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  • New item   -52.74€Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22
    New item   -52.74€Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22 1
    New item   -52.74€Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22 2
    New item   -52.74€Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22 3
    New item   -52.74€Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22 4

    Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22

    Code: RTR-1-15L22
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  • Product description

    Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22

    RTR-1-15L22 – Sentera Controls transformer fan speed controller with remote control for single-phase AC motors up to 1.5 A. The controller itself is installed in a technical area, and the speed is switched by an external 5-position switch (e.g. Sentera SMT-1-30-4C) or a thermostat. Sinusoidal output voltage: 0-(80)-110-140-170-190-230 VAC.

    Key idea:
    The heavy transformer goes into a plant room or above the ceiling, while only a compact switch is installed in the room. This way the user controls ventilation from a convenient location, and the motor runs quietly. RTR-1-15L22 is intended for smaller duct or axial fans (up to 1.5 A).
    What it is for RTR-1-15L22:
    This model is designed for low-power fans (up to 1.5 A) – one or two duct or axial fans in an office, bathroom, kitchen or small room.
    Max. motor current
    1.5 A
    Control
    External 5-position switch / thermostat
    Output steps
    0-(80)-110-140-170-190-230 VAC
    Protection
    IP54, surface mounting

    Operating principle

    The 230 VAC supply (L, N, PE), the motor to the regulated output (U, N) and an external switch are connected: the common contact – to terminal P, the positions – to terminals 1–5. The transformer taps are brought out directly to the terminal strip. The unregulated L1 output (230 VAC, 2 A) is intended for a damper or auxiliary device.

    Inside is an autotransformer with several output taps. Each step supplies the motor with a different preset voltage: 0-(80)-110-140-170-190-230 VAC. Control is stepped, not stepless – speed changes in fixed increments. In external switch positions 1–5 the output is 110, 140, 170, 190 and 230 VAC; in position 0 the motor and L1 are switched off. The 80 V tap is present but not connected; other voltages can be selected by changing the wiring.

    A thermostat can be used instead of the switch – the fan is then switched according to temperature. The controller has no knob of its own: the speed is always selected by an external device.

    The output voltage is sinusoidal because it is obtained by a transformer rather than by electronically “chopping” the sine wave. Therefore the motor runs quietly, heats up less and does not hum – the transformer speed controller is also suitable for AC motors that audibly hum at low speed with an electronic (triac) controller. Engineer's note: the speed of an AC asynchronous motor is reduced by increasing slip, so less energy is saved than with an EC fan or frequency inverter. The greatest advantage of transformer control is quiet and reliable motor operation at all steps.

    Benefits RTR-1-15L22?
    The power section is separated from the control point: only a compact switch remains in the room, while the transformer is installed where there is space for it.

    Technical specifications

    Product type Transformer fan speed controller with remote control
    Manufacturer / code Sentera Controls / RTR-1-15L22
    Series RTR-1 (1.5 / 2.5 / 3.5 / 5 / 7.5 A)
    Supply voltage 230 VAC, 50–60 Hz
    Max. motor current 1.5 A
    Regulated output (U, N) 0-(80)-110-140-170-190-230 VAC, sinusoidal voltage; version L22
    Unregulated output (L1) 230 VAC, 2 A (off in position 0)
    Control External 5-position switch (e.g. Sentera SMT-1-30-4C) or thermostat; terminals P and 1–5
    Fuse T-3.15 A-H, 5×20 mm
    Housing ABS plastic, UL94-V0, grey RAL 7035
    Protection class IP54 (EN 60529), for indoor use only
    Operating environment -20…+35 °C, 5–95 % rH non-condensing
    Dimensions A / B / C / D / E 170 / 255 / 140 / 155 / 194 mm (according to the datasheet drawing)
    Weight 2.00 kg net / 2.18 kg gross
    Packaging dimensions 262×180×160 mm
    Compliance LVD 2014/35/EU, EMC 2014/30/EU (EN 61326), RoHS 2011/65/EU, WEEE 2012/19/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

    Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

    Main functions

    • Remote speed switching – the external 5-position switch can be in the room, while the controller is in a technical area.
    • Thermostat control – a thermostat instead of the switch, switching the fan according to temperature.
    • Sinusoidal output voltage – quiet motor operation at all steps.
    • Unregulated L1 output (2 A) – for a damper actuator or other device.
    • Step voltages can be changed – another tap can be selected by changing the wiring.

    Where is it used?

    • Offices, classrooms, halls – when the switch must be in the room
    • Restaurants, cafés, retail premises
    • Ventilation with the controller in a plant room or above a suspended ceiling
    • Rooms controlled according to temperature (by thermostat)
    • Farm and production buildings

    On-demand operation

    For the designer.
    Power unit and control point are separated – more flexible planning.
    For the electrician.
    Clear terminal strip: P, 1–5, U, N, L1, PE.
    For the user.
    Only a compact switch in the room, the fan runs quietly.

    Application guide: how it is used in practice

    Typical RTR-1-15L22 applications:

    Site What is connected Result Installer's note
    Office or classroom SMT-1-30-4C switch in the room → P, 1–5 Speed is switched from the room Controller in a technical room
    Room controlled according to temperature Thermostat → P and the selected step The fan is switched on or switched over according to temperature Select a thermostat with suitable contacts
    Restaurant or café extraction Fan → U, N; damper → L1 Quiet operation and damper together with the fan L1 load – up to 2 A
    Several fans In parallel → U, N Controlled by a single switch Total rated current ≤ 1.5 A

    How to select the controller current

    Rated current of the motor(s) Recommended model
    up to 1.5 A RTR-1-15L22 (1.5 A) ← this model
    1.5–2.5 A RTR-1-25L22 (2.5 A)
    2.5–3.5 A RTR-1-35L22 (3.5 A)
    3.5–5 A RTR-1-50L22 (5 A)
    5–7.5 A RTR-1-75L22 (7.5 A)
    Rule: controller max. current ≥ motor rated current (see the motor nameplate). When connecting several fans – motors of the same type – add up their rated currents.
    When to choose another solution: a knob on the controller itself needed – STR-1; control by a 0-10 VDC signal – STVS1; Modbus RTU – RTVS8; TK and automatic restart – STRA1; autotransformer only for a control panel – ATR-1; stepless electronic control – EVS-1; for a three-phase motor – STR-4.

    Pros

    • Sinusoidal output voltage – quiet motor operation
    • Remote speed switching with an external switch
    • Thermostat control possible
    • Unregulated L1 output (2 A)
    • IP54 enclosure

    Cons / limitations

    • Step control, not stepless
    • Has no knob of its own – an external switch or thermostat is required
    • Higher weight than electronic controllers (2.00 kg net)
    • No TK protection, 0-10 VDC input or Modbus
    • Single-phase AC motors only; not suitable for EC fans

    Safety and installation notes

    • Installation and connection must be carried out by a qualified electrician with the power disconnected.
    • Always connect the protective earth (PE).
    • The rated current of the motor (or the total of several motors) must not exceed 1.5 A; replace the fuse only with one of the same type and rating.
    • The controller is intended only for single-phase, voltage-controllable AC motors; it is not suitable for EC fans or three-phase motors.
    • The external switch circuit carries mains voltage – use a switch and cable rated for 230 VAC.
    • For indoor use only (-20…+35 °C).

    Quick selection guide

    1.5 A
    230 VAC
    Remote switch
    Sinusoidal voltage
    IP54
    Suitable when you need:
    • quiet stepped AC fan control up to 1.5 A;
    • where the switch has to be in the room and the controller in a technical area;
    • thermostat control.
    Check before use:
    • the motor rated current;
    • an external switch (e.g. SMT-1-30-4C) or thermostat and the cable to it;
    • whether the step voltages 0-(80)-110-140-170-190-230 VAC are suitable.
    Important reminder: RTR-1-15L22 does not switch speed without an external switch or thermostat; it does not control EC fans or three-phase motors.

    FAQ

    Does the controller have a knob?
    No, the speed is selected with an external 5-position switch (e.g. Sentera SMT-1-30-4C) or a thermostat.
    How do I connect the switch?
    The common contact – to terminal P, the positions – to terminals 1–5.
    Can it be controlled by a thermostat?
    Yes, the datasheet states that the switch can be replaced by a thermostat.
    How does it differ from STR-1?
    STR-1 has a knob on the enclosure, while RTR-1 is controlled by a remote switch.
    Can several fans be connected?
    Yes, provided their total rated current does not exceed 1.5 A.

    Transformer fan motor speed controller with remote control | 1.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | RTR-1-15L22

    Sentera RTR-1-15L22 – transformer fan speed controller with remote control up to 1.5 A, 230 VAC, 5 steps, external switch SMT-1-30-4C or thermostat, sinusoidal voltage, IP54.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.
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