Gas evolving clamp for current limiting fuse

Details Gas evolving clamp for current limiting fuse Gas evolving clamp for current limiting fuse

1976-03-08

1978-07-04

Hickey, Robert J.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337161, 337166, 337227, 337290, H01H 8504, H01H 8514

Patent

active

040991539

ABSTRACT:
A current limiting fuse of the general purpose type utilizes a mandrel which has a plurality of longitudinally oriented and radially spaced ceramic rods around which is wound a fuse element. Gas evolving clamps are disposed along the mandrel to hold the fuse element against the rods of the mandrel. This arrangement tends to maintain the spacing of any given portion of the wound fuse element relative to the other portions thereof. In addition, the gas evolving material evolves arc quenching gas in localized regions between the clamps and the rods during a fusing operation. The pressure of the gas as it is expelled from the localized regions tends to prevent the formation of fulgurites in the regions after the fusing operation has been completed. A fulgurite if formed would enhance the opportunity for a restrike of the arc which is undesirable.

REFERENCES:
patent: 3706951 (1972-12-01), Mikulecky

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