Double tubular time-lag fuse having improved breaking capacity

Details Double tubular time-lag fuse having improved breaking capacity Double tubular time-lag fuse having improved breaking capacity

1979-01-15

1981-08-11

Beha, Jr., William H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337187, 337248, 337280, H01H 8538

Patent

active

042837006

ABSTRACT:
A time-lag fuse with improved breaking capacity is made of double-tubular construction comprising an inner tube made of a material having high thermal conductivity and low thermal impact resistance and an outer tube made of a material with low thermal conductivity but high thermal impact resistance. No arc-quenching material is required and greater safety is afforded when the fuse is subjected to an overload current.

REFERENCES:
patent: 2135164 (1938-11-01), Brock
patent: 2773960 (1956-12-01), Sundt et al.
patent: 4100523 (1978-07-01), Arikawa et al.

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