Modular insulative support base for electrical switchgear
AssigneeGeneral Electric Company
InventorWilliam F. Olashaw
Life of this patent
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Abstract
A switchgear construction utilizes improved modular bases to serve as individual, insulative backwalls for the stacked array of cubicles in a vertical switchgear section. The back sides of the bases, assembled to the switchgear frame in end-to-end vertical relation, are channelled to receive and mount H-shaped vertical busbars in electrically isolated, side-by-side relation. Apertures in the bases accommodate electrical connections of device line terminal run-in straps with the vertical bus, and the rearward extension of device load terminal runbacks which isolatively pass through openings in the vertical bus. The vertical bus, the horizontal bus, and the bus joints therebetween are completely isolated from external contact.
Claims8
In an electrical distribution equipment utilizing H-shaped vertical busbars for distributing electrical power to a plurality of loads via electrical devices accommodated in a stacked array of cubicles, a plurality of modular, structurally rigid, insulative support bases, each comprising in combination:
- A. a rectangular, generally planar structure having marginal side edge portions for mounting said bases to the equipment framework in vertical end-to-end relation such as to constitute a succession of cubicle backwalls;
- B. a plurality of integral, vertically elongated, laterally spaced, parallel walls outstanding from the back side of said base to define at least three side-by-side channels in which the vertical busbars are individually accommodated;
- C. means forming a pair of parallel running troughs in the floor of each said channel accepting the forwardly extending portions of the H-shaped vertical busbar flanges while the flange interconnecting web thereof rests against said channel floor;
- D. means forming a set of at least three transversely aligned, line-side depressions in the front side of said base, each said depression being straddled by said pair of troughs in a different one of said channels, each said depression including an opening into its associated channel floor to expose the vertical busbar web thereat for electrical connection with a run-in electrical connector;
- E. means forming a set of at least three transversely aligned load-side depressions in the front side of said base in aligned, vertically spaced relation with said line-side depressions, each said load-side depression communicating with the open interior of a sleeve integrally formed with said base and extending rearwardly into the associated one of said channels through a gap in the web of the vertical busbar therein;
- F. vertical arrays of preformed holes in the floors of said channels which accomodate bolts clamping the webs of the vertical busbars to said base;
- and
- G. means provided in said load-side depressions for mounting runback connectors extending rearwardly through said sleeves in isolated relation with the vertical busbars.
Dependencies are inferred from the claim text.