Abstract: A cable connecting structure includes three three-phase power cable pairs respectively including a pair of power cables that are mutually connected, three insulating rubber connecting tubes covering connecting sections of the three three-phase power cable pairs, respectively, a steel pipe accommodating portions of each of the three three-phase power cable pairs, and the three rubber connecting tubes, and a heat dissipation material. The heat dissipation material is provided between the steel pipe and each of the three rubber connecting tubes, and makes contact with the steel pipe and each of the three rubber connecting tubes. The heat dissipation material includes a heat dissipating metal that has a melting point lower than a melting point of the steel pipe.

Abstract: A cable connecting structure includes three three-phase power cable pairs respectively including a pair of power cables that are mutually connected, three insulating rubber connecting tubes covering connecting sections of the three three-phase power cable pairs, respectively, a steel pipe accommodating portions of each of the three three-phase power cable pairs, and the three rubber connecting tubes, and a heat dissipation material. The heat dissipation material is provided between the steel pipe and each of the three rubber connecting tubes, and makes contact with the steel pipe and each of the three rubber connecting tubes. The heat dissipation material includes a heat dissipating metal that has a melting point lower than a melting point of the steel pipe.

Abstract: A fluid sealing device for sealing an opening of an installation pipe in which at least a long object is installed includes: a flange configured to close the opening of the installation pipe, the flange having a hole through which the long object is made to pass, and the flange having a stop face that is continuous with and at an angle to an inner surface of the hole; one or more sealing members configured to be disposed on an outer periphery of the long object and configured to exert an urging force toward an axial center of the long object upon being compressed in an axial direction of the long object, thereby sealing a gap between the flange and the long object; and a clamping member configured to press the one or more sealing members toward the stop face.

Abstract: A power cable to be provided inside a steel pipe that is electrically connected to a reference potential node, includes 3 transmission cables, 3 ground buses making contact with outer peripheral surfaces of adjacent transmission cables and arranged at 3-fold rotationally symmetrical positions with respect to a center of the transmission cables in a cross sectional view, a binder covering the ground buses and the transmission cables, and a jacket provided to overlap the binder. The transmission cables have outer diameters to inscribe a first circle having a radius corresponding to a radius of a second, envelope circle of the power cable having a maximum radius inside the steel pipe, but excluding thicknesses of the binder and the jacket. The ground buses have outer diameters to project outwardly of an envelope closed curve of the transmission cables, but less than or equal to a diameter of the first circle.

Abstract: A power cable to be provided inside a steel pipe that is electrically connected to a reference potential node, includes 3 transmission cables, 3 ground buses making contact with outer peripheral surfaces of adjacent transmission cables and arranged at 3-fold rotationally symmetrical positions with respect to a center of the transmission cables in a cross sectional view, a binder covering the ground buses and the transmission cables, and a jacket provided to overlap the binder. The transmission cables have outer diameters to inscribe a first circle having a radius corresponding to a radius of a second, envelope circle of the power cable having a maximum radius inside the steel pipe, but excluding thicknesses of the binder and the jacket. The ground buses have outer diameters to project outwardly of an envelope closed curve of the transmission cables, but less than or equal to a diameter of the first circle.

Abstract: A fluid sealing device for sealing an opening of an installation pipe in which at least a long object is installed includes: a flange configured to close the opening of the installation pipe, the flange having a hole through which the long object is made to pass, and the flange having a stop face that is continuous with and at an angle to an inner surface of the hole; one or more sealing members configured to be disposed on an outer periphery of the long object and configured to exert an urging force toward an axial center of the long object upon being compressed in an axial direction of the long object, thereby sealing a gap between the flange and the long object; and a clamping member configured to press the one or more sealing members toward the stop face.

Abstract: A power cable includes a conductor; an insulator; an inner shield layer; an inner corrosion-proof layer; an outer shield layer; and an outer corrosion-proof layer, provided from center toward outside, wherein only the inner shield layer among the inner shield layer and the outer shield layer is directly grounded at one end of the power cable in an axial direction, and wherein only the outer shield layer among the inner shield layer and the outer shield layer is directly grounded at the other end of the power cable in the axial direction.

Abstract: A pipe type solid insulation cable system includes a plurality of solid insulation cables; a plurality of steel pipes in which the plurality of solid insulation cables are inserted, respectively; and a refrigerant circulation path that includes a plurality of refrigerant pipes, which are provided to be adjacent to the plurality of steel pipes, respectively, circularly connected with each other to circulate a refrigerant therein, wherein the pipe type solid insulation cable system is configured to indirectly cool the plurality of solid insulation cables in the plurality of steel pipes, respectively, by cooling at least a part of a periphery of each of the plurality of steel pipes by the refrigerant circulation path without flowing the refrigerant in the plurality of steel pipes.

Abstract: A power cable includes a conductor; an insulator; an inner shield layer; an inner corrosion-proof layer; an outer shield layer; and an outer corrosion-proof layer, provided from center toward outside, wherein only the inner shield layer among the inner shield layer and the outer shield layer is directly grounded at one end of the power cable in an axial direction, and wherein only the outer shield layer among the inner shield layer and the outer shield layer is directly grounded at the other end of the power cable in the axial direction.

Abstract: A pipe type solid insulation cable system includes a plurality of solid insulation cables; a plurality of steel pipes in which the plurality of solid insulation cables are inserted, respectively; and a refrigerant circulation path that includes a plurality of refrigerant pipes, which are provided to be adjacent to the plurality of steel pipes, respectively, circularly connected with each other to circulate a refrigerant therein, wherein the pipe type solid insulation cable system is configured to indirectly cool the plurality of solid insulation cables in the plurality of steel pipes, respectively, by cooling at least a part of a periphery of each of the plurality of steel pipes by the refrigerant circulation path without flowing the refrigerant in the plurality of steel pipes.

Abstract: A power cable includes a steel pipe coupled to a reference potential node, three transmission cables within the steel pipe and respectively including a conductor to transmit three-phase alternating current power, and a return cable within the steel pipe and coupled to the reference potential node. Each of the three transmission cables includes a first insulating layer covering the conductor, a metal layer covering the first insulating layer, and a second insulating layer covering the metal layer. The three transmission cables are twisted around a periphery of the return cable along a longitudinal direction of the return cable, and the metal layer is coupled to the reference potential node.

Abstract: A power cable includes a steel pipe coupled to a reference potential node, three transmission cables within the steel pipe and respectively including a conductor to transmit three-phase alternating current power, and a return cable within the steel pipe and coupled to the reference potential node. Each of the three transmission cables includes a first insulating layer covering the conductor, a metal layer covering the first insulating layer, and a second insulating layer covering the metal layer. The three transmission cables are twisted around a periphery of the return cable along a longitudinal direction of the return cable, and the metal layer is coupled to the reference potential node.

Abstract: A power cable includes a steel pipe coupled to a reference potential node, three transmission cables within the steel pipe and respectively including a conductor to transmit three-phase alternating current power, and a return cable within the steel pipe and coupled to the reference potential node. Each of the three transmission cables includes a first insulating layer covering the conductor, a metal layer covering the first insulating layer, and a second insulating layer covering the metal layer. The three transmission cables are twisted around a periphery of the return cable along a longitudinal direction of the return cable, and the metal layer is coupled to the reference potential node.