400 V motor 1,5 A | day-night fan speed control | TK monitoring

This is a two-speed controller with thermal contacts (TK) for 400 V motors. The maximum motor current (combined) is 1.5 A. This controller has two distinct 5-step switches for selecting between two ideal fan speeds. When the motor is turned on, a dry contact input may be used to switch between the two speeds. In the event of overheating, the TK monitoring feature shuts the motor. The motor will automatically resume after a power outage. The alarm and unregulated outputs can be used to operate external devices in order to produce alerts or validate normal operation. The fan speed is controlled by lowering the motor voltage using autotransformers. This method produces an output voltage with a perfect sinusoidal form, ensuring silent motor running. The enclosure is surface mountable and provides IP54 protection against dirt, dust, and moisture entry.