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Since the late 1960s we have been developing an entire range of XLPE (cross-linked polyethylene) insulated cables for high voltage-transmission. This kind of cable consists of a stranded copper or aluminum conductor with an extruded insulation system which is further protected by a metallic shield and an outer sheath. In submarine applications, the cable is normally designed with a lead sheath and outer steel-wire armor XLPE cables are predominantly used in underground networks, but are gradually replacing traditional paper-insulated, fluid-impregnated cables undersea, as well. They have several distinct advantages:
- Flexibility, lightness and strength
- No need for an auxiliary fluid-pressure system
- Low maintenance compared to fluid-impregnated cables
- Simpler accessories
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