An arrangement includes a transmission, a pitch tube, and a fixation device configured to affix the pitch tube in the transmission. The fixation device is electrically insulated from the pitch tube. The pitch tube can be axially movable relative to the fixation device. The pitch tube can be fixed in a shaft or a rotatably-mounted planet carrier of the transmission by the fixation device.

An arrangement including a transmission, a feedthrough tube, and a fixing means is disclosed. A fixing means is disclosed whereby the feedthrough tube is fixed in the transmission. The fixing means includes an electrical non-conductor. Arrangements are disclosed in which the feedthrough tube is fixed axially and immovably in the fixing means.

An annular seal member comprising a seal body comprising a locating portion locatable against a wall element of an offshore structure, an inner surface, an outer surface and a lip portion that defines an open mouth of the seal member for receiving an elongate element therethrough; wherein the seal body is locatable against the wall element such that when a static pressure acting on the outer surface of the seal body exceeds a static pressure acting on the inner surface of the seal body a net positive pressure is exerted on the outer surface which at least partly deforms inwardly to provide a portion of the seal body for sealing against an outer surface of the elongate element. An offshore structure.

A protection device for preventing damage to an elongate flexible member passing through an aperture including a body portion adapted to be inserted into the aperture in a first direction and having an internal passageway for allowing movement of an elongate flexible member therethrough, and at least one latching element pivotally mounted on the body portion. The protection device can be used for protecting an elongate flexible member passing through an aperture in a support pillar of an offshore turbine generator. A method of removing the protection device from an aperture is also disclosed.

A cable hang-off device for holding a cable for a wind turbine includes a main body, which includes a first flange, an opposed second flange and a through passage to allow insertion of a cable, at least one temporary clamp, which is located in the through passage and which is configured to temporarily hold the cable in place within the main body, a clamping plate, which is configured to clamp armour wires of the cable against the second flange to hold the cable in place within the main body, a sealing sleeve, which includes a cylindrical wall that defines a sealing passage for one or more conductors of the cable, and at least one solid sealing element, which is configured to be installed within the sealing passage in order to at least partially surround the one or more cable conductors to seal the sealing passage.

A new method for installing one or more electric cables (60) in a wind turbine tower section (100) is provided. The method comprises providing the wind turbine tower section (100) in a substantially horizontal orientation and installing a zip line (20) inside the wind turbine tower section (100), between a first end (120) and a second end (130) of the wind turbine tower section (100). The method further comprises coupling a second end of the electric cables (60) to the zip line (20) at a location near the first end of the wind turbine tower section (100), drawing the second end of the electric cables (60) through the wind turbine tower section (100) along the zip line (20), decoupling the second end of the electric cables (60) from the zip line (20), and removing the zip line (20) from the wind turbine tower section (100). The method further comprises anchoring a first end of the electric cables (60) to the wind turbine tower section (100), at a location adjacent the first end of the wind turbine tower section (100), and anchoring the second end of the electric cables (60) to the wind turbine tower section (100), at a location adjacent the second end of the wind turbine tower section (100).

Provided is an electric cable for a wind turbine, wherein the electric cable includes at least one cooling element) to cool the electric cable, wherein the cooling element protrudes from the surface of the electric cable.

A power cable arrangement, in particular marine power cable, for offshore wind farms, including at least one cable drum device with a cable drum. The power cable arrangement includes at least one power cable wound on the cable drum with at least one cable end configured to pre-installing at a cable connection of a wind energy device. The power cable is wound on the cable drum such that a first section of the power cable is wound inversely to a further section of the power cable.

A wind turbine includes a tower composed of a plurality of tower sections, and an upper section on top of the tower. The upper section has a nacelle and a rotor with rotor blades. The rotor is attached to the nacelle. The rotor blades are rotatable by wind around a horizontal rotor axis to drive a generator . The wind turbine includes a HV cable arrangement laid in the tower connecting a first HV component in the nacelle and a second HV component in a wind turbine tower bottom or foundation. The HV cable arrangement is divided into cable arrangement segments corresponding to the plurality of tower sections, where respective two of the cable arrangement segments are connected via a cable connection device such that the plurality of cable arrangement segments is connected in series to constitute the HV cable arrangement. The cable connection device includes a plate-based shielding.

Provided is a cable twist allowance system for a wind turbine system. The system includes a sun gear disposed within a tower of wind turbine, a pivot disk connected with the sun gear, a plurality of lever members, each including a plurality of cables and spaced a predetermined distance apart from each other, the plurality of level members being pivotably connected with a surface of the pivot disk and rotatable about the sun gear; and a plurality of compression members, each compression member corresponding to each lever member and adjusting a position of a respective lever member based on a radial force applied to the plurality of cables of the respective lever member.