Speed Control Regulator
Electronic and transformer-based speed controllers (dimmers) for adjusting the speed of fans and ventilators: selecting the right regulator by current capacity.
Products (2)
- Aircol FC 200 5-Speed Transformer Speed Switch, Dimmer, Max. 1 A – Request a quote (out of stock)
- Vortice C 1,5 Electronic Speed Controller, Dimmer, Max. 1.5 A – $80.41
What does a speed control regulator do?
Fan speed control regulators allow the flow rate to be varied as needed by adjusting the speed of ventilators and fans. This means the fan does not always have to run at full power; noise levels drop, energy consumption decreases, and comfort improves. They are used in many applications ranging from bathroom and kitchen ventilators to duct fans, roof fans to industrial ventilators.
Regulator types
- Electronic speed switches (dimmers): Offer stepless adjustment; wall-mounted with a compact design.
- Transformer-based (stepped) speed switches: Offer a fixed number of speed steps; help the motor run more quietly at low speeds.
The current capacity of models in the category is stated in the product name (e.g., maximum 1.5 A); this value must be higher than the total current of the fan or fans to be connected.
Compatibility
Not every fan motor is suitable for speed control. Some single-phase shaded-pole and capacitor-run motors can be controlled with a regulator, while certain motor types and electronically controlled fans are not compatible with these regulators. Whether the fan is suitable for speed control is stated in its user manual or on its label. An incompatible regulator can cause noise, overheating, and failure in the motor.
Installation and use
The regulator is connected in series with the fan's supply line; wiring must be done with the power off and in accordance with the wiring diagram. On electronic regulators, the minimum speed setting must not be reduced below the value at which the fan can start; otherwise the motor may heat up without turning. The regulator must be used in an appropriate enclosure in damp locations.
Frequently asked questions
Can more than one fan be connected to a single regulator?
They can be connected if the total current does not exceed the regulator's capacity. It is recommended that the fans have the same motor type.
Why does the electronic regulator hum?
Some motors may hum due to electronic control at low speeds. In this case, a transformer-based regulator is a quieter alternative.
Does a regulator save energy?
Running the fan at a lower speed than necessary reduces consumption. The amount of savings depends on usage patterns.
Can it be fitted to any ventilator?
No; it must only be used with fans that have motors suitable for speed control.
What is the advantage of a transformer-based regulator?
It provides stepped and quieter operation. It feeds the motor more steadily at low speeds.
Which fans can it be used with?
It can be used with compatible models such as bathroom, duct, and roof fans.