VACUUM INTERRUPTER FOR VACUUM CIRCUIT BREAKER Russian patent published in 2014 - IPC H01H33/664 

FIELD: electricity.

SUBSTANCE: attracting element is provided, made from ferromagnetic material, to form a space between a fixed electrode and a movable electrode to attract a radial magnetic field generated in radial direction between a fixed electrode and a movable electrode by means of an attracting element. On the outer circumferential surface of the isolated container there is a support groove formed in a stepwise manner to support an attracting element inserted in it, in the axial direction, which is a direction for movement of a movable electrode. Height of the attracting element in the axial direction is not less than the maximum distance between the fixed electrode and the mobile electrode. At the same time a component of the radial magnetic field in a common horizontal direction between a fixed electrode and a mobile electrode may be increased.

EFFECT: increased moving force of an arc by minimisation of an arc in a not strictly horizontal direction.