H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/146
H01H 85/12 (2006.01) H01H 85/40 (2006.01)
Patent
CA 1088600
HIGH CONTINUOUS CURRENT CAPACITY OIL EXPULSION FUSE ABSTRACT OF THE DISCLOSURE An oil expulsion fuse has multiple rupture-resistant fuse wire chambers for providing fault current protection in high voltage distribution circuits in the 25-35 KV range. In preferred forms, the fuse has a Teflon (a Trademark) core defining three discrete, small diameter cylindrical chambers, each containing a respective fuse wire, whereby sufficient deionizing gas flow is generated upon fusing of the wires to effectively extinguish arcs formed in the chambers, even in t he face of high recovery voltage rates associated with distribution voltages above 15 KV. The ampacity of the fuse per unit cross-sectional area of fuse wire is increased over single wire fuses by virtue of greater heat loss by transverse convection from the multiple wires to oil in the chambers.
297418
A. B. Chance Company
Gowling Lafleur Henderson Llp
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