1pc 380VAC Variable Frequency Drive Speed Controller for 3-phase 4kW AC Motor Features: This variablefrequencydriveuses unique control method to realize high moment of force, high accuracy and wide speed regulating range driving, with high performance. It has good anti-trip performance and ability to adapt to rough power, temperature, humidity and dust interference, greatly improved stability. By optimizing PWM control technology and electromagnetic compatibility, it satisfies 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: AT3-4000X Power Source Phase: Three-phase Rated Voltage: Three-phase AC380V Suitable Motor Power: 4kW Filter: Built-in filter DC Power Supply Type: Voltage type Control Method: V/F closed loop Output Voltage Adjusting Method: PWM control Rated Current: 12A Maximum Output Frequency: 400Hz Weight: 1.5kg(approx.) Package Includes: 1 x Variable Frequency Drive Note:When adjusting parameter, the variablefrequencydrivemust stop working, otherwise it will not be able to save parameter setting.