Rte Corporation

Gordon T Borck

Frank J Muench, Jr

An under oil expulsion fuse cartridge assembly includes a tubular housing of non-electrical conductive material, an electrically conductive contact removably threadedly mounted on each end of the housing, and a replaceable fuse assembly removably received within the tubular housing. One of the end contacts incorporates a pressure chamber providing a flushing and cleaning operation during the interruption process. The fuse assembly includes a fuse liner tube in a fuse link therein in the form of a flat ribbon element electrially connected to each of the end contacts. One end of the fuse link is mounted on a thin disc which includes a plurality of projecting lands that prevent direct engagement of the fuse link with the end contact to avoid breaking the fuse link. The fuse link also includes a plurality of holes formed therethrough covered by a eutectic material having a desired melting temperature so that current interruption occurs at a predetermined operating temperature.

Under oil expulsion fuse cartridge assembly

A modular under oil expulsion fuse cartridge assembly includes a tubular housing of non-electrical conductive material, an electrically conductive contact removably threadedly mounted on each end of the housing, and a replaceable fuse assembly removably slidably received within the tubular housing. The fuse assembly includes a fuse support tube and a fuse link supported within the tube electrically connected to each of the end contacts. The end contacts are designed with ramps or tapered ends to prevent arcing along the insulating surface of the fuse housing, and are located on the outside housing surface of the device away from the operating or arcing region of the assembly to provide a maximum strike distance between the end contacts. At least one of the electrical connections of the fuse link includes a plurality of deformable fingers movable between a first position which permits the fuse assembly to be slidably received within the housing, and a second position in which the fingers are spread outwardly by a clamping nut into engagement with an end contact.

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Cudahy, WI, United States of America

Gordon T Borck