High voltage, high rupture capacity fuse

Details High voltage, high rupture capacity fuse High voltage, high rupture capacity fuse

1985-03-18

1986-10-14

Broome, Harold

Electricity: electrothermally or thermally actuated switches

With separate distinct diverse art-type switching device

Bimetallic device with other

337 4, 337148, 337244, H01H 3700, H01H 8500, H01H 7120

Patent

active

046175440

ABSTRACT:
An HRC-fuse as an insulating body surrounding a main fusible conductor and an auxiliary fusible conductor connected to a spring biased impact pin. A conductive cap serving as a terminal for the fusible conductors is arranged on the insulating body and is provided with an outlet opening opposite the impact pin. A tripping hollow pin or sleeve coaxially surrounds at least a part of the impact pin and passes through the outlet opening. A bimetal release pawl is arranged in the one cap parallel to the pin and being electrically connected to the fusible conductors. The pawl engages a rest on the tripping sleeve to counteract a biasing spring. The impact pin and the tripping sleeve are triggered independently one from the other either by a short-circuit current melting the auxiliary conductor, or by an overload which heats up the bimetal release and triggers the sleeve. Both the tripping sleeve and the impact pin act on a load interruptor arranged opposite the outlet opening.

REFERENCES:
patent: 2306153 (1942-12-01), Biermanns et al.
patent: 3593249 (1971-07-01), Sedgwick

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