Volter Smart-21 (3*7) voltage stabilizer (frost-resistant)

The Smart-21 is a three-phase voltage stabilizer for an apartment or house with a maximum power of 7 kW per phase. It belongs to the Volter Smart series and is designed to provide stabilized voltage to all types of electrical consumers when powered from a grid with unsatisfactory voltage quality. It can be used in unheated rooms or outdoors in a place protected from precipitation.

The stabilizer ensures that the output voltage is not affected by changes in input voltage, surges, or load changes. To achieve this, it contains a reference voltage source with a stable value at the grid frequency, with which the stabilizer's output voltage is continuously compared. Thanks to this design, the stabilizer does not react even to very sharp, almost instantaneous changes in input voltage, and responds very quickly to any change in load. It also operates independently of load types, meaning the stabilizer operates equally well with active, capacitive, and inductive loads, as long as the output current does not exceed its permissible output current.