.webp "Transformer fan speed drive")
.webp "Fan speed controller")
.webp "5-step fan speed controller")
.webp "5-step speed controller")
.webp "AC fan speed controller")
.webp "5-step AC fan speed controller")
EU declaration conformity
Transformer fan speed controller 2,2 A | Low to high
Product description
Single-phase motor transformer fan speed controller. The maximum current (combined) is 2,2 Amps.
The rotary switch controls the AC fan speed, which ranges from low to high in 5 steps. There is also an OFF position on this rotary switch. The motor voltage is varied in 5 steps to control the motor speed. The perfect sinusoidal shape of the output voltage ensures quiet motor operation.
The enclosure provides IP54 protection against dirt, dust, and moisture ingress. It can be wall-mounted in indoor settings.
This 5-step speed controller is commonly used to control kitchen hood exhaust fans, ceiling fans, extraction fans, and other similar devices.
Additional specifications and description
Why choose a transformer fan speed controller
Most electric motors are voltage controllable. Transformer controllers are a simple, convenient and cost-effective speed control solution. Another major advantage of transformer-based control units is speed control without electromagnetic excitation in the motors. The products are therefore also recommended for noise-sensitive areas. So, what you get by a transformer fan speed controller is: silent motor operation, simple control in steps and a controller with a long service life at a reasonable price!
About the series
The 5-step speed control is specifically designed for single-phase HVAC fans or pumps. It employs a single-phase transformer to control the fan or pump speed by modifying the supply voltage in five predetermined steps. The transformer controller includes an extra unregulated output that allows for the operation of external equipment. The front of the unit features an LED indication that provide visual feedback on its current status. It is the most basic of all Sentera series of transformer-based fan speed controllers and therefore very popular amongst our customers.
Application
The series is designed specifically for control of AC fans by reducing the motor voltage. AC fans operate using alternating current and convert it into mechanical power. That is why STR-1 are compatible only with voltage controllable motors. It is possible to connect multiple motors to the controller, provided that the current limit is not exceeded. In such cases, all connected motors will operate at the same speed. If you are uncertain about the type of motor you have, it is strongly recommended to carefully review the accompanying documentation or contact the motor manufacturer for further assistance.
More than 5 regulated output voltages available
The rotary knob on the controller enclosure features five on positions plus an off position. Each position from 1 to 5 corresponds to a given step, i.e. output voltage. However, the series features a total of 6 output voltages but one of them – 80 VAC - is not the connected. Yet, it is possible to adjust the five steps via changing the internal wiring, which is totally optional.
Extra output
In addition to the regulated outputs, the STR-1 features an unregulated one. It is called so because it is either ON – 230 V or OFF – 0 V. You can use this output to control external devices (maximum current 2 A) such as a run indicator light or a damper. This means that while the fan is working, the run indicator will be on or the damper will be open; when its stops, the indicator will be off or the damper will close.
Solid enclosure
This fan speed controller can be installed on a wall or panel indoors. Make sure that the fan speed controller can sufficiently cool. Preferably install it in a cool place, best not in direct sunlight. In order to enhance the product reliability and service life, not only do we develop the electronics but we also manufacture our plastic enclosures. The primary purpose of an enclosure is to protect the electronics and prevent being contaminated or affected by external debris or environmental factors. The enclosure of the STR-1 is made of high-quality r-ABS VO (UL94) plastic, which is flame extinguishing, very tough and offers good protection against impacts. It offers an IP54 protection against ingress dust and water.
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