This three-phase voltage stabilizer consists of three independent voltage regulators (NSN) assembled and switched within a single housing. The stabilizer is housed in a metal case, allowing it to be used floor-standing. The front panel features LCD indicators displaying (by default) the input and output voltage levels, current, and stage number. Specifications: Power: 27 kW Output voltage stabilization accuracy: ±% 4.5 Number of automatic regulation stages: 12 Operating range of input line voltages: 220 ÷ 450 V Operating range of output line voltages: 365 ÷ 397 V Maximum range of input line voltages: 105 ÷ 470 V Response time to emergency voltage change: up to 20 ms Thermal protection temperature: 105 ° C Dimensions: 310 × 430 × 950 Weight: 70 kg When using Optimum voltage stabilizers, the following will be ensured: • automatic network shutdown when the input voltage increases to 500 volts; • protection against short circuits and long-term overload at the output; • display of output and input voltage values; • indication of an error code in a shutdown situation; • elimination of the risk of damage to switching power supplies during a short-term network failure by switching them off;• thermal protection of the autotransformer.