The present invention relates to a submarine cable having a bimetallic armor. In particular, the present invention relates to a submarine cable capable of effectively suppressing damage to and corrosion of an armor formed of different types of metals due to a local decrease in tensile strength thereof and capable of avoiding an increase in an external diameter of the cable, the structural instability of the cable, and damage to the cable during the manufacture and installation thereof.

The present invention relates to a submarine cable having a bimetallic armor. In particular, the present invention relates to a submarine cable capable of effectively suppressing damage to and corrosion of an armor formed of different types of metals due to a local decrease in tensile strength thereof and capable of avoiding an increase in an external diameter of the cable, the structural instability of the cable, and damage to the cable during the manufacture and installation thereof.

While laying a subsea cable, an exposed cut off end of the cable is exposed to water prior to permanently sealing off this cable end. To prevent damage to the cable due to contact with the often salt water, due to for example oxidation, a temporarily watertight seal is to be applied to the cut off end. A method for applying this seal is provided which comprises applying a mouldable sealant to the exposed end wherein the sealant acts as a watertight barrier between the water and the cut off end of the cable. The sealant may comprise an intermediate layer between the cut off end and a watertight outer layer arranged to increase adhesion between the cut off end and the outer layer. This allows a broader range of outer layer materials to be used as the outer layer material does not need to adhere directly with the cable.

While laying a subsea cable, an exposed cut off end of the cable is exposed to water prior to permanently sealing off this cable end. To prevent damage to the cable due to contact with the often salt water, due to for example oxidation, a temporarily watertight seal is to be applied to the cut off end. A method for applying this seal is provided which comprises applying a mouldable sealant to the exposed end wherein the sealant acts as a watertight barrier between the water and the cut off end of the cable. The sealant may comprise an intermediate layer between the cut off end and a watertight outer layer arranged to increase adhesion between the cut off end and the outer layer. This allows a broader range of outer layer materials to be used as the outer layer material does not need to adhere directly with the cable.

A deep sea lifting cable having a cable core (36) surrounded by armouring (32), wherein the armouring is surrounded by an outer jacket (33), wherein the cable core comprises at least one power cable (10) is disclosed. The armouring (32) comprises synthetic stiff ropes and interstices (35) between the stiff ropes are filed with a high viscous filler.

A deep sea lifting cable having a cable core (36) surrounded by armouring (32), wherein the armouring is surrounded by an outer jacket (33), wherein the cable core comprises at least one power cable (10) is disclosed. The armouring (32) comprises synthetic stiff ropes and interstices (35) between the stiff ropes are filed with a high viscous filler.

A metallic water barrier sheath for power cables for submarine or land applications is provided where the water barrier sheath comprises a metallic layer made of tin or a tin alloy.

An apparatus for indicating overstress in an electro-mechanical cable. The apparatus includes an overstress an overstress indicator cable including at least one non-twisted conductor disposed within a section of the electro-mechanical cable, where the non-twisted conductor is adapted to break when tension in the non-twisted conductor is greater than an allowable working load for the electro-mechanical cable.

An apparatus for indicating overstress in an electro-mechanical cable. The apparatus includes an overstress an overstress indicator cable including at least one non-twisted conductor disposed within a section of the electro-mechanical cable, where the non-twisted conductor is adapted to break when tension in the non-twisted conductor is greater than an allowable working load for the electro-mechanical cable.

A system comprises a trunk submarine cable, an offshore optical and power switching unit connected to the trunk submarine cable, and a plurality of feeder submarine cables connected to the offshore switching unit. The offshore switching unit is configured to dynamically connect data communication channels of a selected feeder submarine cable among the plurality of feeder submarine cables with data communication channels of the trunk submarine cable and to reconfigure power in the case of power faults.