Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1986-03-14
1987-03-31
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337159, 337295, H01H 8504
Patent
active
046546200
ABSTRACT:
An asymmetrical fuse link employs a planar conductive member with the top and bottom surfaces manifested by having a series of alternating partial apertures with the alternating apertures in the top surface being of a first larger area followed by a second smaller area followed by a next larger area and so on. The bottom surface of the link also having a plurality of alternating partial apertures with the smaller diameter aperture of the bottom surface aligned with a larger diameter aperture in the top surface and so on. Thus the top and bottom surfaces each have partial apertures, with one of which is of a larger area and the next of a smaller area and arranged along a common axis and separated by a central aperture. Based on the above construction of the link, an arc generated during current interruption of the fuse is caused to zig zag along opposite edges of the planar member from a first to a second end. The configuration allows one to employ less material in implementing a fuse link than employed with prior art configurations, and makes for an excellent very fast acting current limiting fuse without a high peak recovery voltage.
Rooney Francis J.
Rooney William J.
Broome Harold
Commercial Enclosed Fuse Co. of New Jersey
Plevy Arthur L.
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