A consumption meter powered from a three-phase electricity net and arranged for measuring consumption data of a supplied utility, the meter comprises: - input terminals arranged for connection to an alternating current power line with three electric phases (P1-P3) and one neutral conductor, - a power supply connected to the input terminals and arranged to convert an input therefrom to a lower supply voltage for powering at least one circuit arranged to measure the consumption data, the power supply comprising: - a rectification circuit connected to the input terminals and arranged to form a first voltage between two intermediate terminals, the rectification circuit comprising a diode arrangement between the input terminals and the intermediate terminals, and - a conversion circuit arranged to down-convert the first voltage into the supply voltage, characterized in that the conversion circuit comprises an active regulation circuit wherein - the diode arrangement is arranged so that the first voltage periodically drops below a predetermined threshold voltage which is lower than a maximum voltage between the neutral and a superposition of the three electrical phases; and wherein - the active regulation circuit is arranged to convert energy from the intermediate terminals only in periods where the first voltage is below the predetermined threshold. - input terminals arranged for connection to an alternating current power line with three electric phases (P1-P3) and one neutral conductor, - a power supply connected to the input terminals and arranged to convert an input therefrom to a lower supply voltage for powering at least one circuit arranged to measure the consumption data, the power supply comprising: - a rectification circuit connected to the input terminals and arranged to form a first voltage between two intermediate terminals, the rectification circuit comprising a diode arrangement between the input terminals and the intermediate terminals, and - a conversion circuit arranged to down-convert the first voltage into the supply voltage, characterized in that the conversion circuit comprises an active regulation circuit wherein - the diode arrangement is arranged so that the first voltage periodically drops below a predetermined threshold voltage which is lower than a maximum voltage between the neutral and a superposition of the three electrical phases; and wherein - the active regulation circuit is arranged to convert energy from the intermediate terminals only in periods where the first voltage is below the predetermined threshold. - a rectification circuit connected to the input terminals and arranged to form a first voltage between two intermediate terminals, the rectification circuit comprising a diode arrangement between the input terminals and the intermediate terminals, and - a conversion circuit arranged to down-convert the first voltage into the supply voltage, - the diode arrangement is arranged so that the first voltage periodically drops below a predetermined threshold voltage which is lower than a maximum voltage between the neutral and a superposition of the three electrical phases; and wherein - the active regulation circuit is arranged to convert energy from the intermediate terminals only in periods where the first voltage is below the predetermined threshold.