Feature: 1. Automatic Voltage Regulation: The inverter can choose dynamic voltage regulation, static voltage regulation and unregulated voltage regulation three ways according to the needs 2. Low Frequency and Large Torsion: This inverter start torsion can achieve twice the rated torsion, the constant torsion output within 50HZ 3. Multiple Protection: The inverter protects itself from overload, overheat, overvoltage, overcurrent, undervoltage, phase loss, grounding, short circuit and stall 4. High Performance: The inverter can soft start and stop, energy saving, stepless speed regulation, low noise operation, flame retardant, moisture corrosion salt and spray resistant 5. 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 Drive Shell Material: ABS Model: AT903-7.5KW Power: 7.5KW Frequency Modulation Range: 0-400Hz Power Phases Number: Three phase Size: Approx. 25x16.5x17.5cm/9.8x6.5x6.9in Application Machine: Motors, mixers, ball mills, water pumps, cranes, conveyors, air compressors, fans, CNC machine tools, etc.. Package List: 1 x Variable Frequency Drive1 x Manual Note: Please read the instruction manual carefully before use, the input voltage is three phase 380VAC, please do not overload operation.