LOAD STEPPING SWITCH, METHOD FOR OPERATING A LOAD STEPPING SWITCH AND ELECTRICAL INSTALLATION WITH LOAD STEPPING SWITCH

摘要

A load stepping switch (1) for uninterrupted changeover between winding taps (n n+1) on a control winding (20) comprises a changeover switch (2) that comprises a first second and third changeover contact (2.1 2.2 2.3) and can adopt a first position in which the first and third changeover contacts are connected a second position in which the second and third changeover contacts are connected and a bridge position in which the changeover contacts are connected; a first fixed contact (4) that can be connected to a first winding tap; a second fixed contact (5) that can be connected to a second winding tap; a first moving contact (6) that can optionally make contact with each of the fixed contacts; a second moving contact (7) that can optionally make contact with each of the fixed contacts; a main path (8) that connects the first moving contact to the first changeover contact; an auxiliary path (9) that connects the second moving contact to the second changeover contact via a current limiting element (10); a switching element (11) that is connected between the main path and the second changeover contact.