Feature:1. Automatic Voltage Regulation: The inverter can choose dynamic voltage regulation, static voltage regulation and unregulated voltage regulation three ways according to the needs2. Low Frequency and Large Torsion: This inverter start torsion can achieve twice the rated torsion, the constant torsion output within 50HZ3. Multiple Protection: The inverter protects itself from overload, overheat, overvoltage, overcurrent, undervoltage, phase loss, grounding, short circuit and stall4. High Performance: The inverter can soft start and stop, energy saving, stepless speed regulation, low noise operation, flame retardant, moisture corrosion salt and spray resistant5. Wide Range of Application: The inverter is widely used in construction site, factory, water plant, hotel, bath, central air conditioning water system, paper machinery factory, shopping mall, escalator, farm, sewage treatment plant, fire hospital traffic, machine tool equipment, automation equipment etc.Specification:Item Type: Variable Frequency DriveShell Material: ABSModel: AT903-7.5KWPower: 7.5KWFrequency Modulation Range: 0-400HzPower Phases Number: Three phaseSize: Approx. 25x16.5x17.5cm/9.8x6.5x6.9inApplication Machine: Motors, mixers, ball mills, water pumps, cranes, conveyors, air compressors, fans, CNC machine tools, etc..Package List:1 x Variable Frequency Drive1 x ManualNote:Please read the instruction manual carefully before use, the input voltage is three phase 380VAC, please do not overload operation.