Dimmer, AC 220V 9A 4000W SCR voltage regulator motor fan speed controller

High quality: Uses a high-performance SCR chip internally. Thickened metal casing, resistant to high temperatures and durable in use. Perfect performance: Continuously variable voltage adjustment with rotary knob, zero hysteresis, zero delay, fast response. The AC voltage regulator cover is equipped with a universal multi-purpose socket and a current display. Effectively protect high-performance thyristors against overvoltage and voltage limits with multiple protections. Note 1: The 4000W mentioned above refers to the maximum power when operating under resistive loads. The power under an inductive load is 1/3 of the resistive load. The resistive load concerns the Wolfram lamp, Diew, on the line excitation motor, and more. Electronic products with printed circuit boards must be used with caution. Note 2: The measured output voltage is a virtual voltage if there is no load. It must be connected to a 20W or higher load to measure the correct output voltage. The output is a Wehtselstrom metal casing and must be safely grounded.