. Our teams are experienced in delivering complex subsea solutions on schedule.

• Offshore Wind Grid Connection: Supplied approximately 30km of 220 kV high‑voltage submarine cable for an offshore wind farm in Spain, ensuring reliable, high-capacity power transfer from the offshore substation to the mainland grid.
• Offshore Oil & Gas: Engineered customized, anti-corrosion subsea cables for a deepwater platform in the Gulf of Mexico, ensuring uninterrupted power supply in harsh, highly corrosive saltwater environments.

Application Categories of Submarine Cables

Offshore Renewable Energy Submarine Cables

RS Power offshore renewable energy submarine cables are engineered for offshore wind farms, floating photovoltaic power stations and tidal energy projects, complying with IEC 60502-4/IEC 60840 standards with marine-grade HDPE sheaths and double steel wire armoring (33 code). Designed for farshore/nearshore grid connection, these submarine cables feature anti-UV, anti-salt spray and water-blocking structures, supporting 6/10kV to 290/500kV MV/HV/EHV voltage ratings, and realize stable power transmission for renewable energy projects from sea to onshore grids, with optional integrated fiber optic units for real-time operation monitoring. Ideal for offshore wind farm clusters, coastal renewable energy bases and cross-sea clean energy transmission links.

Coastal & Interconnection Submarine Cables

As the core solution for coastal grid interconnection, island power supply, intercity cross-sea power transmission and nearshore industrial park undersea power links, RS Power coastal & interconnection submarine cables adopt compacted copper/aluminium water-blocked conductors and marine XLPE/TR-XLPE insulation, adapting to shallow-sea tidal scouring and seabed mechanical impact. Covering 0.6/1kV to 127/220kV voltage ranges, these submarine cables are available in single/double steel wire armoring configurations, suitable for mud/sandy seabed laying in nearshore (≤5km) and medium-distance (5-50km) cross-sea scenarios, and are the mainstream choice for municipal coastal power grid construction, island electrification and cross-bay power network linkage projects worldwide.

Offshore Industrial & Special Marine Submarine Cables

RS Power offshore industrial & special marine submarine cables are customized for offshore oil/gas platforms, subsea mining equipment, marine engineering facilities and coastal port power supply, with optional flame-retardant marine LSZH sheaths, anti-corrosion asphalt-PP rope protection and EPR insulation for extreme marine conditions. Supporting low/medium/high voltage ratings (0.6/1kV to 64/110kV), these submarine cables feature high tensile, anti-hydrostatic pressure and anti-marine biological corrosion performance, and are applicable to deep-sea industrial equipment power supply, subsea control system signal transmission and offshore industrial park undersea power distribution, meeting the special technical requirements of offshore industrial projects for safety, reliability and long-term operation in harsh marine environments.