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.webp "Fan speed controller 400 Volt")
EU declaration conformity
400 V transformer fan speed controller | TK monitoring | 8 A
Product description
Transformer fan speed controller for 400 V motors with thermal contacts. The maximum motor current is 8 A.
The fan speed can be adjusted via an integrated rotary switch on the front cover. The TK monitoring function stops the motor in case of overheating.
The fan speed can be adjusted in five steps by reducing the motor voltage. The output voltage is fully sinusoidal and guarantees quiet operation of the motor.
The housing can be surface mounted and has protection class IP54 against ingress of dirt, dust and moisture.
The supply voltage is 400 V.
Additional specifications and description
The STRS4-80L40 is designed to provide multiple speed options for controlling 400 VAC, three-phase fan motors using an autotransformer, which allows for the adjustment of the voltage supplied to the motor, which in turn affects the rotational speed of the motor and thus the fan speed. The autotransformer has multiple taps along the primary winding, which provide different voltage levels corresponding to various fan speed settings, in this case the output voltages are: 130, 180, 230, 300 and 400 V.
The built-in switch allows you to choose between the 5 predefined speeds. This implemented technology is incredibly dependable and durable and the motor operates exceptionally quietly and has a longer lifespan. The autotransformers' electrical noise is decreased by a special impregnated coating.
Connections
To ensure proper connections and safe operation, you must adhere to specific rules when wiring a three-phase fan motor.
Identifying the motor leads is the first step. Three-phase motors typically have six leads with the letters U, V, and W denoting the three phases. These serve as the motor's outputs, and the R, S, and T terminals serve to power the controller itself.
To find out the motor voltage rating, look at the nameplate or specifications. It is crucial to match the power supply voltage to the motor voltage.
You need to wire the motor in either a delta (Δ) or a wye/star (Y) configuration, depending on the motor voltage and the available power supply. The recommended wiring configuration for the particular motor model should be stated on the motor nameplate or in the manufacturer's documentation. Observe the grounding regulations outlined by the regional electrical codes. Three-phase motors typically need to be grounded for safety reasons.
Extras
The controller features motor TK monitoring, i.e. thermocouple (TK) or thermal motor contacts, which measure the temperature in the motor windings. The TK monitoring function will shut off the motor in cases of motor overheating to avoid motor damage. To simulate normal motor temperature if the motor does not have TK contacts, the controller's two TK terminals must be bridged.
Also, the STRS4 series features an extra unregulated output. When the motor is enabled, the additional, unregulated output (1 phase, 230 VAC) is turned on. It can be used to operate a damper, an external run-indicator, etc. For instance, the damper closes when the fan is turned off. The damper is open when the fan is running.
Installation requirements
To ensure proper functionality and safety, it is crucial to adhere to specific installation instructions and guidelines when mounting the fan speed controller on a wall or panel.
Select a stable and secure mounting surface that can hold the controller's weight. Make sure the surface is level and devoid of any obstructions or protrusions that might hinder the controller's installation or use.
Place the controller vertically on the wall. Make sure the area around the controller has enough ventilation. To avoid overheating and guarantee ideal cooling, leave enough space around the controller for airflow, particularly on the sides and top. Install the controller in a location where the ambient temperature is within a reasonable range. Avoid too warm areas, such as spots that are close to heat sources or that are in direct sunlight, as these can have a negative impact on the controller functionality and lifespan. Observe the wiring instructions for the controller. Make sure the wiring is securely fastened and shielded to avoid damage or unintended contact.
Take into account any particular environmental factors, such as exposure to moisture, dust, or corrosive materials, that may affect the controller's performance. Use suitable enclosures or covers, if necessary, to further secure the controller's safety. Install the controller in a spot that's simple to reach for servicing, checking, and making adjustments as necessary. In order to access the switches, terminals, etc., make sure there is enough space around the controller.
Enclosure
The metal enclosure of the STRS4-80L40 has a paint coating that resists external mechanical impacts. The IP54 ingress protection rating ensures that the enclosures are built to offer a high level of protection against dust and water ingress, that they are successfully sealed against dust particles, and that they can withstand water splashes from all directions, making them suitable for moderately harsh environments.
The built-in switch allows you to choose between the 5 predefined speeds. This implemented technology is incredibly dependable and durable and the motor operates exceptionally quietly and has a longer lifespan. The autotransformers' electrical noise is decreased by a special impregnated coating.
Connections
To ensure proper connections and safe operation, you must adhere to specific rules when wiring a three-phase fan motor.
Identifying the motor leads is the first step. Three-phase motors typically have six leads with the letters U, V, and W denoting the three phases. These serve as the motor's outputs, and the R, S, and T terminals serve to power the controller itself.
To find out the motor voltage rating, look at the nameplate or specifications. It is crucial to match the power supply voltage to the motor voltage.
You need to wire the motor in either a delta (Δ) or a wye/star (Y) configuration, depending on the motor voltage and the available power supply. The recommended wiring configuration for the particular motor model should be stated on the motor nameplate or in the manufacturer's documentation. Observe the grounding regulations outlined by the regional electrical codes. Three-phase motors typically need to be grounded for safety reasons.
Extras
The controller features motor TK monitoring, i.e. thermocouple (TK) or thermal motor contacts, which measure the temperature in the motor windings. The TK monitoring function will shut off the motor in cases of motor overheating to avoid motor damage. To simulate normal motor temperature if the motor does not have TK contacts, the controller's two TK terminals must be bridged.
Also, the STRS4 series features an extra unregulated output. When the motor is enabled, the additional, unregulated output (1 phase, 230 VAC) is turned on. It can be used to operate a damper, an external run-indicator, etc. For instance, the damper closes when the fan is turned off. The damper is open when the fan is running.
Installation requirements
To ensure proper functionality and safety, it is crucial to adhere to specific installation instructions and guidelines when mounting the fan speed controller on a wall or panel.
Select a stable and secure mounting surface that can hold the controller's weight. Make sure the surface is level and devoid of any obstructions or protrusions that might hinder the controller's installation or use.
Place the controller vertically on the wall. Make sure the area around the controller has enough ventilation. To avoid overheating and guarantee ideal cooling, leave enough space around the controller for airflow, particularly on the sides and top. Install the controller in a location where the ambient temperature is within a reasonable range. Avoid too warm areas, such as spots that are close to heat sources or that are in direct sunlight, as these can have a negative impact on the controller functionality and lifespan. Observe the wiring instructions for the controller. Make sure the wiring is securely fastened and shielded to avoid damage or unintended contact.
Take into account any particular environmental factors, such as exposure to moisture, dust, or corrosive materials, that may affect the controller's performance. Use suitable enclosures or covers, if necessary, to further secure the controller's safety. Install the controller in a spot that's simple to reach for servicing, checking, and making adjustments as necessary. In order to access the switches, terminals, etc., make sure there is enough space around the controller.
Enclosure
The metal enclosure of the STRS4-80L40 has a paint coating that resists external mechanical impacts. The IP54 ingress protection rating ensures that the enclosures are built to offer a high level of protection against dust and water ingress, that they are successfully sealed against dust particles, and that they can withstand water splashes from all directions, making them suitable for moderately harsh environments.
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