DESCRIPTION: 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. Advantages: Low noiseIncreased noise immunityHigh speedCan be used at sub-zero temperatures and high humidityIncreased fire safetyMaximum number of protectionsConvenient connectionDoes not distort the sine waveResistance to mechanical stress Characteristics: Type - inverterPhase - three phasesEfficiency, % - 98Disconnection in transit - 260±5 VResponse time, ms - 1Noise level, dB - 34-40, depending on the loadInput range - 130-330 V (per phase)Maximum current, A - 32Maximum power, kW - 21Mounting method - wall-mounted / floor-standingCooling - forcedOutput voltage - 220 V (per phase)Stabilization accuracy - ±0.5%Max. Power at Umin, kW - 4.1 (per phase)Stabilization step - -Disconnection at Umin - 105 V (per phase)Disconnection at Umax - 330 V (per phase)On delay - 4.5-7.5 sNumber of steps - steplessDimensions (H x W x D), mm - (450 x 420 x 160)*3Weight, kg - 21*3Protection class - IP20Humidity, no more than - 40…80%Color - light grayTemperature range - Operating range from plus 1°С to 40°С indoors