FOR THREE PHASE FAN WITH : This governor is a power regulation method, which is only suitable for three phase AC fans with fan blades, and not applicable to other types of loads without fan blades 2. GOOD HEAT DISSIPATION: The thickened all aluminum case effectively dissipates heat and does not rust, making the machine performance more stable and efficient 3. WIDELY APPLICABLE: Used for the speed regulation of three phase purification fans, central air conditioning shunts, axial fans, ordinary fans, and all three phase fans 4. TECHNICAL PARAMETERS: Rated current for 12A, suitable motor power below 4KW, rated voltage for 380V, possess excellent performance 5. STABLE AND DURABLE: AC motor controller come with stable structure, excellent performance and long service life. Item Type: AC Motor Controller Material: Aluminum alloy Rated Voltage: Three phase AC 380V Input Power: Three phase AC 380V Output Power Supply: Three phase speed regulation power Output Adjustment Method: Manual knob adjustment Rated Current: 12A Application Range: Three phase 380V AC fan speed regulation Suitable Motor Power: Below 4KW Speed Regulation Range: 1/3 motor rated speed to full speed (intermediate stepless speed regulation). 1 x AC Motor Controller. Pay attention to the correct operation.