Device for connection to a high-voltage grid carrying AC voltage and having a plurality of phases, the device having - an active part that has, for each phase, at least one phase connection for connection to a phase of the high-voltage grid, - a plurality of step windings (25, 26, 27) connected to one of the phase connections and the active part and having a plurality of taps and - a tap changer that has, for each step winding (25, 26, 27), a selector (28, 29, 30) for the current-free changeover from a current tap to a desired tap of the step winding and a load changeover switch (31, 32, 33) connected in series downstream of the selector for switching the current from the current tap to the desired tap, wherein - an impedance unit is arranged between each selector (28, 29, 30) and each load changeover switch (31, 32, 33), the impedance of which is able to be changed between a low impedance and a high impedance, - the active part for each phase has at least one main winding (22, 23, 24) that is connected to one of the step windings (25, 26, 27) at its end remote from the phase connection, - each selector (28, 29, 30) has a first selector contact part (10a, 11a) for connection to the current tap and a second selector contact part (10b, 11b) for connection to the desired tap, - each load changeover switch (31, 32, 33) has a first load changeover switch contact that is galvanically connected to the first selector contact part, a second load changeover switch contact that is galvanically connected to the second selector contact part and a moving part that makes contact with the first load changeover switch contact in a first switch position of the tap changer and with the second load changeover switch contact of the load changeover switch (31, 32, 33) in a second switch position, and - the impedance unit comprises a first and second component, wherein the first component is connected to the first selector contact part of each selector (28, 29, 30) and the first load changeover switch contact of each load changeover switch (31, 32, 33) and the second component is connected to the second selector contact part of each selector and the second load changeover switch contact of each load changeover switch, such that a current flow through one or the other component (16, 17) is enabled depending on the switch position of the tap changer, characterized in that each component (16, 17) of the impedance unit for each phase of the device has an impedance winding, wherein the impedance windings of a component (16, 17) are inductively coupled to one another and interconnected with one another such that, in the event of a symmetric current flow through the phases of the device, the reactances of the impedance windings of a component (16, 17) compensate for one another, such that the respective component (16, 17) has a lower resultant impedance value. - an active part that has, for each phase, at least one phase connection for connection to a phase of the high-voltage grid, - a plurality of step windings (25, 26, 27) connected to one of the phase connections and the active part and having a plurality of taps and - a tap changer that has, for each step winding (25, 26, 27), a selector (28, 29, 30) for the current-free changeover from a current tap to a desired tap of the step winding and a load changeover switch (31, 32, 33) connected in series downstream of the selector for switching the current from the current tap to the desired tap, wherein - an impedance unit is arranged between each selector (28, 29, 30) and each load changeover switch (31, 32, 33), the impedance of which is able to be changed between a low impedance and a high impedance, - the active part for each phase has at least one main winding (22, 23, 24) that is connected to one of the step windings (25, 26, 27) at its end remote from the phase connection, - each selector (28, 29, 30) has a first selector contact part (10a, 11a) for connection to the current tap and a second selector contact part (10b, 11b) for connection to the desired tap, - each load changeover switch (31, 32, 33) has a first load changeover switch contact that is galvanically connected to the first selector contact part, a second load changeover switch contact that is galvanically connected to the second selector contact part and a moving part that makes contact with the first load changeover switch contact in a first switch position of the tap changer and with the second load changeover switch contact of the load changeover switch (31, 32, 33) in a second switch position, and - the impedance unit comprises a first and second component, wherein the first component is connected to the first selector contact part of each selector (28, 29, 30) and the first load changeover switch contact of each load changeover switch (31, 32, 33) and the second component is connected to the second selector contact part of each selector and the second load changeover switch contact of each load changeover switch, such that a current flow through one or the other component (16, 17) is enabled depending on the switch position of the tap changer, characterized in that