The Smart-81 is a three-phase voltage stabilizer for an apartment or house with a maximum power of 27 kW per phase, belonging to the Volter Smart series, designed to provide stabilized voltage to all types of electrical consumers when powered from a grid with unsatisfactory voltage quality. It is a double-conversion device without energy storage.
The stabilizer ensures that the output voltage is unaffected by both changes and surges in the input voltage, and by changes in the load. To achieve this, it contains a reference voltage source with grid frequency and stable magnitude, against which the stabilizer's output voltage is continuously compared. Thanks to this design, the stabilizer does not react even to very sharp, instantaneous changes in the input voltage, and reacts very quickly to any change in load. Independence from the type of loads is also implemented, meaning the stabilizer works equally well with active, capacitive, and inductive loads, provided the output current does not exceed its permissible output current.
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