Fuse structure for electrical protection, has opening formed in non-conducting tube to permit heated internal air to flow out of tube when welding second cap, which covers opening when fuse finished

摘要

The structure has a non-conducting small tube (1) with both ends joined to respective metal caps (3) and an internal metal filament and/or melting wire (4). The improvement is in the form of an opening formed in the non-conducting tube to permit heated internal air to flow out of the tube when welding the second cap. The opening is covered by the metal cap when the fuse is finished.