Protective casing for electric distribution busbars

A protective casing (1) for electric distribution busbars (7), constructed of insulating material and adapted to surround a region of an array of electric distribution busbars, said casing being made up of two identical half-casings (3) each provided on the periphery of an open face with recesses (9A, 9B, 11A, 11B, 13) which form entrance and exit passageways for the busbars (7) after coupling of the half-casings (3), wherein the two half-casings are coupled together by displacement in mutual sliding motion in a coupling direction substantially perpendicular to said array up to a mutual coupling position which is variable according to the dimension of the busbars parallel to the direction of sliding displacement, wherein a coupling region of each half-casing comprises an external engagement region (18A, 20A, 22A, 24A) on one side of a median plane (P--P') and an internal engagement region (18B, 20B, 22B, 24B) on the other side of said median plane, the two engagement regions being separated by recessed regions (26, 13) through which said median plane (P--P') passes, wherein said casing comprises abutment means for limiting the range of travel of the half-casings in sliding motion with respect to each other in the coupling direction in a position of maximum compactness in which a free end of the external engagement region of each half-casing (3) is substantially located along the periphery of an outer front face (16) of the other half-casing (3).

A protective casing (1) for electric distribution busbars (7), constructed of insulating material and adapted to surround a region of an array of electric distribution busbars, said casing being made up of two identical half-casings (3) each provided on the periphery of an open face with recesses (9A, 9B, 11A, 11B, 13) which form entrance and exit passageways for the busbars (7) after coupling of the half-casings (3), wherein the two half-casings are coupled together by displacement in mutual sliding motion in a coupling direction substantially perpendicular to said array up to a mutual coupling position which is variable according to the dimension of the busbars parallel to the direction of sliding displacement, and wherein a coupling region of each half-casing comprises an external engagement region (18A, 20A, 22A, 24A) on one side of a median plane (P--P') and an internal engagement region (18B, 20B, 22B, 24B) on the other side of said median plane, the two engagement regions are separated by recessed regions (26, 13) through which the median plane (P--P') passes, the half-casings (3) being connected by screw attachment means (37) extending within at least one insulating sleeve between adjacent conductive busbars (7), and wherein the insulating sleeve comprises two identical elementary sleeves (21) each forming part of one of the half-casings (3), each elementary sleeve comprising at least one outer tongue (23) and an inner tongue (25) which is angularly displaced with respect to the outer tongue and adapted to slide within the outer tongue of the elementary sleeve of the other half-casing.