| 摘要 |
<p>This vacuum-type circuit interrupter in a high current interrupter rated for interrupting currents of 35,000 amperes r.m.s. or higher. Despite this high current interrupting requirement, each of its disc-shaped contacts can be made from an exceptionally small and thin blank because these contacts are of beryllium and each has a flat surface, without the usual central recess, extending from its center to a perimeter located radially between the outer periphery of the contact and the outer periphery of the inner and of the associated contact rod. On this flat surface of beryllium, contact-engagement occurs and arcs are initiated during interruption. Each contact rod is joined to its associated beryllium contact by means of brazed joint, a portion of which is accommodated in a very shallow recess on the back surface of the contact.</p> |
