Copper alloy water-blocking layer for a subsea power cable

摘要

In a subsea power cable, particularly an HVDC power cable, each conductor core 2 is surrounded by a corrugated water-blocking layer 4. The water-blocking layer is composed of a copper alloy rather than copper so as to provide superior cracking resistance.  The copper alloy may comprise copper alloyed with nickel, manganese, beryllium, zinc, aluminium. In particular copper alloys C70600, C75100, C17000, C71640, C68800 or C26000 may be used.  A method of manufacturing the cable and a method of transmitting electricity with the cable is also described.