A submarine cable system includes a submarine cable with two energy lines between two distal ends. An energy line includes a stranded wire and an insulation layer surrounding the stranded wire. The two energy lines are guided in a common metallic reinforcement surrounded by an outer insulation layer. A first section of the submarine cable is formed starting from a first of the distal ends of the submarine cable to a transition region. A second section is formed starting from the transition region to a second of the distal ends of the submarine cable. A sleeve-shaped transition piece has through opening with the transition region disposed within the through opening. A cable duct has an opening formed to receive the transition piece such that an outer shell surface of the transition piece abuts an inner shell surface of the cable duct in the region of the opening.