Simple Wiring: Connect the input terminal to 3-phase 380V power supply and the output terminal to a 3-phase fan. If the fan rotation is reversed, swap any two output wires to correct the direction. Aluminum Alloy Material: The governor features an aluminum alloy housing that provides excellent oxidation and wear resistance, enhancing durability and extending service life. Adjustable: The output speed can be manually adjusted using the control knob, allowing users to set the desired speed according to operational requirements. Safety: Built with high-quality circuitry components, this speed controller ensures stable performance and reduces the risk of electrical hazards. Designed for safe and reliable operation. Wide Application: Suitable for speed control of various 3-phase AC fans, including purification fans, central air conditioning units, axial fans, and general-purpose fans. Item Type: Speed Controller Material: Aluminum Alloy Rated Voltage: 3-Phase AC 380V Input Power: 3-Phase AC 380V Output Power: 3-Phase Speed Regulation Power Output Adjustment Method: Manual Knob Adjustment Rated Current: 6A Application Range: Speed Control for 3-Phase 380V AC Fans Suitable Motor Power: Up to 2.2KW Speed Regulation Range: 1/3 of Motor Rated Speed to Full Speed (Stepless Speed Control) Package List: 1 x Speed Controller Note: Please ensure correct wiring and operation as per instructions.