HVDC Submarine Cable
- Conductor: Water-blocking Copper (Cu, Class 2/5 stranded)
- Conductor Screen: Semi-conductive extruded layer
- Insulation: Cross-linked Polyethylene (XLPE)
- Insulation Screen: Semi-conductive extruded layer
- Water-blocking Layer: Semi-conductive water-blocking tape (SWR-T)
- Optical Fiber Unit: Single-mode optical fibers (SMF, G.652D/G.655) integrated within the cable core
Product Introduction
HV Submarine Power/Optical Composite Cables are designed for high-voltage power transmission and simultaneous optical communication in offshore and subsea environments. They are widely used in:
- Offshore wind farm grid connection and internal communication
- Inter-island power and data transmission
- Coastal industrial facilities and offshore platform power supply
- Subsea renewable energy projects (solar, tidal)
- Long-distance subsea power and communication integration
These cables can be directly buried in seabed trenches, installed in submarine cable routes, or deployed in dynamic offshore applications, with excellent resistance to seawater corrosion, hydrostatic pressure, and mechanical stress.
CONSTRUCTION
- Conductor: Water-blocking Copper (Cu, Class 2/5 stranded)
- Conductor Screen: Semi-conductive extruded layer
- Insulation: Cross-linked Polyethylene (XLPE)
- Insulation Screen: Semi-conductive extruded layer
- Water-blocking Layer: Semi-conductive water-blocking tape (SWR-T)
- Optical Fiber Unit: Single-mode optical fibers (SMF, G.652D/G.655) integrated within the cable core
- Filler: Water-blocking filler compound
- Inner Lining: Extruded polymer layer
- Lead Sheath (LS): Continuous lead alloy sheath for primary water and gas barrier
- Semi-conductive PE Sheath: Extruded semi-conductive polyethylene layer
- Armour: Single/Double Wire Armour (SWA/DA, steel or aluminum alloy)
- Outer Sheath: High-density Polyethylene (HDPE) for marine environment protection
- Core Identification: Color-coded power cores and fiber units per IEC standards
CHARACTERISTICS
- Voltage Rating: 64/110(126) kV, 127/220(245) kV (customizable up to 500 kV)
- Temperature Rating:
- Conductor operating: 90°C (continuous)
- Short-circuit: 250°C (max 5 seconds)
- Water Resistance: Full longitudinal and radial water-blocking design
- Mechanical Strength: Suitable for deep-sea installation up to 3000m
- Corrosion Resistance: HDPE outer sheath resistant to seawater, marine organisms, and chemical attack
- Optical Performance: Low attenuation, high bandwidth for long-haul communication
- Flexibility: Minimum bending radius ≥ 15–20 × cable outer diameter (depending on armour type)
STANDARDS
- IEC 60840: Power cables with extruded insulation and their accessories for rated voltages from 30 kV (Uₘ = 36 kV) up to 150 kV (Uₘ = 170 kV)
- IEC 62067: Power cables with extruded insulation and their accessories for rated voltages above 150 kV (Uₘ = 170 kV)
- IEC 60794: Optical fibre cables
- ITU-T G.652/G.655: Characteristics of single-mode optical fibres
- ISO/IEC 17025: Testing and calibration laboratory competence
- ICEA S-97-682: Submarine power cable standards (North American market)
Types of Submarine Cable
Medium Voltage (MV) Submarine Power/Optical Composite Cable
MV Submarine Power/Optical Composite Cables are designed for medium-voltage power transmission and simultaneous optical communication in offshore and subsea environments.
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