Exothermically assisted arc limiting fuses

Details Exothermically assisted arc limiting fuses Exothermically assisted arc limiting fuses

1996-10-21

1998-08-11

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337296, H01H 8538

Patent

active

057932751

ABSTRACT:
There is described a fuse comprising a housing and a current carrying strip of metal comprising a fuselink enclosed in the housing, each end of which electrically extends through the housing as an electrical connection. There being at least one first section of the metal strip for severing upon predetermined fault conditions, and at least one second section of the metal strip, distanced from the first section, having the properties of a hinge for pivoting. There further being at least one exothermic source in the proximity of the first section that substantially upon severance of the metal strip at the first section is ignited, and causes at least one segment of the severed metal strip to be propelled about the second section comprising the hinge. There further being an arc chute in proximity to the path of the moving severed edge of the first section such that fault current limiting is obtained.

REFERENCES:
patent: 2175250 (1939-10-01), Burrows et al.
patent: 3639874 (1972-02-01), Deelman
patent: 4331947 (1982-05-01), Noerholm
patent: 5262750 (1993-11-01), Gurevich

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