| 摘要 |
Lower extremities of two structural, component-carrying columns are affixed to two channel members that are coupled to a base frame. The columns, members, and frame form a free standing assembly. Two other channel members, coupled to a top frame, are affixed to the columns' upper extremities. Corner posts couple the top and bottom frames. A bus bar is supported within frames and corner posts by an insulated elongated steel member having a through bolt hole. Two insulating washers seat within the hole at opposite sides thereof. A metal bolt fits within the washers and hole. A nut engages with the bolt. A flat washer fits between the bolt and one washer. A plurality of bus bars carry and distribute current at a particular voltage at a first phase. A similar plurality carry and distribute current at other phases. All bus bars are oriented parallel to one another spaced interjacently: first phase, second phase, third phase, first phase, second phase, etc. A distribution bus bar having a uniform cross-section in planes containing width and height rectangular coordinates are formed with a groove along two opposite sides thereof extending along its substantially greater length. Each groove can retain a carriage bolt that can be slid therealong. Two remaining opposing sides of the distribution bus bar are formed with longitudinally extending crevices, and intermediate and side longitudinal ridges, that provide for rigidity of the distribution bus bar during short circuit, a convenient extrusion shape for manufacture, and efficient heat sink.
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