Radial water barrier and a dynamic high voltage submarine cable for deep water applications
View Patent ↗A radial water barrier is provided for a dynamic high-voltage submarine cable. The water barrier includes a corrugated metal tube having an inner diameter in a range of 50-90 mm and a corrugation pitch in a range of 6-10 mm. The metal tube has a wall thickness in a range of 0.7-1 mm and a corrugation depth of more than 6 mm.
1. A radial water barrier for a dynamic high-voltage submarine cable, wherein the water barrier comprises a corrugated metal tube having an inner diameter in a range of 50-90 mm and a corrugation pitch in a range of 6-10 mm, wherein the metal tube has a wall thickness in a range of 0.7-1 mm and a corrugation depth of more than 6 mm.
2. The radial water barrier according to claim 1 , wherein the corrugation depth is more than 7 mm.
3. The radial water barrier according to claim 1 , wherein the corrugation depth is more than 8 mm.
4. The radial water barrier according to claim 1 , wherein the corrugation in a range of 6-9 mm.
5. The radial water barrier according to claim 1 , wherein the corrugation pitch is in a range of 6-8 mm.
6. The radial water barrier according to claim 1 , wherein the corrugation pitch is in a range of 7.2-10 mm.
7. The radial water barrier according to claim 1 , wherein the metal tube is made of copper, a copper alloy or stainless steel.
8. A dynamic high-voltage submarine cable for deep water applications, wherein a first end of the cable is adapted for connection to a floating platform and a second end of the cable is adapted for connection to a static cable, and the dynamic cable comprises at least one electrical conductor surrounded by an electrical insulation system and a radial water barrier arranged to prevent moisture to penetrate in the electrical insulation system and comprising a corrugated metal tube having an inner diameter between 50-90 mm and a corrugation pitch in a range of 6-10 mm, wherein the metal tube has a wall thickness in a range of 0.7-1 mm and a corrugation depth of more than 6 mm.
9. The dynamic power cable according to claim 8 , wherein the corrugation depth is more than 7 mm.
10. The dynamic power cable according to claim 8 , wherein the corrugation depth is more than 8 mm.
11. The dynamic power cable according to claim 8 , wherein the corrugation pitch is in a range of 6-9 mm.
12. The dynamic power cable according to claim 8 , wherein the corrugation pitch is in a range of 6-8 mm.
13. The dynamic power cable according to claim 8 , wherein the metal tube is made of copper, a copper alloy, or stainless steel.
14. Use of a radial water barrier according to claim 1 to prevent moisture from penetrate in the electrical insulation system of a dynamic high voltage cable in deep water applications.
15. Use of a radial water barrier according to claim 1 to prevent moisture from penetrate in the electrical insulation system of a dynamic high voltage cable in water applications deeper than 600 m.
16. Use of a radial water barrier according to claim 1 to prevent moisture from penetrate in the electrical insulation system of a dynamic high voltage cable in water applications deeper than 1000 m.
17. The radial water barrier according to claim 2 , wherein the corrugation in a range of 6-9 mm.
18. The radial water barrier according to claim 2 , wherein the corrugation pitch is in a range of 6-8 mm.
19. The radial water barrier according to claim 2 , wherein the corrugation pitch is in a range of 7.2-10 mm.
20. The radial water barrier according to claim 2 , wherein the metal tube is made of copper, a copper alloy or stainless steel.