| 摘要 |
The miniature fuse capsule has a fuse wire (7) which melts in response to a given overload, contained within a press-tight chamber (9) which is filled with gas or evacuated. A metal surface lies adjacent the fuse wire within this chamber for receiving the switch arc (10) upon rupture of the fuse, with extinction of the secondary are (11,12) at one or both of the fuse wire contacts (3,4). Pref. the metal surface (14) is provided by a disc supported at a short distance above the fuse wire (7) in a parallel plane, or by the inside surface of a metal cap (22) with an outer plastics coating (23). The metal surface (14) is pref. made of Fe, Cu, Al, Ti, Tn, Zn, Mo, W, Ag, Ni or Ta, or an alloy of two or more of these metals.
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