Abstract: A telescopic electric conductor includes an electrically conductive first tube having a longitudinal axis and an electrically conductive second tube movable relative to the first tube along the longitudinal axis while being at least partly received within the first tube. An electrically conductive flexible self-supporting element is arranged inside the first tube and is mechanically and electrically connected to the first tube and to the second tube. The flexible element is arranged to elastically deform along the longitudinal axis. The flexible element has a waveform shape with several cycles of the waveform includes a number of sections that are welded together, each section having a shape of a half cycle of the waveform.

Abstract: A telescopic electric conductor includes an electrically conductive first tube having a longitudinal axis and an electrically conductive second tube movable relative to the first tube along the longitudinal axis while being at least partly received within the first tube. An electrically conductive flexible self-supporting element is arranged inside the first tube and is mechanically and electrically connected to the first tube and to the second tube. The flexible element is arranged to elastically deform along the longitudinal axis. The flexible element has a waveform shape with several cycles of the waveform includes a number of sections that are welded together, each section having a shape of a half cycle of the waveform.

Abstract: A high voltage valve arrangement includes a high voltage valve unit; an external electric shield structure arranged at least partially around the high voltage modular valve unit and a grounding system. The grounding system includes a grounding system configured to be remotely extended from a retracted position to an extended position, whereby the extendable grounding device establishes electric connection with the external shield structure when it is extended from the retracted position.

Abstract: A remotely controllable grounding system including at least one movable rod element having at least one conductive and isolating sections and at least one conductor configured to be electrically connected to ground and the movable rod element. The grounding system including at least one pair of positive and negative grounding terminals arranged to be fixedly connected to electric equipment to be grounded. The grounding system includes a rod propulsion system arranged to be remotely controlled and configured to move the at least one movable rod element from an ungrounded position (U), in which the positive and negative grounding terminals are isolated from one another by the isolating section, into a grounded position (G), in which the positive and negative grounding terminals are galvanically connected with one another by the conductive section and in which grounded position the conductive section is connected to ground via the at least one conductor.

Abstract: A remotely controllable grounding system including at least one movable rod element having at least one conductive and isolating sections and at least one conductor configured to be electrically connected to ground and the movable rod element. The grounding system including at least one pair of positive and negative grounding terminals arranged to be fixedly connected to electric equipment to be grounded. The grounding system includes a rod propulsion system arranged to be remotely controlled and configured to move the at least one movable rod element from an ungrounded position (U), in which the positive and negative grounding terminals are isolated from one another by the isolating section, into a grounded position (G), in which the positive and negative grounding terminals are galvanically connected with one another by the conductive section and in which grounded position the conductive section is connected to ground via the at least one conductor.

Abstract: A high voltage valve arrangement includes a high voltage valve unit; an external electric shield structure arranged at least partially around the high voltage modular valve unit and a grounding system. The grounding system includes a grounding system configured to be remotely extended from a retracted position to an extended position, whereby the extendable grounding device establishes electric connection with the external shield structure when it is extended from the retracted position.

Abstract: A power semiconductor arrangement including a clamping device including a first clamping element and a second clamping element. A plurality of power semiconductor elements are stacked on each other between the first and second clamping elements of the clamping device. The first clamping element receives a clamping force in an axial direction of the stack of the power semiconductor elements. At least one spring element is arranged between the first clamping element and the power semiconductor elements. The at least one spring element presents at least one support surface with which the at least one spring element bears against at least one corresponding support surface of an adjacent element. The at least one spring element includes a helical spring.

Abstract: A tubular core (6) for a controllable inductor with a main winding (1) surrounding the core and a control winding (7) passing substantially axially through the core. The core (6) is capable of receiving a magnetic flux from the main winding (1) running substantially axially therethrough and having a plurality of core rings (8) stacked co-axially on top of each other and connected to a rigid unit. The core rings (8) are connected to each other forming a walled construction. The core (6) also has an inner envelope (18) with an outer cross-section that is substantially equal to the inner cross-section of the core ring walled construction. The walled construction has joints (16) between the core rings (8) in an axial direction which are overlapped by a part of the envelope (18).

Abstract: A controllable inductor including a tubular core, a main winding (1) surrounding the core, a control winding running substantially axially to the core and an element (3) surrounding the core and arranged to support the main winding wound outside thereof in radial layers. The element includes means arranged to provide channels (19) partly defined by the radially inner turn of the main winding. Said channels are communicating with spacings between said layers (2). A member is arranged to generate a flow of air in the channels and through the spacings of the layers for cooling the main winding.

Abstract: A controllable inductor including at least one tubular core (10), a main winding (5) surrounding the core and a control winding (11) running substantially axially through said core and returning substantially axially outside thereof between said core and said main winding. The control winding is divided into a plurality of separate part control windings (12). The cross section of the part control windings is formed in a way that at least some adjacent part control windings inside the core are separated by means of a spacing (20, 26), which is at least partly defined by substantially parallel surfaces (16, 17) of these part control windings.

Abstract: A power semiconductor valve device including an enclosure for semiconductor components and a hollow insulating body to supply power to the semiconductor components from a remote location, in which the hollow insulating body is formed from a non-ceramic material and includes concentrically mounted tubes spaced from each other to provide an annular gap between them.