Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1975-10-10
1978-09-12
Hickey, Robert J.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337168, 337219, 337237, H01H 7120
Patent
active
041141288
ABSTRACT:
An indicating composite sectionalized fuse is provided having a high-current interrupting section, and a mechanically-connected detachable low-current interrupting section in series therewith, with the low-current interrupting section including a pull-away indicating fuse-link cable, which indicates externally a blown condition of the fuse. The low-current interrupting section is replaceable, following a low-current interruption, which has no effect upon the high-current interrupting section, the latter remaining intact and may be further used. During high-current interruption, both sections are fused, and collectively contribute together to a quick interruption of the connected electrical circuit, again there being an external indicated condition of the blown condition of the fuse by an ejection of the fuse-link cable.
For certain applications, the high-current interrupting section may comprise a current-limiting fuse, so as to limit the value of "let-through" current during a heavy fault-current condition in the line.
REFERENCES:
patent: 2441692 (1948-05-01), Earle
patent: 2483577 (1949-10-01), Fahnoe
patent: 2572901 (1951-10-01), Yonkers
patent: 2809254 (1957-10-01), Edsall
patent: 3253106 (1966-05-01), Holsinger
Crout W. R.
Hickey Robert J.
Westinghouse Electric Corp.
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