The present invention relates to a rail turntable (1) for a rail
system (2) designed for moving
transformer substations (31) and / or transformers, comprising two first rails (3a, 3b) arranged parallel to each other and two second rails (4a, 4b) arranged parallel to each other, each crossing the first rails (3a, 3b), wherein the rail turntable (1) is designed for arrangement in the crossing area (5) of the first and second rails (3a, 3b, 4a, 4b), with at least one crossing block (6) for arrangement in at least one crossing section (8) formed by a crossing of a first and a second rail (3a, 3b, 4a, 4b), and a curved rail (9), in particular circular, for arrangement in the crossing area (5) of the first and second rails (3a, 3b, 4a, 4b), in particular for connecting all crossing sections (8).and at least one transfer piece (10) that can be moved on the crossing block (6) for optionally connecting and / or
coupling two facing sections of the curved rail (11a, 11b, 11c, 11d), two facing sections of a first rail (12a, 12b, 12c, 12d, 12e, 12f) and / or two facing sections of a second rail (13a, 13b, 13c, 13d, 13e, 13f).