Vacuum Interrupter Assembly For A Power Diverter Switch, Power Diverter Switch For A Transformer Load Tap Changer And Transformer Load Tap Changer

Abstract: A vacuum interrupter assembly (10) for a power diverter switch comprises a vacuum interrupter (11) and a driving mechanism (12) which is coupled to the vacuum interrupter (11) and which is configured to drive opening and closing of electrical contacts of the vacuum interrupter (11). The driving mechanism (12) includes a driving rod (19) and a guiding tube (18) enclosing the driving rod (19) such that the driving rod (19) is axially movable inside the guiding tube (18) along a longitudinal axis (L) of the vacuum interrupter assembly (10). A damping unit (20) is coupled with the driving mechanism (12) and comprises a first chamber (21), a second chamber (22) and a piston (29) arranged there between with respect to the longitudinal axis (L), wherein the chambers (21, 22) are coupled with each other hydraulically and limited by the guiding tube (18) and the piston (29), and wherein the piston (29) is coupled with the driving rod (19) axially movable along the longitudinal axis (L) such that in interaction with a fluid the damping unit (20) provides hydraulic damping both when opening and when closing the electrical contacts of the vacuum interrupter (11) due to movement of the driving rod (19) and the piston (29).

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