An on-load tap changer for uninterrupted switching between different winding taps of a tapped transformer has a plurality of fixed selector contacts electrically connected with the individual winding taps, arranged in a line, and actuatable by two longitudinally displaceable movable selector contacts. Two vacuum interrupters serve for the uninterrupted switching of each phase. A motor drive actuates the on-load tap changer. The entire load changeover switch is arranged by a transmission module on the underside of a transformer cover.

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.

A switch assembly includes a switch, and a servo drive system for the switch. The servo drive system includes a motor configured to drive the switch; a power section configured to supply power to the motor; and a controller embodied as a programmable safety controller configured to actuate the power section depending on a desired value.

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.

A method for carrying out a switchover of a switch from a current switching position to a target switching position by means of a drive system. The method includes receiving, by the drive system, a switching signal from a control device, determining, via a feedback signal of a feedback system, at least one value for a first position of a drive shaft of the drive system, determining, by the control device, a value for a second position of the drive shaft on the basis of the target switching position, to be moved to, of the switch, and ascertaining, by the control device, a difference between the value for the first position and the value for the second position of the drive shaft. The control device, depending on the feedback signal, acts on a motor until the value for the second position of the drive shaft is reached.

A spring unit includes a mechanical spring means having a spring direction and being located between a first spring support and a second spring support, which first and second spring supports are movable in relation to each other in the spring direction. The spring unit further includes a first actuation member facing the rear side of the first spring support and a second actuation member facing the rear side of the second spring support, which first and second actuating members are movable relative to each other and relative to the first and second spring supports in the spring direction.

An on-load tap changer includes: a fine selector, including: fixed contacts having a commutation contact, connectable with a main winding, and tap contacts, connectable with an associated tap of regulating windings; first and second arms that selectably contact the fixed contacts; a preselector, switchable between first and second settings, connectable with the regulating and main windings, and having: first, second, and third preselector fixed contacts, connectable in the first setting with the first preselector fixed contact and in the second setting with the second preselector fixed contact; and a load changeover switch, switchable between first and second changeover settings, and including: a first terminal connected with the first arm, a second terminal connected with the second arm, and a diverter line connected in the first changeover setting with the first terminal and in the second changeover setting with the second terminal.

A system for controlling a vacuum interrupter for a power diverter switch comprises a main driving shaft which is configured to drive the control cam. The system further comprises the vacuum interrupter which is configured to separate electrical contacts in a vacuum by use of a contact rod, and a transmission unit which is configured to transmit the force generated by the main driving shaft to the contact rod. The transmission unit comprises a lever mechanism with a plurality of rollable guiding elements and a rotatable fork-shaped lever, the lever mechanism is coupled to both the control cam and the contact rod of the vacuum interrupter such that a rotation of the control cam generated by the main driving shaft causes a movement of the contact rod due to a guided rotation of the fork-shaped lever by means of rolling of the guiding elements.

An on-load tap changer module for an on-load tap changer, including a carrier, a diverter switch with a vacuum interrupter and a bridge switch, a selector, a change-over selector, and a drive module, wherein the diverter switch, the selector, and the change-over selector are arranged on the carrier and are activated centrally by the drive module.

The present disclosure provides a degassing membrane tube module and an online gas-in-oil monitoring apparatus for a vacuum on-load tap changer (OLTC). The online gas-in-oil monitoring apparatus includes an online monitoring housing, an oil inlet tube, a gas monitoring device, an oil tank, and an oil diffusing screen, where one end of the oil inlet tube extends through an inner wall at one side of the online monitoring housing; the gas monitoring device is located on a top inner wall of the online monitoring housing; and a front end of the oil inlet tube is provided with the degassing membrane tube module for online preliminary degassing on insulating oil. With the degassing membrane tube module, the online gas-in-oil monitoring apparatus can increase removal rates for gases in the insulating oil within a short time, and can perform degassing on various gases in the insulating oil.