Kit, universN, 300x500mm, for horizontal terminal blocks. Distribution internal installation system univers N kits in accordance with DIN EN 61439-1+2 or VDE 0660-600-1+2, internal grid in accordance with DIN 43870. For the construction of a type-tested switchgear combination up to 2500A, rated voltage 3AC-690 V /50Hz. Sealable contact protection covers reinforced by means of internal gas pressure process with four quick-release bolts and fastening towers each.