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EU declaration conformity
5-step fan speed controller | TK monitoring | 13 A
Product description
5-step transformer fan speed controller with thermal contacts or TK for single-phase motors. The maximum motor current (combined) is 13 A.
The fan speed can be adjusted using the rotary switch on the front cover. In the event of overheating, the TK monitoring function disables the motor.
The fan speed is controlled in five steps by lowering the motor voltage. The perfect sinusoidal shape of the output voltage ensures quiet motor operation.
The enclosure is surface mountable and provides IP54 protection against dirt, dust, and moisture ingress.
Additional specifications and description
The technology
Transformer-based fan speed control is a straightforward solution for controlling ventilation in industrial environments. This 5-step fan speed controller provides a convenient way to regulate extractor hoods or exhaust fans without the need for complex configuration or programming. It offers a quick and efficient method for adjusting the fan speed according to the specific requirements of the environment.
By offering five distinct speed settings, the controller allows users to increase the fan speed gradually or set it to the desired level directly. This flexibility can be beneficial in industrial environments, warehouses, where precise control over ventilation is necessary.
Additionally, the fact that the controller can be used immediately upon connection makes it convenient for installation and use. This saves time and effort, allowing users to start utilizing the fan speed control right away.
What is more, you can easily change the 5 output voltages by changing the internal wiring. The factory connected output voltages are 110, 140, 170, 190 and 230 VAC, however, the product version features 80 VAC, which can be connected by disconnecting any of the other 5 steps.
Motor speeds are selected via the built-in rotary switch – simple and reliable!
Rotary switch with built-in mechanical time delay
It is important to operate the rotary switch not too quickly. The switch has a built-in mechanical time delay. This is important to prevent internal sparking during shifting. It has a positive effect on the service life of the device. When the rotary switch is rotated from position faster than the built-in mechanical time delay, the device will remain internally at position 0 (OFF position).
Unregulated output
The unregulated output of the motor controller is a separate output that becomes active when the motor is enabled. It operates in a binary manner, meaning it is either ON (230 Volts) or OFF (0 Volts). This unregulated output typically has a maximum current rating of 2 A.
This unregulated output can be utilized for various purposes, such as:
- Run Indicator: The output can be connected to an external run indicator, such as a light, to visually indicate when the motor is active.
- Damper Control: The output can be used to control a damper. For example, when the motor is running, the damper blade opens to allow airflow, and when the motor stops, the damper closes to restrict airflow.
- External Relay: The output can be connected to an external relay, allowing the motor controller to switch or control other electrical devices or circuits.
TK monitoring
The STRS1 controller can monitor thermal motor contacts (TK or thermal contacts measure temperature in the motor windings). Thermal motor protection is a crucial feature in fan speed controllers, especially in industrial environments where motors can be subject to heavy use and potential overheating. This protection mechanism helps prevent motor damage and ensures safe and reliable operation.
Thermal motor protection typically works by monitoring the temperature of the motor during operation. If the temperature exceeds a safe threshold, the protection system activates and takes appropriate measures to prevent further temperature rise. These measures may include reducing the fan speed, triggering an alarm, or even shutting off the motor entirely.
By incorporating thermal motor protection into the fan speed controller, the risk of motor damage due to overheating is minimized. This helps prolong the motor's lifespan, ensures safe operation, and reduces the likelihood of equipment failure or downtime in industrial environments.
Surface mount metal enclosure
Enclosures play an important role in protecting the interior components or contents from various external factors such as debris, dust, water, and mechanical impact. The quality of enclosures is indeed essential to ensure the integrity and safety of the enclosed items.
The STRS1 features sheet steel enclosures designed to be resistant to external mechanical impacts. They can withstand accidental bumps, collisions, or other physical forces without compromising their structure or the items inside. This feature is particularly important in environments where there is a higher risk of such impacts, ensuring the protection of the enclosed components. The enclosures have a paint finish, which not only provides an aesthetic appeal but also serves as an extra layer of protection against corrosion and other environmental factors. The paint finish helps to enhance the durability and longevity of the enclosure. The EN 62208 certification ensures that the enclosures comply with the standards set for empty enclosures for low-voltage switchgear and control gear assemblies. The ingress protection rating of IP54 guarantees that the enclosures are designed to provide a high level of protection against dust and water ingress, they are effectively sealed against dust particles and can withstand water splashes from any direction, making them suitable for moderately harsh environments.
By offering five distinct speed settings, the controller allows users to increase the fan speed gradually or set it to the desired level directly. This flexibility can be beneficial in industrial environments, warehouses, where precise control over ventilation is necessary.
Additionally, the fact that the controller can be used immediately upon connection makes it convenient for installation and use. This saves time and effort, allowing users to start utilizing the fan speed control right away.
What is more, you can easily change the 5 output voltages by changing the internal wiring. The factory connected output voltages are 110, 140, 170, 190 and 230 VAC, however, the product version features 80 VAC, which can be connected by disconnecting any of the other 5 steps.
Motor speeds are selected via the built-in rotary switch – simple and reliable!
Rotary switch with built-in mechanical time delay
It is important to operate the rotary switch not too quickly. The switch has a built-in mechanical time delay. This is important to prevent internal sparking during shifting. It has a positive effect on the service life of the device. When the rotary switch is rotated from position faster than the built-in mechanical time delay, the device will remain internally at position 0 (OFF position).
Unregulated output
The unregulated output of the motor controller is a separate output that becomes active when the motor is enabled. It operates in a binary manner, meaning it is either ON (230 Volts) or OFF (0 Volts). This unregulated output typically has a maximum current rating of 2 A.
This unregulated output can be utilized for various purposes, such as:
- Run Indicator: The output can be connected to an external run indicator, such as a light, to visually indicate when the motor is active.
- Damper Control: The output can be used to control a damper. For example, when the motor is running, the damper blade opens to allow airflow, and when the motor stops, the damper closes to restrict airflow.
- External Relay: The output can be connected to an external relay, allowing the motor controller to switch or control other electrical devices or circuits.
TK monitoring
The STRS1 controller can monitor thermal motor contacts (TK or thermal contacts measure temperature in the motor windings). Thermal motor protection is a crucial feature in fan speed controllers, especially in industrial environments where motors can be subject to heavy use and potential overheating. This protection mechanism helps prevent motor damage and ensures safe and reliable operation.
Thermal motor protection typically works by monitoring the temperature of the motor during operation. If the temperature exceeds a safe threshold, the protection system activates and takes appropriate measures to prevent further temperature rise. These measures may include reducing the fan speed, triggering an alarm, or even shutting off the motor entirely.
By incorporating thermal motor protection into the fan speed controller, the risk of motor damage due to overheating is minimized. This helps prolong the motor's lifespan, ensures safe operation, and reduces the likelihood of equipment failure or downtime in industrial environments.
Surface mount metal enclosure
Enclosures play an important role in protecting the interior components or contents from various external factors such as debris, dust, water, and mechanical impact. The quality of enclosures is indeed essential to ensure the integrity and safety of the enclosed items.
The STRS1 features sheet steel enclosures designed to be resistant to external mechanical impacts. They can withstand accidental bumps, collisions, or other physical forces without compromising their structure or the items inside. This feature is particularly important in environments where there is a higher risk of such impacts, ensuring the protection of the enclosed components. The enclosures have a paint finish, which not only provides an aesthetic appeal but also serves as an extra layer of protection against corrosion and other environmental factors. The paint finish helps to enhance the durability and longevity of the enclosure. The EN 62208 certification ensures that the enclosures comply with the standards set for empty enclosures for low-voltage switchgear and control gear assemblies. The ingress protection rating of IP54 guarantees that the enclosures are designed to provide a high level of protection against dust and water ingress, they are effectively sealed against dust particles and can withstand water splashes from any direction, making them suitable for moderately harsh environments.
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