Abstract: A vacuum interrupter arrangement may be used in a tap changer. The vacuum interrupter arrangement has a vacuum interrupter; a metal shield configured to shield against external magnetic fields, the metal shield having a hollow cylindrical design and being arranged around at least a part of a cylindrical outer surface of the vacuum interrupter; and a holder, which is arranged on the outside of the metal shield and the vacuum interrupter, and which surrounds the metal shield and the vacuum interrupter at least partially coaxially. The holder has a plurality of holding elements which hold the metal shield in position relative to the vacuum interrupter.

Abstract: A diverter switch is for an on-load tap-changer. The diverter switch includes: at least one vacuum interrupter; an actuating element, which is mechanically connected at a first end of the vacuum interrupter and has a roller at a second end; and an actuating body having a base body and having at least one cam. The vacuum interrupter is configured to be actuated via the actuating element as a result of the roller moving over the actuating body. At least one part of the cam has a higher strength than the base body.

Abstract: A diverter switch is for an on-load tap-changer. The diverter switch includes: at least one vacuum interrupter; an actuating element, which is mechanically connected at a first end of the vacuum interrupter and has a roller at a second end; and an actuating body having a base body and having at least one cam. The vacuum interrupter is configured to be actuated via the actuating element as a result of the roller moving over the actuating body. At least one part of the cam has a higher strength than the base body.

Abstract: A switching element for a tap changer, the switching element having a vacuum interrupter that includes a movable contact, a plunger connected with the movable contact, and a housing, in the interior of which, the movable contact is arranged. The switching element also has an actuator configured to actuate the plunger and thereby actuate the movable contact; and a guide. The guide is arranged outside of the housing and is attached to the actuator such that, when actuation of the movable contact takes place, the guide is configured to move therewith. The guide surrounds the housing at least in part, and at least a sub-region of the guide bears against the housing such that, when the movable contact is actuated, the sub-region is moved along the housing.

Abstract: A switching element for a tap changer, the switching element having a vacuum interrupter that includes a movable contact, a plunger connected with the movable contact, and a housing, in the interior of which, the movable contact is arranged. The switching element also has an actuator configured to actuate the plunger and thereby actuate the movable contact; and a guide. The guide is arranged outside of the housing and is attached to the actuator such that, when actuation of the movable contact takes place, the guide is configured to move therewith. The guide surrounds the housing at least in part, and at least a sub-region of the guide bears against the housing such that, when the movable contact is actuated, the sub-region is moved along the housing.

Abstract: An energy accumulator (15) for or in an on-load tap changer (10) comprises a motor (11) with an output shaft (12) and a load diverter switch (13) with an input shaft (14), comprising an elastic storage element (17); a transmission coupled to the storage element (17) and having an input hub (201) that can be rotationally fixed to the output shaft (12); an output hub (231) that can be rotationally fixed to the input shaft (14); and a variable transmission (20, 21) interposed between the input hub (201) and the storage element (17).

Abstract: An on-load tap changer has a load changeover switch insert having a switching tube rotatable about an axis, at least one switching module associated with the switching insert and having at least one switching segment fastened to the switching tube, an oil tank, and a resistor subassembly having a plurality of separate and identical resistors. An actuating arrangement associated with the switching module at an inner wall of the oil tank has a plurality of identical actuators associated with the switching module at the inner wall of the oil tank. The on-load tap changer is a load selector or a load changeover switch depending on the arrangement of the at least one identical switching segment, the resistor subassembly, and the mounting of the plurality of identical actuators at the inner wall of the oil tank.

Abstract: An on-load tap changer has a switching tube, an oil suction pipe arranged centrally and coaxially along an axis inside the switching tube, and a kerosene drain screw so mounted in a base of the on-load tap changer that it is coaxial with an axis of the oil suction pipe, with the axis of the switching tube, and with an axis of the on-load tap changer. A bearing ring is so acted on by a resilient element at one side and radially with respect to the axis of the on-load tap changer that the switching tube and the oil suction pipe both mechanically positively cooperate with the bearing ring and are centered about the axis of the on-load tap changer.

Abstract: An actuator (10) for actuating a vacuum switch tube (11) comprising a fixed contact (12) and a movable contact (13), comprises a bearing plate (14) that can be fastened to the fixed contact (12); a main spring (15) having a first end (151) with which it can engage the movable contact, and a second end (152); a return spring (16) having a first end (161) with which it engages at the bearing plate, and a second end (162); an actuating lever (17) having a first engagement area (171) at which the main spring (15) engages with its second end (152), and having a second engagement area (172) at which the return spring (16) engages with its second end (162); wherein the actuating lever (17) is swivelably mounted on the bearing plate (14) such that the actuating lever (17) can assume a first end position in which the main spring (15) is at least partially relaxed and the return spring (16) is tensioned and in which, in particular, the movable contact (13) is disconnected from the fixed contact (14), and a second

Abstract: Arrangement of vacuum switching tubes (3, 3a, 3b) in a load transfer switch (1), wherein in each case one cam controller (5) comprising a control cam (7) and a lever bearing (10) for operating a moving contact (13) is associated with in each case one of the vacuum switching tubes (3, 3a, 3b), wherein at least one camshaft (15a, 15b) is arranged axially parallel to a drive shaft (11) and can be driven by means of said drive shaft, and wherein each axis (A) of the moving contact (13) of each vacuum switching tube (3, 3a, 3b) is arranged perpendicular to an axis (E) of the respective camshaft (15a, 15b).

Abstract: What is disclosed is: an on-load tap changer (1). The on-load tap changer (1) comprises a diverter switch insert (14) and a vacuum interrupter (15), which is rotatable about an axis (A) and to which at least one switching module (24) is assigned. The switching module (24) comprises at least one switching segment (25) fastened on the vacuum interrupter (15) and an associated resistor arrangement (27). An actuating arrangement (41) is assigned to the switching module (24) on an inner wall (20) of an oil tank (18). In accordance with the invention, the resistor arrangement (27) has a plurality of resistor elements (28). In addition, the actuating arrangement (41) comprises a plurality of physically identical actuating elements (50), which are assigned to the switching module (24) on the inner wall (20) of the oil tank (18).

Abstract: The invention relates to an on-load tap changer (1), comprising a load transfer switch insert (14) and an oil suction pipe (60), and to a method for installing a load transfer switch insert (14) by means of the switching tube (15) and the oil suction pipe (60). The oil suction pipe (60) is arranged centrally, and coaxially along an axis (A) of the on-load tap changer (1), within the switching tube (15). The on-load tap changer (1) has a kerosene drain screw (70), which is attached in a bottom (21) of the on-load tap changer (1) in such a way that the kerosene drain screw is arranged coaxial to the axis (C) of the oil suction pipe (60), to the axis (B) of the switching tube (15), and to the axis (A) of the on-load tap changer (1).

Abstract: A tap changer with vacuum-switching tubes for controlling a transformer having taps has a selector for power-free selection of a one of the taps to be switched and a load-changeover switch for actual switching over from the connected tap to a new, pre-selected one of the taps. A first cam disk is fixed against rotation on a rotatable switch shaft, and a rocker lever arrangement has a first roller for actuating the vacuum-switching tubes. A second cam disk is also rotationally fixed on the switch shaft, and there are two further arms of U-shaped construction on the rocker lever arrangement. A lever has a free end provided with a second roller that co-operates with the second cam disk. This lever is between the further arms and mounted to be rotatable about an axis. A compression spring is provided between the lever and the further arms.

Abstract: An on-load tap changer for uninterrupted changeover between winding taps of a tapped transformer has a separate selector for power-free preselection of the winding tap to be switched to, a separate load changeover switch for the actual load changeover from the previous to the preselected new winding tap, a rotatable drive shaft, and a force accumulator with at least one force-accumulator spring that for each load changeover is initially stressed by the drive shaft and after triggering thereof abruptly actuates the load changeover switch. A gear operatively connected with the drive shaft can load the force accumulator. A first mechanical freewheel between the gear and the force accumulator temporarily decouples the force accumulator from rotation with the drive shaft in such a manner that the force accumulator can be stressed with a delay in time after the start of actuation of the drive shaft.

Abstract: A tap changer for uninterrupted switching over between winding taps of a tapped transformer has two load branches each for a respective phase to be switched. Each load branch has a vacuum switching contact acting as main contact and parallel thereto at least one series connection of a switch-over resistance and a respective further vacuum switching contact. The two load branches are connected with a common load shunt or connectable by mechanical switching elements. Two respective vacuum switching contacts of each load branch are constructionally combined to form a single vacuum switching tube with two separate movable contacts actuatable independently of one another and a common fixed contact. The common fixed contact is connected with the common load shunt or connectable mechanical switching contacts.

Abstract: Arrangement of vacuum switching tubes (3, 3a, 3b) in a load transfer switch (1), wherein in each case one cam controller (5) comprising a control cam (7) and a lever bearing (10) for operating a moving contact (13) is associated with in each case one of the vacuum switching tubes (3, 3a, 3b), wherein at least one camshaft (15a, 15b) is arranged axially parallel to a drive shaft (11) and can be driven by means of said drive shaft, and wherein each axis (A) of the moving contact (13) of each vacuum switching tube (3, 3a, 3b) is arranged perpendicular to an axis (E) of the respective camshaft (15a, 15b).

Abstract: An on-load tap changer (1) having at least two vacuum interrupters (3) is disclosed. The on-loader tap changer comprises a selector (7) for selecting a respective winding tap (n, n+1) of a tapped transformer (9), a load changeover switch (5) for changing over from the connected winding tap (n) to the respectively preselected winding tap (n+1), a rotatable drive shaft (11) which is mechanically coupled to the selector (7), and a gear mechanism (15) for operating a moving contact (17) of a respective vacuum interrupter (3). In each case one spindle (19) which can move in a direction of the axis (A) and is coupled to the moving contact (17) can be operated by means of the gear mechanism (15). The invention also relates to a drive for a load changeover switch having at least two vacuum interrupters.

Abstract: The present invention relates to a load transfer switch for a tap changer, comprising permanent main contacts that switch powerlessly for each phase. The general inventive concept lies in connecting the fixed permanent main contacts of side A or B of the load transfer switch by means of a movable rail-shaped permanent main contact that establishes an electrical connection to the corresponding permanent main contacts of the load line only in the end positions of the movable rail-shaped permanent main contact and in addition only provides for a single deflection for actuation, which connects in a purely compressive manner the plurality of contact fins of the corresponding fixed permanent main contact, which contact fins are connected in a resilient, articulated manner.

Abstract: The invention relates to a mechanical switch contact (10) for releasing, disconnecting, or switching over, in particular for an on-load tap changer of a step transformer, comprising at least two contact fingers or contact finger blocks (12, 14), which can each be pivoted between two end positions and which are connected to each other in an electrically conductive manner and which are each operatively connected to a rotatable switching shaft (18) by means of multi-arm joints (16), said switching shaft having all-around guide slots (24) for actuating the multi-arm joints (16) and for thereby deflecting the contact fingers or contact finger blocks (12, 14).

Abstract: The invention relates to a stepping switch with vacuum switching tubes (22) according to the preamble of the first claim. According to the invention, the general inventive concept consists in providing a second cam disc (3) which is rotationally fixed to the driveshaft (1) in addition to the first cam disc (2) which is rotationally fixed to the driveshaft (1) and which is known from the prior art for applying the force of the opening stroke of the contact system of the vacuum switching tubes (22). The second cam disc exerts a sufficiently high closing force onto the movable follower of the vacuum switching tubes (22) via a spring-lever system provided on the rocker arm arrangement (6) even in the event of a short-circuit stress and additionally allows a tolerance compensation of the contact system.