| 摘要 |
The invention relates to a restorable high-speed circuit closer capable of rapidly short-circuiting the conductors in a multi-phase network, for example for the purpose of eliminating a fault arc. The rapidity of the circuit closer is achieved by releasing, bymeans of an electrically controlled latch (28), the required operating energy in a prestressed torsion spring (14) to which radially extending short-circuiting contact arms (18) are attached. In the open contact position, the contact arms are located midway between the fixed contacts (21) which are connected to the phase conductors to be short-circuited. The fixed contacts (21) are provided with resilient contact elements forming wedge-shaped grooves (23) into which the short-circuiting contact arms (18) slide during a closing operation. Adjacent to both the fixed and the movable contacts (18), shields for electric field equalization are arraanged such that the insulation distances between the contacts in the open position may be reduced. For the same reason, the contact arrangement is placed in a cylindrical cavity (34) with a gaseous insulating medium. The high-speed circuit closer is restored by tensioning the torsion spring with, for example, a torque wrench or a motor drive (31). |
