Busbar system, accessories, bar center distance 60mm, 3-pole busbar holder for TT profile, consists of 2 busbar holders and 2 end covers, 8US busbar system for the installation of protective devices such as fuse switch disconnectors and circuit breakers - safe, space-saving, clear. The use of the Siemens 8US busbar systems offers a wide range of options for the installation of rail-adaptable connection, switching and installation devices. The space-saving modular design and quick-assembly contacting ensure economical electrical equipment in today's installation distribution board construction. The assembly takes place on longitudinal beams, the rail spacing is 60 mm.