The machine has a rotatably supported rotor, and a stator arranged around the rotor. A housing (2) is arranged around the stator, where the stator has a stator winding with three coils. The coils comprise dissipation ends and star point ends (10-12) that are connected with one another by short circuiting bridges (13, 15) to form a star point (5). The star point is arranged within the housing, where the short circuiting bridges are designed such that electrical separation takes place between the star point ends. A current transformer measures single phases of the star point.