Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1993-12-27
1995-10-31
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337170, 337181, 337159, 337293, 337274, H01H 7110, H01H 7108, H01H 8504, H01H 8538
Patent
active
054633664
ABSTRACT:
A current-limiting dropout fuseholder includes multiple current paths through the fuse body. A primary current path includes a high current fusible element. A secondary current path in parallel with the primary path includes a triggering conductor that extends outside the fuse body and is connected to a moveable support. The second current path further includes a first spark gap for severing the triggering conductor upon the occurrence of a fault and the shifting of the fault current from the primary current path to the second current path. A second spark gap formed between the primary and the second current paths ensures that the fault current flows across the first spark gap for a time sufficient to sever the triggering conductor, thereby ensuring that dropout will occur.
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Hassler Stephen P.
Johnson Stephen P.
Lapp John
Cooper Industries Inc.
Maag Gregory L.
Picard Leo P.
Ryan Stephen T.
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