| 摘要 |
<p>The invention relates to a system comprising a cylinder (1) containing a piston (2), which is directly connected to the main axle of rotation (7) of a switch by means of a link rod (6), and a valve (8), which is mounted on the base (2') of the piston (2). When the piston (2) moves in a manner that corresponds to the open position of the switch, said valve (8) closes the passage between the chambers (3 and 4) of the cylinder (1). In this way, the gas in chamber 3 is compressed and projected through the nozzles (5) in order to extinguish the arc which is generated during the opening of the switch. Meanwhile, when the switch rotation axle (7) movement is reversed, corresponding to the retraction of the piston (2), the valve (8) and the passage between the chambers (3 and 4) open. In this way, the gas in chamber 4 moves into chamber 3 and, as a result, the energy required to perform said piston retraction movement (2) is reduced.</p> |
