| 摘要 |
<p>A vacuum-type contactor assembly is provided having an operating linkage such that a fault, or heavy overload currents, will cause a maintenance of the contact-closed position, and a pair of springs are provided in the operating linkage, one of which is purely an atmospheric pressure compensating, or "kickoff", spring, whereas the other is a heavy contact pressure spring compressed following contact closure, and serving to provide both a hammer action at contact separation to break any welds occurring at the contact structure, and an accelerating force during contact opening. Preferably, an electromagnetic actuating mechanism is utilized to effect the short travel and high contact forces typically required by vacuum-type switches.</p> |
