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Fan speed control - TK monitoring

STRS1 series are transformer fan speed controllers with TK monitoring. This function deactivates the motor in case of overheating. They control single-phase voltage controllable motors with a maximum current of 20 A. The AC fan speed is regulated by varying the maotor voltage in steps. The perfect sinusoidal shape of the motor voltage guarantees a quiet motor operation. The fan speed is selected via the 5-step rotary switch. This switch also has an OFF position. The enclosure allows surface mounting in indoor environments (IP54).
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