1. High-Voltage Power Transmission
HVAC/HVDC Cables
- 220kV XLPE Insulated (IEC 63026/CIGRE TB 490):
- Type: HVAC (Alternating Current)
- Capacity: 500 MW
- Design: Triple-layer HDPE armor, carbon-coated conductor.
- Applications: Offshore wind farm interconnections, island power links.
- ±525kV XLPE HVDC (CIGRE TB 623):
- Type: HVDC (Bipolar Direct Current)
- Capacity: 2000 MW
- Depth Rating: 2000m
- Certifications: DNVGL-ST-0359, IEC 62895.
- Applications: Long-distance undersea grid interconnects (e.g., cross-continental).
Deep-Sea Mining Power Cables
- Titanium-Armored Cables (DNV-OS-E402):
- Voltage: 6.6kV
- Depth Rating: 3000m
- Design: Titanium alloy braid, dynamic bend radius <5D.
- Applications: Subsea mining ROVs, crawler systems.
- Hybrid Power+Control Cables:
- Voltage: 3.3kV + 24V control
- Certifications: ISO 13628-5, API 17F.
- Features: Torsion-resistant, polyurethane jacket for abrasion protection.
2. Fiber Optic Submarine Cables
Long-Haul Communication
- OS2 G.654 (ITU-T G.973):
- Fiber Type: Single-mode
- Span: 200km (unrepeatered)
- Attenuation: ≤0.17 dB/km @1550nm
- Applications: Transoceanic backbone networks, hyperscale data links.
- 24-Fiber SDM (Space Division Multiplexing, ITU-T G.977.2):
- Capacity: 250 Tbps per pair
- Design: 16-core fiber, reduced cable diameter.
- Features: Earthquake-resistant, compatible with SDM transceivers.
Branching & Shallow-Water Solutions
- Branching Unit Cables (ITU-T G.977.1):
- Voltage: 10kV DC (repeater power)
- Design: Splice-free power/signal integration.
- Applications: Submarine cable branching networks.
- Armored Shallow-Water Cables:
- Depth Rating: 500m
- Design: Double-layer galvanized steel armor, PE sheath.
- Applications: Coastal telecom, offshore oil platform connectivity.