Device for joining hybrid electrical transmission cables

Connecting device comprising:

• two hybrid electrical transmission cables each having stranded first conductive wires made of a first metal in the central zone of the cable and second conductive wires that are made of a second metal of higher hardness than that of said first metal and wound on said first conductive wires and outside this central zone,
• said second conductive wires of said cables being connected by an external conductive sleeve,
• wherein said central first wires of the cables are connected by a weld made of said first metal and connecting their end, this weld and this end being covered by a tube of metal of hardness equal to or higher than that of said second wires, at least partially in line with said sleeve, the end of said second wires being re-formed on said first wires and on said tube under said external conductive sleeve, said second wires at least partially covering said tube.