Abstract: A cable includes a plurality of elongated sections each composed of a tubular electric conductor, electric insulation surrounding the electric conductor, and an outer cable jacket surrounding the electric insulation. An inner tubular member of titanium or alloyed stainless steel is accommodated in the electric conductor and defines a channel for a cooling medium such as water. The inner tubular members of each two consecutive cable sections have flanges that are welded or soldered to one another, and a bridging element is interposed between the electric conductors of the two consecutive electric conductors and welded or soldered thereto. The electric conductor preferably is a circumferentially complete one-piece tubular element extruded onto the inner tubular member.

Abstract: A power-transmission system connects a source of electrical energy to an electrical load. The power-transmission system is comprised of a first cable system driven above its natural power and a second cable system connected in series with the first cable system and driven below its natural power.

Abstract: A cable includes a tubular multi-layer electric conductor, electric insulation surrounding the electric conductor, and an outer cable jacket surrounding the electric insulation. An inner tubular member of titanium or alloyed stainless steel is accommodated in the electric conductor and defines a channel for a cooling medium such as water. At least one of the layers constituting the electric conductor is a circumferentially complete tubular element surrounding or surrounded by a layer comprising a plurality of juxtaposed elongated electric conductor elements. In the region of contact of the electric conductor with the inner tubular member, there is provided at least one groove extending longitudinally of the cable for conducting the cooling medium which escapes from the cooling channel in case of damage to the inner tubular member to the ends of the cable so as to indicate the occurrence of such damage.

Abstract: An internally cooled high-energy cable is equipped with terminal connector assemblies for supplying electric current thereto and withdrawing the current therefrom, and with terminal connector assemblies for supplying a cooling medium to the cable and discharging the spent cooling medium therefrom. A connecting pipe connects the two assemblies at each end of the cable and conducts the cooling medium from one to the other. The flow-through cross section of the channel for conducting the cooling medium through the cooling medium terminal connector assembly is smaller than the flow-through cross section of the cooling channel of the cable which results in more rapid flow of the cooling medium through the former channel and in enhanced cooling effect, so that the heat resulting from the decline in the electric potential of the cooling medium in the cooling medium terminal connector assembly is effectively dissipated.

Abstract: A cable includes a tubular multi-layer electric conductor, electric insulation surrounding the electric conductor, and an outer cable jacket surrounding the electric insulation. An inner tubular member of titanium or alloyed stainless steel is accommodated in the electric conductor and defines a channel for a cooling medium such as water. At least one of the layers constituting the electric conductor is a circumferentially complete tubular element surrounding or surrounded by a layer comprising a plurality of juxtaposed elongated electric conductor elements. In the region of contact of the electric conductor with the inner tubular member, there is provided at least one groove extending longitudinally of the cable for conducting the cooling medium which escapes from the cooling channel in case of damage to the inner tubular member to the ends of the cable so as to indicate the occurrence of such damage.

Abstract: A cable for transmitting high electric energies comprises an inner tubular member which is provided with a channel for conducting a cooling medium, cable jacket surrounding the tubular member with spacing, and insulation provided intermediate said tubular member and cable jacket. The tubular member is circumferentially complete so that no cooling medium can escape into the insulation and destroy the insulating properties thereof. The tubular member may itself serve as an electric conductor, or it may be surrounded by an electric conductor.

Abstract: A cable for transmitting high electric energies comprises an inner tubular member which is provided with a channel for conducting a cooling medium, an outer tubular member surrounding the inner tubular member, a cable jacket surrounding the outer tubular member with spacing, and an insulation provided intermediate the outer tubular member and the cable jacket. The inner and outer tubular members are circumferentially complete so that the cooling medium cannot escape into the insulation and cause damage thereto. The inner tubular member may itself serve as an electric conductor, or a separate electric conductor may be situated intermediate the inner and the outer tubular members.