It is aimed to provide a communication cable which includes a solid sheath on an outer periphery of a signal cable having a plurality of insulated wires and in which transmission characteristics hardly decrease due to a pressure in extrusion-molding a sheath. A communication cable 1 is provided with a signal cable 10 including a plurality of insulated wires 11 each having a conductor 12 and an insulation coating 13 covering an outer periphery of the conductor 12, and a solid sheath 20 covering an outer periphery of the signal cable 10. A melt flow rate of a constituent material of the sheath 20 measured at 200° and with a load of 2.16 kg is 0.25 g/10 min. or more.

It is aimed to provide a communication cable which includes a solid sheath on an outer periphery of a signal cable having a plurality of insulated wires and in which transmission characteristics hardly decrease due to a pressure in extrusion-molding a sheath. A communication cable 1 is provided with a signal cable 10 including a plurality of insulated wires 11 each having a conductor 12 and an insulation coating 13 covering an outer periphery of the conductor 12, and a solid sheath 20 covering an outer periphery of the signal cable 10. A melt flow rate of a constituent material of the sheath 20 measured at 200° and with a load of 2.16 kg is 0.25 g/10 min. or more.

A composite cable is composed of plural electric power wires, a first twisted wire made by laying plural signal wires together, a second twisted wire disposed opposite the first twisted wire with the electric power wires between the first twisted wire and the second twisted wire, and a sheath formed over plural electric power wires, the first twisted wire, and the second twisted wire. The second twisted wire is made by laying plural electric wires including a grounding wire together. Each of the plural electric wires of the second twisted wire is composed of a conductor and an insulator formed over the conductor.

A composite cable is composed of plural electric power wires, a first twisted wire made by laying plural signal wires together, a second twisted wire disposed opposite the first twisted wire with the electric power wires between the first twisted wire and the second twisted wire, and a sheath formed over plural electric power wires, the first twisted wire, and the second twisted wire. The second twisted wire is made by laying plural electric wires including a grounding wire together. Each of the plural electric wires of the second twisted wire is composed of a conductor and an insulator formed over the conductor.

A composite cable is provided with a coaxial wire and an insulated wire. The coaxial wire includes a center conductor, a first insulation covering the center conductor, and plural outer conductors arranged on an outer periphery of the first insulation, and a jacket covering the plural outer conductors. The insulated wire includes a stranded conductor including plural strands twisted together, and a second insulation covering the stranded conductor. The center conductor of the coaxial wire is a single wire. A conductor diameter of the center conductor is not more than a wire diameter of each of the plural strands of the insulated wire.

A composite cable is provided with a coaxial wire and an insulated wire. The coaxial wire includes a center conductor, a first insulation covering the center conductor, and plural outer conductors arranged on an outer periphery of the first insulation, and a jacket covering the plural outer conductors. The insulated wire includes a stranded conductor including plural strands twisted together, and a second insulation covering the stranded conductor. The center conductor of the coaxial wire is a single wire. A conductor diameter of the center conductor is not more than a wire diameter of each of the plural strands of the insulated wire.

Described herein are quick-connect twisted pair cables, cable systems and methods of installing/connecting them. For example, a quick-connect twisted pair cable may include a plurality of pairs of insulated wires within an outer insulating cover; within the insulating cover each of the plurality of pairs of insulated wires are wrapped around each other within elongate tubular body regions, and unwrapped (e.g., parallel) in flattened regions between the elongate tubular body regions. A quick plug connector may be configured as a standard (e.g., RJ-45) connector type.

A method for controlling a wind farm, which is operated by means of a wind farm control unit and comprises a multiplicity of wind power installations having wind power installation controllers and being connected to one another via a common wind farm grid, which is connected to an electrical power supply grid of a grid operator by means of a wind farm transformer, comprising the following steps: reception of at least one fault bit at the wind farm control unit, in particular at least one fault bit of the grid operator, deactivation of all external setpoint value specifications at the wind farm control unit apart from those of the grid operator after reception of the fault bit, activation of a closed-loop fault case control implemented in the wind farm control unit after successful deactivation of all external setpoint value specifications apart from those of the grid operator.

An in-vehicle system is provided with a first in-vehicle unit having a first electric signal transfer part, a first substrate wiring, and a first connector; a second in-vehicle unit having a second electric signal transfer part, a second substrate wiring, a third substrate wiring, a second connector, and a third connector; a third in-vehicle unit having a third electric signal transfer part, a fourth substrate wiring, a fifth substrate wiring, and a fourth connector; a first insulated sheathed cable connecting the first connector and the second connector; and a second insulated sheathed cable connecting the third connector and the fourth connector. When the first insulated sheathed cable is connected, the first substrate wiring and the third substrate wiring become conductive. When the second insulated sheathed cable is connected, the second substrate wiring and the fifth substrate wiring become conductive, and the third substrate wiring and the fourth substrate become conductive.

An in-vehicle system is provided with a first in-vehicle unit having a first electric signal transfer part, a first substrate wiring, and a first connector; a second in-vehicle unit having a second electric signal transfer part, a second substrate wiring, a third substrate wiring, a second connector, and a third connector; a third in-vehicle unit having a third electric signal transfer part, a fourth substrate wiring, a fifth substrate wiring, and a fourth connector; a first insulated sheathed cable connecting the first connector and the second connector; and a second insulated sheathed cable connecting the third connector and the fourth connector. When the first insulated sheathed cable is connected, the first substrate wiring and the third substrate wiring become conductive. When the second insulated sheathed cable is connected, the second substrate wiring and the fifth substrate wiring become conductive, and the third substrate wiring and the fourth substrate become conductive.