| abstract |
A Roebel bar ( 10 ) for an electrical machine comprises a plurality of essentially parallel, transposed conductor elements ( 11, 12, 13 ), which, lying over and/or next to one another, form a bar with an essentially rectangular cross section, which is surrounded on the outside by an insulation ( 19 ) and has between the insulation ( 19 ) and the conductor elements ( 11, 12, 13 ) means ( 14, 14′; 15, 15′; 17, 18 ) for forming an inner corona protection (ICP). n In the case of such a Roebel bar, particularly effective inner corona protection is achieved by the fact that the means for inner corona protection comprise preformed, angled profiles ( 17, 18 ) of an electrically conducting material, which, running in the longitudinal direction of the Roebel bar ( 10 ), enclose the edges of the bar formed by the conductor elements ( 11, 12, 13 ), and to which the insulation ( 19 ) is applied. |