Patent ID: 9373442
Filing Date: 2016-06-21
CPC Classification: G05F,H01F,H01H

Claim Text:
1. An on-load tap changer for uninterrupted switching between winding taps of a tapped transformer, the tap changer comprising: a selector for power-free preselection of the winding tap to be switched to; a load changeover switch for the actual load changeover from the previous winding tap to the preselected winding tap, the load changeover switch having: a first separately actuatable mechanical contact in the first main current branch between the first winding tap and the first vacuum switching tube and having a first movable contact member; a second separately actuatable mechanical contact in the second main current branch between the second winding tap and the second vacuum switching tube and having a second movable contact member; a third separately actuatable mechanical contact in the first auxiliary current branch between the first winding tap and the third vacuum switching tube and having a third movable contact member; a fourth separately actuatable mechanical contact in the second auxiliary current branch between the second winding tap and the fourth vacuum switching tube and having a fourth movable contact member, whereby the vacuum switching tubes in the main current branch and the vacuum switching tubes in the auxiliary current branch of the unconnected winding tap are electrically separable from the unconnected winding tap.