An on-load tap-changer of a tap-changing transformer has a switch. The switch has: a take-off contact; a primary fixed contact; and a contact unit. The contact unit has a moving contact, a first arcing contact and a second arcing contact. These contacts are pivotable about a pivot axis during a switchover process such that the contacts assume a first position, in which they make contact with the take-off contact and the primary fixed contact, and a second position, in which they are separated from the take-off contact and the primary fixed contact. The second arcing contact assumes the first position before the first arcing contact when switching over from the second position to the first position and leaves the first position after the first arcing contact when switching over from the first position to the second position.

A switching system for an on-load tap changer comprises: a Geneva mechanism, wherein the Geneva mechanism comprises: a holder, the holder being fixed relative to a housing; a rotatable ring with a recess, the rotatable ring being supported by the holder and being rotatable relative to the holder; a connector, the connector being rotatable together with the rotatable ring to electrically connect with a tap of the tap changer; and a rotatable driving wheel with a protrusion, the protrusion being coupleable with the recess to rotate the rotatable ring, the driving wheel being arranged inside the rotatable ring.

A switching system for an on-load tap changer includes: a Geneva mechanism, wherein the Geneva mechanism includes: a rotatable ring with a recess, a connector, the connector being rotatable together with the rotatable ring to electrically connect with a tap of the tap changer, and a rotatable driving wheel, wherein the driving wheel comprises a holding disk and a lever, the holding disk being rotatable around a longitudinal axis and wherein the lever is slidable radial to the longitudinal axis relative to the holding disk, and wherein the lever is coupleable with the recess to rotate the rotatable ring.

Disclosed are a passive triggered-power electronic tap-changer device and a contact device. The power electronic tap-changer device comprises: two taps, a main contact, two auxiliary contacts, two trigger contacts, an output terminal, two thyristors, and four voltage divider resistors, which can achieve the passive triggering of a power electronic switch by means of controlling the auxiliary contacts and the trigger contacts. Provided in the present invention is a contact device for the passive triggered-power electronic tap-changer, comprising: at least two stationary contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts, and a drive shaft, wherein the main contact, the thyristor trigger contacts, and the thyristor auxiliary contacts are fixed to the drive shaft, the contact device can switch the power electronic switch to different stationary contacts by means of controlling the rotation of the drive shaft, and maintains the switching time sequence of passive triggering.

A drive arrangement for a tap changer includes a first movable latch having a first and a second end a first rotatable wheel with a first actuating element, a second rotatable wheel with a first locking element, and a first spring connected between the first and second wheels. The first actuating element is provided on a first half of a first curved surface of the first wheel, the first locking element is provided on a first half of a second curved surface of the second wheel, a second actuating element is provided on a second half of the first curved surface aligned with a first end of a second latch and a second locking element of the second rotating wheel is provided on a second half of the second curved surface aligned with a second end of the second latch.

An on-load tap changer is for uninterrupted diverter switch operation. The on-load tap changer includes: a first module having a first module shaft; and a second module having a second module shaft. The first module shaft is configured to actuate the first module. The second module shaft is configured to actuate the second module. The first module shaft and the second module shaft are mechanically coupled to one another in such a way that the first module shaft is configured to drive the second module shaft and the second module is configured to be actuated with a time delay with respect to the first module.

An on-load tap changer uninterruptedly switches between winding taps of a tap-changing transformer. The on-load tap changer includes: at least one selector configured to preselect, in a powerless manner, a selected winding tap of the winding taps; at least one diverter switch configured to actually switch loads from a previous winding tap to a preselected winding tap of the winding taps; at least one toothed gearing comprising a first gearwheel and a second gearwheel, the first gearwheel being assigned to the selector, and the second gearwheel being assigned to the diverter switch; and a drive shaft, which is configured to be actuated by a motor drive. The first gearwheel and the second gearwheel are directly interconnected mechanically in such a way that the first gearwheel and the second gearwheel are simultaneously actuatable. The drive shaft is configured to drive either the first gearwheel or the second gearwheel.

A selector (1) for an on-load tap changer, comprising a tap selector (2) with at least one selector arm (21, 22); a change-over selector (4), characterized in that the change-over selector (4) is actuated via at least one of the selector arms (21, 22) of the tap selector (2).

An on-load tap-changer uninterruptedly operates a diverter switch between different winding taps of a tap-changing transformer. The on-load tap-changer has an on-load tap-changer plate; a selector; and a diverter switch. The selector and the diverter switch are mounted on the on-load tap-changer plate.

A vacuum interrupter module for a tap changer includes an insulation plate having a first main side and a second main side opposite of the first main side, a vacuum interrupter assembly, a bypass switch assembly, and a control cam. The vacuum interrupter assembly includes a vacuum interrupter and a driving mechanism coupled with the vacuum interrupter, the vacuum interrupter and the driving mechanism being arranged on the first main side of the insulation plate. The bypass switch assembly includes two bypass contacts, each one mechanically connected to a corresponding bypass lever, the two bypass contacts and the two corresponding bypass levers being arranged on the first main side of the insulation plate. The control cam is arranged on the first main side of the insulation plate and configured to actuate both the driving mechanism and, through the corresponding bypass levers, the two bypass contacts.