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Transformer fan speed controllers

5-step fan speed control for AC voltage controllable motors. Fan speed controllers with autotransformers provide a simple, yet robust solution to control the speed of AC voltage controllable motors in steps. The AC motor can be controlled in 5 steps, manually or demand based. Transformer fan speed controllers are available for single phase 230 VAC or three phase 400 VAC voltage controllable motors. Some series feature auto restart after power failure.

230 VAC
230 VAC
Regulate the rotational speed of single-phase voltage controllable motors by varying the output voltage in steps. The used technology provides a regulated output voltage with a perfect sinusoidal shape, guaranteeing a quiet motor operation. The controllers up to 7,5 A feature a plastic enclosure, the other models feature a metal enclosure.
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3x 230 VAC
3x 230 VAC
Regulate the rotational fan speed of three-phase 230 VAC voltage controllable motors by varying the output voltage. They are equipped with autotransformers and control the speed manually in 5 steps. The used technology provides a regulated output voltage with a perfect sinusoidal shape, guaranteeing a quiet motor operation. All models feature a metal enclosure.
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3x 400 VAC
3x 400 VAC
Regulate the rotational fan speed of three-phase 400 VAC voltage controllable motors by varying the output voltage. They are equipped with autotransformers and control the speed manually in 5 steps. The used technology provides a regulated output voltage with a perfect sinusoidal shape, guaranteeing a quiet motor operation. All models feature a metal enclosure.
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