VACUUM CIRCUIT BREAKER WITH TERMINAL CLAMPS RIGIDLY FIXED TO BUSES AT BOTH SIDES Russian patent published in 2014 - IPC H01H33/662 

FIELD: electricity.

SUBSTANCE: vacuum circuit breaker contains a vacuum chamber (2) with a switch contact consisting of a fixed contact element that is in contact with a terminal clamp (11) of the fixed contact, as well as a movable contact element and a drive unit (7). A switching mechanism (4) is connected to a drive unit (7) and the movable contact element. Connective means in contact position connect electrically a terminal clamp (13) of the movable contact with the movable contact element. The connective means have a screw terminal (16, 17) consisting of an input screw terminal element (16) connected to an electroconductive section of the switching mechanism (4) and the matching screw terminal element (17) connected rigidly to the vacuum chamber (2) and electrically to the terminal clamp (13), which are located so that the input screw terminal element (16) in result of a driven motion is clamped with the electroconductive section by the matching screw terminal element (17).

EFFECT: manufacturing of a compact circuit breaker which at fast closing speed ensures a reliable pathway for current with high current-carrying capacity between terminals of the vacuum circuit breaker.

10 cl, 1 dwg