Connection device for two three-phase busbar sets placed within orthogonal enclosures of a high-voltage metal-enclosed gas-insulated equipment

摘要

1. Device to connect three-phase conductors of a high voltage metal-clad installation insulated by an insulating gas with high dielectric strength, especially sulfur hexafluoride and comprising : - a first set (1) of three-phase bars (1a, 1b, 1c) extending according to the parallel edges of a triangular prism inside a first tubular casing (2) filled with said gas, - a second set (7) of three-phase bars (7a, 7b, 7c) disposed according to the parallel edges of a prism in a similar way inside a second tubular casing (6) filled with said gas and extending orthogonally to the direction of the first casing (2), - a hollow auxiliary enclosure (9, 9') to connect the first and second orthogonal casings (2, 6), and containing three connection conductors (11a, 11b, 11c; 11'a, 11'b, 11'c) for the interconnection of the bars (1a, 1b, 1c; 7a, 7b, 7c) of corresponding phases A, B, C of said first and second sets (1, 7), characterized in that two connection conductors (11b, 11c) of the bars (7b, 7c; 1b, 1c) belonging to phases B and C extend parallel between them inside the enclosure (9) according to a rectilinear direction perpendicular to the direction of said bars, and that the third connection conductor (11a) associated with the bars (7a, 1a) of the phase A shows an incurvated shape, the curvature radius of which depends of the transverse gap d'accommodated between the bars (7a, 7c) symmetrical relative to a plan diametrical to the second casing (6) running by the bar (7b) of the second three-phase set (7).