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Single-phase motor controls - 230 VAC


Transformer fan speed controllers for single-phase voltage controllable motors. They control AC fan speed by varying the motor voltage in steps. The controllers up to 7,5 A have a plastic enclosure, the other models have a metal enclosure.

Manual control for AC fans

Manual control for AC fans
Transformer fan speed controllers with rotary switch or remote control switch. They control the speed of single phase voltage controllable motors in steps. Some have a TK monitoring function for thermal motor protection. In case the motor gets overheated, the fan speed controller will stop the motor and activate the alarm output if available. The advanced fan speed controllers have a digital input, alarm output and unregulated output.
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Modbus RTU motor control

Modbus RTU motor control
RTVS1 transformer fan speed controllers are controlled via Modbus RTU communication. They can be connected to a BMS system or to a Sentera HVAC sensor. This allows you to control fan speed manually or demand based. RTVS1 series control single phase voltage controllable motors with a maximum current of 7,5 A. The fan speed is regulated in steps by varying the motor voltage. The enclosure allows surface mounting in indoor environments (IP54).
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Analogue input motor control

Analogue input motor control
STVS1 series are transformer fan speed controllers with analogue input. They control single-phase voltage controllable motors with a maximum current of 13 A. The fan speed is regulated by varying the motor voltage in steps. These 5 steps are selected via the analogue control signal (0-10 VDC). The TK monitoring function protect the motor against overheating. The enclosure allows surface mounting in indoor environments (IP54).
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Temperature based motor control

Temperature based motor control
These are transformer fan speed controllers with temperature input. They control the motor in function of the measured temperature. The temperature setpoint can be adjusted via the potentiometer. The fan speed can be manually selected via the rotary switch – 5 different speed selections. In automatic mode, fan speed is adjusted in function of the measured temperature. The controllers up to 7,5 A have a plastic enclosure. The controllers above 7,5 A have a metal enclosure.
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Motor control with day-week timer

Motor control with day-week timer
ST2R1 series are transformer fan speed controllers with day-week timer. They can switch between two optimal motor speeds. They control single phase voltage controllable motors with a maximum current of 13 A. The fan speed is regulated in steps by varying the motor voltage. The TK monitoring function protects the motor against overheating. After a power failure, the motor will automatically restart. The enclosure allows surface mounting in indoor environments (IP54).
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