EARTHQUAKE-PROOF METALCLAD CURRENT DUCT Russian patent published in 1997 - IPC

FIELD: electrical engineering. SUBSTANCE: current duct has lengthwise arranged sections joined together by means of flexible links in the form of strips and corrugated flexible cylindrical sleeves enabling current ducts sagging without damage together with building structure. Each section has conducting bus, insulators, and casing with built-in rubber hinges functioning as vibration mounts absorbing energy of various acting factors. Rubber hinges enable sections to make axial, radial, and angular displacements within wide frequency range without damage. Hinge spindles rest on brackets rigidly fixed to building structure. Rubber hinges are cylinder mounted in brackets. Space between cylinder shell and hinge spindle is filled with absorbing rubber. EFFECT: improved mechanical endurance of current duct. 2 cl, 4 dwg