A momentary decrease of the line voltage level, is used to control a momentary decrease of the level of supply loads, is that the level of average electric power applied to dissipative loads (6) by an electric energy distribution network is reduced. The supply voltage decrease is detected at the various loads (6) and the average electric power originating from the distribution network and transmitted to the loads, is reduced following such a detection. This momentary decrease can also be used for controlling the scale of charges of the electricity meter of a residence. Thus, average power consumed by the loads (6) supplied by the distribution network can be easily controlled by the electricity production company.