It all depends on the minimum voltage

The DIN IEC 60038 and VDE 0175 standards specify on a national and international basis that the actual voltage of single-phase and three-phase power grids can deviate from the nominal voltage by plus/ minus ten percent. In conformity with these tolerances, single-phase consumers must operate reliably within a range of 207 to 253 volts. Analogously, this applies to three-phase appliances in the range from 360 to 440 volts. For the design of electrical devices, this means that they have to reliably achieve the nominal values at the minimum voltage level and that the thermal load is not excessive at the maximum permissible voltage. Consequently, electricity can be saved by supplying electrical consumers only with the amount of voltage that they actually need.