Features: This variable frequency drive uses unique control method to realize high moment of force, high accuracy and wide speed regulating range driving, with high performance.Ithas good anti-trip performance and ability to adapt to rough power, temperature, humidity and dust interference, greatly improved stability.Byoptimizing PWM control technology and electromagnetic compatibility, itsatisfies users' requirement of low noise, low electromagnetic interference.Simple to operate and wire, connect to wires by screw terminals which are more convenient.Designed with large heat sink for better heat dissipation.Specifications:Model: AT3-4000XPower Source Phase: Three-phaseRated Voltage: Three-phase AC380VSuitable Motor Power: 4kWFilter: Built-in filterDC Power Supply Type: Voltage typeControl Method: V/F closed loopOutput Voltage Adjusting Method: PWM control Rated Current: 12AMaximum Output Frequency: 400HzWeight: 1.5kg(approx.)Package Includes:1 x Variable Frequency DriveNote: When adjusting parameter, the variable frequency drive must stop working, otherwise it will not be able to save parameter setting..