Fusible element for a current-limiting fuse having groups of spa

Details Fusible element for a current-limiting fuse having groups of spa Fusible element for a current-limiting fuse having groups of spa

1980-10-06

1982-11-16

Beha, Jr., William H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337295, H01H 5510

Patent

active

043597084

ABSTRACT:
A fusible element of a current-limiting fuse has a plurality of hole groups with at least two holes in each group. Separation between adjacent holes within the group is substantially less than separation between adjacent groups. Accordingly, while fault currents driven by voltages at two different levels are effectively extinguished, the back voltage developed by the fuse during interruption of a fault current driven by the lower voltage is prevented from exceeding a selected value.

REFERENCES:
patent: 4123738 (1978-10-01), Huber
patent: 4204183 (1980-05-01), Blewitt

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