An electromagnetic repulsion actuator for a circuit breaker is provided. The actuator can include a housing; a first fixed electrode having therein an operating space open at both sides; a pair of movable electrodes capable of reciprocally moving and being electrically connected to the first fixed electrode; second fixed electrodes selectively contacting the pair of movable electrodes to be electrically connected thereto, thereby transferring power supplied from a first side to a second side; and actuating coils selectively moving the movable electrodes in a direction of being separated from the second fixed electrodes by generating electromagnetic force from induced current. In the present invention as above, the structure of a circuit breaker is simplified and moving speeds of the movable electrodes are increased since the movable electrodes move by using induced current generated by a close coil and open coils to perform an open operation.

A vacuum valve includes: a vacuum vessel; a cylinder; a partition wall separating an inside of the vacuum vessel from an inside of the cylinder; a movable conductor penetrating the partition wall being movable in an axial direction; a fixed contact fixed inside the vacuum vessel; a moving contact integrated with the movable conductor and being capable of separating from the fixed contact and coming into contact with the fixed contact in association with movement of the movable conductor; a lid that covers an end of the cylinder, the end being on a side opposite to the partition wall; a connecting rod penetrating the lid and coupled to the movable conductor via an insulating rod as an insulator; and a holder that holds the connecting rod while preventing movement of the connecting rod toward the fixed contact in a state where the moving contact is separated from the fixed contact.

A vacuum interrupter for switching voltages, in particular high voltages, includes at least one envelope, at least one fixed contact, at least one movable contact, and control elements in particular having different lengths and/or widths disposed on the at least one vacuum interrupter. An assembly includes the vacuum interrupters electrically connected in series, in particular by control elements disposed on the at least two vacuum interrupters, and/or by control elements of one vacuum interrupter connected in series to control elements of another vacuum interrupter, in particular of all vacuum interrupters. A method for grading or controlling voltage distribution among vacuum interrupters uses control elements, in particular capacitors and/or resistors, disposed on the vacuum interrupters, in particular in a housing along with the vacuum interrupters and/or along with control elements of different vacuum interrupters that are connected in series.

A load stepping switch (1) for uninterrupted changeover between winding taps (n, n+1) on a control winding (20) comprisesa 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.

The invention relates to a power circuit breaker that is suitable for switching electrical voltages. The power circuit breaker according to the invention comprises two main electrodes, to each of which a respective pole of the voltage to be switched can be connected. During the switching process, at least one of said main electrodes follows a switching path. The power circuit breaker is characterized in that secondary electrodes are additionally provided, which protrude into the vicinity of the switching path and are designed and arranged in such a way that arcs can be produced (a) between the main electrodes and the secondary electrodes and (b) between the individual secondary electrodes during the switching process. The power circuit breaker according to the invention can be advantageously used in vehicles and in ultra-high-voltage AC and HVDC (high-voltage direct current) transmission systems and causes arcs to be extinguished as early as possible during the switching process.