Voltage sensor for sensing an AC voltage of a HV/MV power conductor, the voltage sensor comprising a capacitive voltage divider for sensing the AC voltage, the voltage divider comprising - a high-voltage portion comprising one or more high-voltage capacitors, electrically connected in series with each other; - a low-voltage portion comprising one or more low-voltage capacitors, electrically connected in series with each other between the high-voltage portion and electrical ground; - a signal contact, electrically arranged between the high-voltage portion and the low-voltage portion, for providing a signal voltage, indicative of the AC voltage, wherein the low-voltage portion further comprises, for adjusting the common overall impedance of the low-voltage portion towards a desired impedance, a plurality of adjustment capacitors and a plurality of switches, wherein each switch is associated and electrically connected to one or more of the adjustment capacitors and can be brought into a connect state and into a disconnect state such that the switch - in its connect state, electrically connects the adjustment capacitor(s), to which it is associated, in parallel to at least one of the one or more low-voltage capacitors; - in its disconnect state, electrically disconnects at least one electrode of the adjustment capacitor(s) to which it is associated from the low-voltage capacitor(s) to which, in its connect state, it connects the associated adjustment capacitor, and wherein the overall impedance of the high-voltage portion and the overall impedance of the low-voltage portion of the voltage divider are adapted such that, by bringing one or more of the switches into their connect state, the voltage divider has, for an AC voltage of between 5 and 25 kV phase-to-ground and a frequency of between 40 and 70 Hertz, a dividing ratio of 3077 ±0.5% or of 6154 ±0.5% or of 6769 ±0.5% or of 10 000 ±0.5%. - a high-voltage portion comprising one or more high-voltage capacitors, electrically connected in series with each other; - a low-voltage portion comprising one or more low-voltage capacitors, electrically connected in series with each other between the high-voltage portion and electrical ground; - a signal contact, electrically arranged between the high-voltage portion and the low-voltage portion, for providing a signal voltage, indicative of the AC voltage, wherein the low-voltage portion further comprises, for adjusting the common overall impedance of the low-voltage portion towards a desired impedance, a plurality of adjustment capacitors and a plurality of switches, wherein each switch is associated and electrically connected to one or more of the adjustment capacitors and can be brought into a connect state and into a disconnect state such that the switch - in its connect state, electrically connects the adjustment capacitor(s), to which it is associated, in parallel to at least one of the one or more low-voltage capacitors; - in its disconnect state, electrically disconnects at least one electrode of the adjustment capacitor(s) to which it is associated from the low-voltage capacitor(s) to which, in its connect state, it connects the associated adjustment capacitor, and wherein the overall impedance of the high-voltage portion and the overall impedance of the low-voltage portion of the voltage divider are adapted such that, by bringing one or more of the switches into their connect state, the voltage divider has, for an AC voltage of between 5 and 25 kV phase-to-ground and a frequency of between 40 and 70 Hertz, a dividing ratio of 3077 ±0.5% or of 6154 ±0.5% or of 6769 ±0.5% or of 10 000 ±0.5%.