S&c Electric Company

Mark W Stavnes

Thomas J Tobin

Michael G Ennis

Jorge R Montante

Jeffrey A Moore

A retention arrangement for a circuit interrupter to ensure that ensures the retention of the circuit interrupter in its mounting. The retention arrangement cooperates with a latch member of the mounting for the circuit interrupter. Accordingly, the circuit interrupter is retained in its mounting even where the dimensions of the circuit interrupter may vary from the nominal specified dimensions.

Retention arrangement for a circuit interrupter

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.

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Mount Prospect, IL, United States of America

Mark W Stavnes