Current limiting fuse with resinous arc-quenching filler

Details Current limiting fuse with resinous arc-quenching filler Current limiting fuse with resinous arc-quenching filler

1977-04-18

1978-08-22

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337279, 337280, H01H 8518

Patent

active

041092287

ABSTRACT:
A current limiting fuse construction including a fuse element extending between electroconductive terminals carries a body of arc-quenching filler material within a hollow casing of electric insulating material. The filler material includes loose granular insulating material, such as sand, and larger particles of material uniformly distributed throughout the sand as a resin vaporizable in response to the heat of an arc current. According to a second embodiment a stratified filler comprises uniformly spaced layers alternately occurring between sand and a sand/resin mixture to increase arc voltage.

REFERENCES:
patent: 3275771 (1966-09-01), Salzer
patent: 3291942 (1966-12-01), Kozacka
patent: 4032879 (1977-06-01), Monagan

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