Patent ID: 8748758
Filing Date: 2014-06-10
Classification: H01H

Abstract:
1. In combination with an on-load tap changer having a rotatable drive shaft: a driven shaft; a driven element movable by the driven shaft between end positions flanking an intermediate toggle position and rotationally couplable to the drive shaft; a first spring braced against the driven element and loaded on movement of the driven shaft from one of the end positions toward the intermediate toggle position, whereby after movement past the toggle position the driven element is forced by the first spring into the other of the end positions and the driven element rotates the drive shaft; a cam fixed on the drive shaft and having a noncircular edge; a link carrying a roller; and a second spring braced against the link and urging the roller radially against the edge, whereby forces applied by the second spring and the shape of the cam edge affect the rotation rate of the drive shaft on travel of the driven element away from the intermediate toggle position.