SWITCH SYSTEM FOR A VARIABLE TRANSFORMER, IN PARTICULAR PRESELECTOR Russian patent published in 2018 - IPC H01H9/00 

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and relates to switching system (1), in particular a preselector, for variable transformer (4). Switching system includes first winding (2) and second winding (3) with first and second tap (3.3, 3.4), includes first connection terminal (2.1) that can be connected to first winding (2); second connection terminal (3.1) that can be connected to first tap (3.3); third connection terminal (3.2) that can be connected to second tap (3.4); first, second, third and fourth fixed contact (5.1, 5.2, 5.3, 5.4); vacuum interrupter (6); first moving contact (7) that can be contacted selectively with first or second fixed contact (5.1, 5.2); a second moving contact that can be contacted selectively with third or fourth fixed contact (5.3, 5.4); wherein second and fourth fixed contact (5.2, 5.4) are connected to second connection terminal (3.1); first and third fixed contact (5.1, 5.3) are connected to third connection terminal (3.2); first moving contact (7) is connected to first connection terminal (2.1) via vacuum interrupter (6); second moving contact (8) is connected to first connection terminal (2.1).

EFFECT: technical result consists in obtaining a simple structure with a small structural space.

10 cl, 16 dwg