PRYSMIAN GROUP | 525 kV HVDC XLPE DATASHEET | Submarine CONDUCTOR Bare copper wires filled with sea-grade water blocking compound, with nominal cross-section area up to 3500 mm². Aluminum is also available. INSULATION Low peroxide XLPE. METALLIC SHEATH The insulated core has a lead alloy sheath applied over the longitudinal water barrier. ARMOUR Single or double layer of galvanized steel round wires, flushed with bitumen as further anti-corrosion protection. Double steel layer or Composite armour designs for high depth applications are also available. SERVING Two layers of polypropylene strings, to protect against abrasion and reduce cable friction. INNER SEMI-CONDUCTIVE LAYER Water-swellable tapes and extruded semi-conducting screen layer, to have a smooth electrical interface with insulation. OUTER SEMI-CONDUCTIVE LAYER Water-swellable tapes and extruded semiconducting screen layer, to have a smooth electrical interface with insulation. ANTI-CORROSION SHEATH An extruded layer of insulating polyethylene compound; to avoid any electrical breakdown by induced over-voltages, the metallic sheath is short-circuited with the armour wires at intermediate distances. Semiconductive polyethylene is also available. INTEGRATED FO CABLE Up to 4 integrated fiber optic elements for monitoring purposes, able to accommodate both multi-mode and single-mode fibers. Dimensional data for 2500 mm2 copper Electrical data for 2500 mm2 copper Indicative diameter 160 mm Indicative cable weight 65 kg/m Ohmic resistance 0.0072 Ω/km Coaxial inductance 0.15 mH/km Capacitance 0.22 µF/km
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