ARC SUPPRESSING DEVICE RESPONDING TO DISCONNECTION OF LOW CURRENTS BY SWITCHING APPARATUSES Russian patent published in 2004 - IPC

FIELD: electrical engineering; arc suppression in response to disconnection of below-rated currents of switching apparatus.

SUBSTANCE: device has pneumatic cylinder with piston and rod, as well as nozzle facing arcing zone between fixed and movable contacts. Movable contact and piston rod are spaced apart in closed position for actuating rod by means of movable contact during off-operation. Travel of rod is greater than that of movable contact at rod location point. Slow-down of movable contact movement is eliminated due to absence of rigid coupling between device components and due to easy displacement of piston relative to movable contact.

EFFECT: improved conditions for speeding up piston movement, reduced surges in arc suppression.

1 cl, 3 dwg