How to control ceiling fans with 3-speed motor?
A 3-step control switch can be used to regulate the speed of ceiling fans with single phase 3-speed motor. Sentera 3-step control switches are available with or without OFF position.
They connect the 230 Volt mains to either the start winding of the motor or to one of the connection points on the main winding of the motor. So, the 230 VAC is connected to one of these three contacts only:
This makes it possible to adjust ceiling fan speed from low to high in 3 steps.