Voltage stabilizer Volter-21 pttm (3*7)

The PTTM-21 is a three-phase voltage stabilizer for an apartment or home with a maximum power of 21 kW. It belongs to the Volter PTTM series and is designed to provide stabilized voltage to all types of electrical consumers when powered from a grid with poor voltage quality. This is a double-conversion device without energy storage.

The stabilizer ensures that the output voltage is unaffected by both fluctuations and surges in the input voltage and changes in load. To achieve this, it contains a reference voltage source with a stable voltage at the grid frequency, to which the stabilizer's output voltage is continuously compared. Thanks to this design, the stabilizer is unaffected even by very sharp, almost instantaneous changes in the input voltage, and responds very quickly to any load changes. Load independence is also implemented, meaning the stabilizer operates equally with active, capacitive, and inductive loads, as long as the output current does not exceed its permissible output current.
To prevent overheating and thermal protection under severe operating conditions (full load, high ambient temperature), the voltage stabilizer is equipped with a forced cooling system that is activated when the internal temperature exceeds 60°C. To eliminate noise, two fans operating at low speeds are used.