HVAC submarine cables are widely used in the offshore connections with higher transmitted power for offshore wind farm and power transmission between mainland and island.
ZTT is proficient in manufacturing HVAC submarine cables for both three-cores and single core types and has an average annual capacity of 500km. ZTT has supplied more than 1,000 km HV submarine power cables since 2009, including three cores 220 kV and single core 500 kV cable.
Circular stranded copper or aluminum conductor constructed of round or profiled wires.
Max. CSA 3000sq.mm
Cross-linked polyethylene (XLPE)
30kV≤U≤66kV: Copper wire, lead alloy sheath
U≥110kV: Lead alloy sheath
Radial water barrier:
Semi-dry design: Laminated aluminum foil
Dry design: Lead alloy sheath
Three-core: Galvanized steel wire
Single-core: Magnetic galvanized steel wire; Non-magnetic HD copper wire, stainless steel wire
Armor bedding & serving:
IEC 60840, IEC 62067
ICEA S 108-720
CIGRE 490, CIGRE 623
-Power supply from onshore substation to offshore oil & gas platform
-Connection between offshore oil & gas platforms
-Interconnecting grids of countries
-Power supply from mainland to isolated islands
-Export cable to transport the total generated power from offshore substation to onshore substation
ZTT has the capability to manufacture long continuous length HVAC submarine cables without factory splices as it is equipped with the state-of-the-art VCV lines, vertical assembly lines with big carousels and enough outdoor storage carousels for completed cables. Moreover, the wharf is only 80 meters from the storage carousels, which can minimize the risk during cable load out.