Time delay fuse

Details Time delay fuse Time delay fuse

1981-12-16

1983-11-22

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337293, 337295, H01H 8504

Patent

active

044172249

ABSTRACT:
A time delay fuse is disclosed which does not require stored energy devices or separated chamber construction, and is dependent on the mass of the low melting point material and metal connector blocks to absorb heat on short duration overloads. The time delay fuse includes one or more fusible links having a combination of relatively high melting point material and a relatively low melting point mass enabling short circuit protection at a multiple of rated current and sustained overload protection at values above rated current. The number of fuse links used in the fuse is directly related to the intended current rating for the total fuse but may be from one to at least 15 links.

REFERENCES:
patent: 713831 (1902-11-01), Badeau
patent: 2018556 (1935-10-01), Hope
patent: 2800554 (1957-07-01), Dannenberg et al.
patent: 3123693 (1964-03-01), Kozacka
patent: 3735312 (1973-05-01), Nagel
patent: 4058784 (1977-11-01), Gaia

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