Method and arrangement in connection with electric drive system

An arrangement in connection with an electric drive system, the electric drive system comprising an intermediate circuit (DC), with two or more supply units (S.1-S .n ) and two or more inverter units (I.1-I .n ) connected thereto, and an electric machine (G) having two or more three-phase windings galvanically separated from each other. Two or more inverter units (I.1-I .n ) are connected to the three-phase windings. The arrangement further comprises first main circuit switches (X11.1-X11 .n ) to galvanically separate each supply unit (S.1-S .n ) from a supply, second main circuit switches (X12.1-X12 .n ) to galvanically separate each supply unit (S.1-S .n ) from the intermediate circuit (DC), first intermediate circuit switches (X21.1-X21 .n ) to galvanically separate each inverter unit (I.1-I .n ) from the intermediate circuit (DC), and second intermediate circuit switches (X22.1-X22 .n ) to galvanically separate each inverter unit (I.1-I. n) from the electric machine (G).