Patent · US Active

On-load tap changer

US9251971B2 · kind B2 · utility

2Cited by

5References

3Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Wolfgang Albrecht · Wenzenbach, DE
Klaus Hoepfl · Maxhütte-Haidhof, DE
Silke Wrede · Zeitlarn, DE

Key dates

Filing date	Feb 6, 2012
Grant date	Feb 2, 2016
Priority date	—
Expiry date	Oct 1, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01H3/44
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An on-load tap changer for uninterrupted changeover between winding taps of a tapped transformer has a separate selector for power-free preselection of the winding tap to be switched to, a separate load changeover switch for the actual load changeover from the previous to the preselected new winding tap, a rotatable drive shaft, and a force accumulator with at least one force-accumulator spring that for each load changeover is initially stressed by the drive shaft and after triggering thereof abruptly actuates the load changeover switch. A gear operatively connected with the drive shaft can load the force accumulator. A first mechanical freewheel between the gear and the force accumulator temporarily decouples the force accumulator from rotation with the drive shaft in such a manner that the force accumulator can be stressed with a delay in time after the start of actuation of the drive shaft.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.