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Transformer fan speed controllers

Reliable and simple 5-step control for AC fans with voltage controllable motor. The generated motor voltage has a perfect sinusoidal shape. This results in exceptionally quiet motor operation and extended service life. These fan speed controllers do not require configuration. Once connected, they are ready to use! Discover the complete range of Sentera transformer fan speed controllers here.
Transformer fan speed controllers

5-step fan speed control
Transformer speed controllers are also called 5-step speed controllers. They regulate motor speed in steps. These type of fan speed controllers are easy to install. They don’t require any configuration. Some transformer fan speed controllers have a built-in rotary switch to manually adjust the fan speed. Other variants can be controlled remotely via Modbus RTU communication or via an analogue (0-10 Volt) control signal. Transformer fan speed controllers are cost efficient and have proven to be very reliable and robust.

Autotransformer technology
Autotransformers are electrical transformers with a single coil. Via their different voltage taps, reduced voltages are made available. One of these voltages is connected to the motor. Thanks to this technology, they generate a motor voltage with a perfect sinusoidal shape. This results in exceptionally quiet motor operation and extended service life. A special impregnated coating reduces the electrical noise from the autotransformers. However, in quiet environments the typical humming noise caused by the transformer technology might be noticeable.

Monitor motor temperature
Transformer speed controllers are available for single phase motors with a maximum current of 20 A and for three phase motors (3ph 230 Volt or 3ph 400 Volt) with a maximum current of 14 A. Some versions offer the 'TK monitoring' function to monitor the temperature of the motor. This functionality deactivates the motor in case of overheating to prevent motor damage. At the same time, the alarm output will be enabled to indicate a motor problem. In case your motor is not equipped with TK contacts, don’t forget to bridge the TK terminals of the fan speed controller or to deactivate the TK monitoring function.




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