Abstract: Disclosed is an electric-machine stator bar winding provided with an arrangement for electric insulation of end connections of extreme bars of different phase winding groups, that comprises box-type dielectric screens encompassing said connections. Each of the screens is built up of channel-shaped members made from a thermosetting material and having bent end portions. These members are so installed that adjacent walls of a pair of the screens in one interphase region of the end windings, lying in the radial planes of the stator are formed by adjoining walls of the angle-shaped members, the walls of the screens which are opposite to the adjoining walls are formed by the walls of the channel-shaped members, whereas the walls of the screens, lying in the tangential planes of the stator are formed by the flanges of the channel-shaped and angle-shaped members, the bent end portions of these members adjoining a part of involume sections of the bar end portions.