A wind turbine is provided having a foundation, a tower with a tower wall, at least one component to be cooled within the tower wall, a first cooling unit within the tower wall for cooling the components to be cooled, a second cooling unit, which is provided at least partially outside the tower wall, and a medium-voltage switchgear assembly within the tower wall. The wind turbine further has at least one fault arc duct between the medium-voltage switchgear assembly and the second cooling unit. At least one cooling duct or a cooling line between the first and second cooling unit is also provided. The second cooling unit has a heat exchanger which is coupled to the cooling duct or the cooling line, and a pressure-release unit which serves to guide a pressure wave formed inside the medium-voltage switchgear assembly and transmitted via the fault arc duct to the outside.

Provided is a busbar arrangement for a wind turbine generator, the wind turbine generator including a stator and a rotor arranged to rotate around an axis, the arrangement comprising a plurality of busbars for transporting electric power away from the generator, wherein each busbar is arranged at an individual radial distance from the axis and at an individual axial position along the axis. Furthermore, a wind turbine and a method of manufacturing a busbar arrangement is provided.

A cable holder, in particular for a cable of a wind turbine, to a cable harness, to a tower, to a wind turbine and also to a method for fastening a cable. In particular, a cable holder, in particular for a cable of a wind turbine, preferably for a medium-voltage cable connected to a medium-voltage transformer of a wind turbine, comprising a cable mount with a funnel-like cavity and also comprising an elastic insert, which is arranged within the funnel-like cavity, wherein the cable mount and the elastic insert are arranged and designed such that the cable can extend through the funnel-like cavity and the elastic insert can be clamped in between the cable mount and the cable.

A heat dissipation retaining structure for a heat production device, an installation method thereof, and a wind turbine generator set. The heat dissipation retaining structure includes a retaining structure body for defining a middle space, and a thermal radiation absorption coating, a heat insulating material, or an infrared low-emissivity and high-reflectivity material is at least partially applied to an inner wall of the retaining structure body. The air temperature of the environment in the retaining structure is actively decreased by the foregoing structure under the conditions that noise is avoided, environmental friendliness is achieved, external power is omitted, and energy consumption is zero, thereby decreasing the temperature of the heat production device, and ensuring that the heat production device works at the allowable normal temperature for a long time.

An enclosure and a dynamic heat dissipation method for a heat source inside the enclosure and a dynamic heat dissipation system are provided. The dynamic heat dissipation method includes: acquiring a relatively low temperature area of the enclosure; and driving the heat source to move to the relatively low temperature area. A heat source, which is conventionally at a relatively fixed position, is artificially and actively transformed into a mobile heat source, so as to allow the heat source to be self-adapted to the temperature field; a relatively low temperature area inside the enclosure is searched, taking advantage of the characteristics of temperature differences, the position of the heat source is adjusted and the heat dissipation layout is adjusted, thereby providing the heat source with an optimal heat transfer direction from inside to outside and an enclosure environment where the heat is dissipated at a maximum rate.

A pitch tube includes a first tube part and a second tube part. The first tube part and the second tube part are detachably connected to each other.

An assembly for installing a subsea cable, the assembly comprising a submersible apparatus and a submersible cable holder comprising the subsea cable, the subsea cable being connectable to the submersible apparatus through the connector for transmission of electric power and/or data to the submersible apparatus; wherein the assembly is configured to install the subsea cable while the submersible apparatus is electrically powered through said subsea cable. And a method for installing a subsea cable with a submersible apparatus, the method comprising: supplying electric power and/or transmitting data through the subsea cable to the submersible apparatus; and laying the subsea cable in a sea with the submersible apparatus.

Provided is a wind turbine including a generator enclosed in a generator housing, the generator housing including a rotating housing and a stationary housing, whereby the rotating housing is separated from the stationary housing by a first gap; a canopy mounted on a tower and including an electrical connection to a down conductor of the tower, wherein the canopy is separated from the generator housing by a second gap; a lightning current path provided by a plurality of brush assemblies mounted on the stationary housing, wherein a brush assembly includes a brush holder mounted on the stationary housing such that a carbon brush extends across the first gap to make electrical contact with the rotating housing; and an electrical connector extending across the second gap to electrically connect the brush holder to the canopy. Also provided is a method of providing a lightning current path for such a wind turbine.

A planetary stage includes a planetary carrier, at least one pitch tube, and at least one fixing element. The pitch tube is arranged coaxially to a rotation axis of the planetary stage. The pitch tube extends through a wall of the planetary carrier. The fixing element is fixed in the wall. The pitch tube has a groove. The fixing element engages in at least one part of the groove, wherein the at least one part of the groove extends orthogonally to the rotation axis. A plate is fixed in the wall, and the fixing element engages in a clearance between the wall and the plate and is fixed positively between the wall and the plate.

A slip ring assembly including a plurality conducting disks spaced-apart and stacked mounted along a common rotation axis, each being electrically connectable and fixedly securable to a generator mounted in a rotatable nacelle of a wind turbine so that a rotation of the rotatable nacelle triggers a rotation of the conducting discs; and a plurality of slip ring devices, each being electrically connectable and mechanically securable to a fixed electrical distribution conductor mounted to a fixed pole so as to have a fixed position relative to the fixed pole, and each of the plurality of the slip ring devices having upper and conducting fingers arranged so as to rotatably receive a respective conducting disk therebetween and to provide an electrical connection between the conducting disks and the slip ring device during rotation of the nacelle.