| 摘要 |
<p>Snap-action spring drive for load-reversing switches of multiple contact switches whose spring can be loaded by a drive. In conventional load-reversing switches, a gear moves a cam disk to and fro between two end positions, so that the contacts which close last during the movement in one direction are the first to open during the reverse movement and vice versa. This rigid sequence of contacts is unsuitable for thyristor load-reversing switches. The invention proposes that the driven element be connected to a coupling element which can rotate in one direction only, independently of the direction of rotation of the drive. This permits automatic contact sequence control and precludes switching errors, in a simple manner.</p> |
