Circuit-breaker system

Circuit-breaker system, comprising: - be a switch (123) having a fixed electrode (121) and a movable electrode (122) are arranged such that the movable electrode (122) with the fixed electrode (121) come into contact and separated therefrom can; - a movable conductor as an actuating rod (124) of the movable electrode (122) extends away; - an actuating mechanism (15) opens the switch (123) by moving the movable operating rod (124) by means of a drive, and includes; - a frame (101) holding the switch (123) and the movable operating rod (124) in its interior; and - a fine movement mechanism (130) is provided with a vibration suppressing portion (140) is formed from two or more annular elements (141-1, 141-2, 142-1), which in one (in the direction of a central axis is, are a) stacked state on inclined surfaces or curved surfaces, which are formed at corresponding positions with each other in contact, and (in a driving direction of the movable electrode 122) on a supporting guide (103) attached, on which also the fixed electrode (121) is attached and between a lower stop member (132) and an upper stop member (133) is disposed, wherein the upper stop member (133) on the frame is fixed (101), and a force, which in collision of the movable electrode (122) with the fixed electrode (121) during a circuit closing operation in the vibration suppressing portion (140) is generated as Compr essionskraft fields.