Abstract: A multiple operation cutout and a method of operating the same and providing multiple fuse operation provides an assembly for a plurality of fuses. A mechanism individually and sequentially engages the fuses responsive to operation of the fuses.

Abstract: 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.

Abstract: A fuse cartridge is provided having improved tensile strength via the provision of a mechanical strain wire that is in parallel with a fusible element mechanically but not electrically, thereby increasing the tensile strength of the fusible element without altering the electrical time-current characteristics of the fusible element. In a preferred embodiment, the strain wire is provided by looping a fusible element wire from a first terminal around a second terminal and back near the first terminal but electrically insulated therefrom.

Abstract: 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.

Abstract: 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.

Abstract: A current-limiting device is provided that defines a cavity of predetermined dimensions and an elongated circuitous path through the cavity. The device also includes provisions for supporting a current-limiting fusible element along the path. The cavity is filled with a pulverulent arc-quenching filler material. To increase the heat-withstand capabilities of the current-limiting device, heat withstand facilities are provided between the portions of the circuitous path to maximize the length of the path while minimizing the corresponding volume of the device, e.g. via heat resistant materials, the addition of heat shielding materials to the cavity-defining device structure or the structure of support portions of the cavity-defining structure. In one specific arrangement, the path of the fusible element is defined by one or more U-shaped sections. The fusible element includes a configuration of steps or bends along its length to maximize the path length of the fusible element.

Abstract: 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.