H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/145
H01H 85/42 (2006.01) H01F 27/40 (2006.01)
Patent
CA 1186356
ABSTRACT OF THE DISCLOSURE A protective fuse comprising a fusible element disposed within an enclosure formed by a gas generating fiber tube connected at one end to a conductor rod and at the other end to an arc intercepting member. The arc intercepting member is connected to an elongated tubular resistor element which in turn is connected at its opposite end to a cap comprising a conductor connected to the fusible element. Upon parting of the fusible element an arc established by the fault current comes into contact with the arc intercepting member so that a circuit is established through the resistor element thereby momentarily reducing the fault current to a level which can be extinguished by the deionizing gases generated within the interior of the fuse. The conductor rod is formed of a magnetic material which is capable of generating a substantial magnetic flux which functions to bias the arc against the interior wall of the fiber tube to enhance the generation of deionizing gases. The resistor element is soldered to the arc intercepting member and the conductor cap with solders having different melting points whereby the cap may be blown off the resistor to lengthen the distance between conductor elements.
407883
Gowling Lafleur Henderson Llp
Warco Inc.
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