VACUUM CIRCUIT BREAKER Russian patent published in 2015 - IPC H01H33/664 

FIELD: electricity.

SUBSTANCE: vacuum circuit breaker comprises arc-quenching chamber with axial movable and fixed electrodes complete with ring contacts. The electrodes are fixed to the chamber body, at that the movable electrode is fixed by means of current lead and metal corrugated tube. Inside the arc-quenching chamber, at the contact level, a cylindrical shield is mounted. From outside from the fixed electrode side, at the level of gap with contacts, a permanent magnet is fixed by means of a dielectric ring to the chamber body. The above magnet is made as a ring magnetized radially thus forming between contacts a field radial cross to the axis.

EFFECT: increased intensity of magnet field between ring contacts, improvement of switching performance.

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