5-level Step Transformer Sentera STR 1.5 A

Description

Five-step fan speed control without rewiring the controller

The Sentera STR 1.5 A 5-step transformer (pre-wired) is a manual speed controller for single-phase, voltage-controllable AC motors. It is particularly useful for extractor fans, allowing you to match ventilation performance to current requirements using five fixed settings. This Growmart version comes with the mains cable and power strip already connected, removing the need to wire these components to the controller yourself.

Five fixed settings for smooth motor operation

The Sentera STR adjusts motor speed by changing the output voltage through an autotransformer. Five speed settings can be selected using the rotary switch, along with a separate OFF position. Transformer control provides a sinusoidal output voltage, helping compatible motors operate smoothly and quietly. This makes it a useful alternative where the additional motor buzz sometimes associated with simple electronic dimmers is undesirable.

Pre-wired for straightforward installation

The mains lead and power strip are already connected on this version, so the controller does not need to be wired for standard plug-in use before installation. The connected motor must still be suitable for voltage control. You can find suitable options among Growmart’s AC duct fans. One practical example is the S&P TD500/150-160 Silent duct fan.

Up to 1.5 A combined load for ventilation systems

The controller supports a maximum combined motor current of 1.5 A. Always check the rated current of the fan, or the combined current when operating more than one suitable motor, before connection. Further grow room ventilation components can be used to complete an extraction system. The Sentera STR is intended for indoor use only.

Technical details:

• Product type: Pre-wired 5-step transformer fan speed controller
• Base model: Sentera STR-1-15L22
• Application: Voltage-controllable single-phase AC motors, particularly fans and pumps
• Supply voltage: 230 V AC
• Frequency: 50–60 Hz
• Maximum rated current: 1.5 A combined
• Control: 5 manual settings plus OFF position
• Status indication: LED
• Enclosure: R-ABS plastic, UL94-V0, grey RAL 7035
• Controller enclosure protection: IP54 according to EN 60529
• Controller enclosure dimensions: 115 × 205 × 100 mm
• Ambient temperature: -20–35 °C
• Relative humidity: 5–95%, non-condensing
• Installation environment: Indoor use
• Scope of delivery: Pre-wired Sentera STR 1.5 A with connected mains cable and power strip

Bedienungs- und Montageanleitung

Bedienungs- und Montageanleitung

Sold and shipped by Growmart (Hamburg, Germany), which delivers across Europe with DHL. Prices are set by the vendor and you complete your purchase on their site.