Hitachi Energy Ltd

Hitachi Energy Switzerland Ag

Angel Mihaylov

Georgi Manev

Borislav Vasilev

Todor Kokev

Veselin Nikolov

Tommy Larsson

Tommy L Larsson

Todor Panteleev Kokev

The present disclosure relates to a driving system for an on-load tap changer, comprising a vacuum interrupter driving mechanism configured to drive a vacuum interrupter of the on-load tap changer, an energy accumulation mechanism mechanically coupled with the vacuum interrupter driving mechanism, and a flywheel mechanism mechanically coupled with the vacuum interrupter driving mechanism. The flywheel mechanism comprises a flywheel. The energy accumulation mechanism is mechanically coupled with a primary driving unit and is configured to accumulate and release energy for combined motion of the vacuum interrupter driving mechanism and the flywheel mechanism. The vacuum interrupter driving mechanism and the flywheel mechanism are arranged along a main driving axis and the flywheel is concentrically arranged around the main driving axis.

Driving system for an on-load tap changer

Switching system for an on-load tap changer, on-load tap changer and method for switching a tap connection of an on-load tap changer

An on-load tap changer includes a static unit including fixed contacts for connection to taps at a transformer winding, a dynamic unit including at least one movable contact for selectively contacting one of the fixed contacts during operation of the transformer, and includes a rotational positioning device for adjusting the rotational position of the dynamic unit relative to the static unit during at least one of assembly or disassembly of the tap changer.

On-load tap changer with positioning device and method for assembling an on-load tap changer

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.

A contact unit for an on-load tap changer includes a connector body and a contact holder coupled to each other, wherein the connector body is configured to connect the contact holder to a contact of the on-load tap changer. The contact unit further includes a contact element coupled to the contact holder and configured to make electrical contact to a contact element of a contact device for the on-load tap changer. The contact unit further includes drive and guiding features coupled to the contact holder such that the contact element is movable driven and linearly guided in a direction away from the connector body.

Contact unit and contact system for an on-load tap changer and on-load tap changer

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;

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Plovdiv, Bulgaria

Angel Mihaylov