Fuse tube and method of manufacture thereof

Details Fuse tube and method of manufacture thereof Fuse tube and method of manufacture thereof

H - Electricity

01

H

H01H 69/02 (2006.01) H01H 85/165 (2006.01) H01H 85/38 (2006.01)

Patent

CA 2555016

An arc-quenching composition is provided including a filler, a fiber and a binder. Preferably, the filler includes an arc-quenching compound such as melamine. The binder includes a thermosetting resin to facilitate forming of the arc-quenching composition into an arc-quenching fuse tube. In a preferred arrangement, an outer tube is formed over the arc- quenching fuse tube to provide an overall high-strength fuse tube. Also in a preferred arrangement, in order to provide a fuse tube that is capable of operation over an extremely wide current range, the inner arc-quenching tube includes a tapered bore. According to one fabrication technique, the outer tube is formed over the arc-quenching inner tube before the curing of the inner tube such that a single structure results.

Composé d'extinction d'arc comprenant un agent de remplissage, une fibre et un liant. Idéalement, l'agent de remplissage comprend un composé d'extinction d'arc comme de la mélamine. Le liant comprend une résine thermodurcissable facilitant la formation du composé d'extinction d'arc dans un fusible à cartouche d'extinction d'arc. Selon un mode de réalisation préféré, un tube extérieur entoure le fusible à cartouche d'extinction d'arc pour créer un fusible à cartouche très robuste dans l'ensemble. De plus, selon un mode de réalisation préféré, afin de créer un fusible à cartouche pouvant accommoder une gamme très large d'intensité de courants, le tube interne d'extinction d'arc comporte un alésage conique. Selon une des techniques de fabrication, le tube extérieur est placé autour du tube intérieur d'extinction d'arc avant la cuisson du tube intérieur de manière à créer une structure unique.

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