VACUUM SWITCH AND METHOD OF SWITCHING Russian patent published in 2011 - IPC H01H33/666 

FIELD: electricity.

SUBSTANCE: drive system additionally comprises main spring, which moves shift linkage from open position into switching position, drive for pre-loading of main spring, locking mechanism to lock main spring in pre-loaded condition and hinge latch configured for movement in longitudinal direction, at least, in position, in which its rotation is locked, so that shift linkage can be released by latch when moving from open position into switching position and locked in switching position. Additionally, shift linkage can be released in latch position, in which it is unlocked for rotation by means of latch rotation for movement from switching position into open position.

EFFECT: improvement of vacuum switch reliability and switching safety even at low temperatures or low battery voltage, and guarantee of safe blocking in switching position.

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