1、FOR THREE PHASE FAN WITH BLADE: 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