SWITCHING DEVICE AND TOGGLE MECHANISM LEVERS FOR AIR CIRCUIT BREAKER Russian patent published in 2009 - IPC H01H31/30 

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering. According to the invention, device contains movable and fixed contacts by the number of phases, driving rotatable shaft, driving shaft lever, which is in coaxial position to the driving shaft with its one end being coupled with the movable contact, closing spring, drive lever connected with closing spring and toggle mechanism levers. The toggle mechanism levers consist of the first lever which is rotatable, the second lever with its one end being connected with the first lever and rotated by output power generated due to resiliency of closing spring. The second lever has a pair of extended parts linked with the first lever so that touching of the first lever can be avoided due to retaining it between the above extended parts. The third lever is also available in the toggle mechanism. One end of the third lever is connected with the second lever and rotates together the second lever to set movable contact into closing position.

EFFECT: wide range of application and improved reliability.

3 cl, 4 dwg