| 摘要 |
<p>The invention relates to a transmission system for tripping a fuse holder, comprising two parallel shafts (1, 2). According to the invention, three retaining hooks (7) are mounted to shaft 2 and are disposed at the same positions as the three current-limiting fuses. In addition, shaft 1 is provided with a tilting part (12) which can be retained by one of the aforementioned hooks (7) such that, when one of the fuses fails, the corresponding striker pushes against the retaining hook (7) which is disposed thereon, in order to rotate the shaft (2) and, consequently, the other two hooks (7). As a result, the tilting part (12) is released and, owing to the action of the spring (18), pulls a cord (5) which is suitably connected to the switch-opening mechanisms. Moreover, said system comprises a pair of triggers (13) which are mounted to shaft 2. The door which is used to close the fuse holder housing pushes against said triggers in order to lock the tilting part (12) in the hook (7), against the action of the spring (18), thereby producing the automatic loading of the system. Furthermore, a momentum wheel (9), which is mounted to shaft 2, can freely rotate on said shaft and is equipped with a crown comprising a toothed section (11) which is engaged therein. In this way, when the fuseholder is tripped, the rotation of the tilting part (12) is prevented or braked by the mass of the momentum wheel (9), said wheel serving to delay the opening of the switch.</p> |
