Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1987-02-24
1988-04-05
Broome, H.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337217, 337291, H01H 3900, H01H 8504
Patent
active
047361816
ABSTRACT:
A fuse link for an expulsion fuse used in connection with high voltage electrical transmission lines. The fuse link has an outer assembly in the form of a tube, a fuse element housed within the outer assembly, electrical connecting means serially connected to the fuse element to provide an electrical current path therethrough and, an arc-quenching medium, such as boric acid, contained within the outer assembly and in close proximity to the fuse element. In use, when the fuse element fuses due to excessive current a portion of the electrical connecting means is expelled from the outer assembly and the arc-quenching medium acts to inhibit a discharge of sparks due to arcing. The fuse element may comprise one or more fuse wires capable of withstanding a tensile force applied to it prior to fusing. Inhibiting any discharge of sparks is important to prevent accidental starting of fires particularly in forested areas.
REFERENCES:
patent: 2174767 (1939-10-01), Triplett et al.
patent: 2750470 (1956-06-01), McBride
patent: 3344251 (1967-09-01), Misare
patent: 3374329 (1968-03-01), Bronikowski
patent: 3735315 (1973-05-01), Swarbrick et al.
Broome H.
Morlynn Ceramics Pty. Ltd.
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