Variable transformer

REO variable transformers – a constant sinusoidal wave form in every application

A variable transformer is used if it is essential that output voltages are adjusted with a constant sinusoidal wave form.

The REO variable transformers create no interference or harmonics and are therefore particularly suited for use in test facilities or research institutes, where high frequency interference could falsify the results.

  • DRTE

    Three-phase variable column-type transformers (auto windings, IP 00)

    DRTE
    • Input voltage: 400 V
    • Output voltage: 400 V
    • Output Current: 8,7 - 208 A

    The REO column-type variable transformers complement the REOVAR series for currents up to 1000A with a fine-step adjustment of the output voltage at a constant current at the output.


    The waveform of the sine wave is preserved - like that,  EMC problems cannot occur over the entire operating range of 0 - 1000A. All products in the series come with UL - listed materials .


    The REO construction enables easy handling of the carbon rolls and the spindle - the copper-bevel gear allows a hysteresis-free adjustment of the output voltage even at high adjustment speed of the drive motor. Thus REO variable column transformers are perfect for high performance adjustment .


    REO-column type variable transformers conform to EN 61558-2-14


     

  • DRTEU

    Three-phase variable column-type transformers (auto windings, double-brush system)

    DRTEU
    • Input voltage: 400 V
    • Output voltage: 400 V
    • Output Current: 8,7 - 208 A

    REO columns variable transformers with double brush system together with REO transformers are the perfect solution - the double performance is possible .


    The waveform of the sine wave is preserved - like that,  EMC problems cannot occur over the entire operating range of 0 - 1000A. 
    All products in the series come with UL - listed materials .


    The REO construction enables easy handling of the carbon rolls and the spindle - the copper-bevel gear allows a hysteresis-free adjustment of the output voltage even at high adjustment speed of the drive motor. Thus REO variable column transformers are perfect for high performance adjustment .


    REO-column type variable transformers conform to EN 61558-2-14


     

  • NLR 7000

    Control Unit for Motorised Variable Transformers

    NLR 7000
    • Input voltage: 230/3x400 V
    • Frequency range: 50-60 Hz

    Control unit for a motor -driven variable transformers


    The REO controller NLR 7000 is used for constant adjustment of  voltage or power at variable transformers .
    The REO controllers NLR 7000.1 -3 is an electronic controller with following control options - all combined in one controller :



    • NLR 7000. 1 = Variable AC control

    • NLR 7000. 2 = variable DC control

    • NLR 7000. 3 = constant voltage + _ 10-30 %


    The control electronics of the NLR 7000 controls therefor  the three-phase motor of the variable transformer. By programming, various applications are possible. The parameters are set via the LED display - also available with remote control .



    • Protection: IP20

    • Operating temperature: 0 ... + 45 ° C

    • Storage temperature: -10 ... + 80 ° C

    • Rel . Humidity: 80 % without condensation

    • Pollution degree : 2

    • Altitude : 1000 m 0.5 % nominal current reduction for each additional 100 m

  • REOLINE Plus DC-S/A

    REOLINE Laboratory Power Supplies (analog, auto-windings)

    REOLINE Plus DC-S/A
    • Nominal Voltage: 230 V
    • Output Current: 0,60 - 8 A
    • Output voltage: 0 - 200 V
    • Output power: 120 - 1600 W

    This portable power supply is a single-phase direct current supply unit with analog display, auto-windings and continuously adjustable output voltage of 0 ... 200 VDC.
    The absolute zero position causes the zero voltage state.


    Applications:



    • Laboratory

    • Test field

    • Factory and service applications

  • REOVAR DRRTO/DRRTOSpW

    Three-phase toriodal variable transformers (auto windings, open, IP 00)

    REOVAR DRRTO/DRRTOSpW
    • Input voltage: 3 x 400 V
    • Output voltage: 3 x 0 - 400 / 3 x 0 - 450 V
    • Output Current: 3 x 1 - 3 x 32 A

    REOVAR toroidal transformers from the market leader for variable transformers regulate the output voltage in fine steps at constant current at the output. Our toroidal transformers are suitable for frequencies of 50 - 400 Hz - other frequencies on request.


    The particular advantage of this series is to maintain the sinusoidal shape - like that, EMC problems cannot occur. The special winding core of REO produces no stray fields and low voltage case.


     



    • Input voltage: 3 x 400V 50/60 Hz

    • Output voltage 3 x 0-400 V oder 0-450 V

    • Ambient temperature max. 40° C

    • Connection group IO


     


    REO toroidal variable transformers conform to EN 61558-2-14

  • REOVAR RRT/RRTW

    Single-phase toriodal variable transformers (auto windings, open, IP 00)

    REOVAR RRT/RRTW
    • Input voltage: 230 V
    • Output voltage: 0 - 230 V
    • Output Current: 1 - 32 A

    REOVAR toroidal transformers from the market leader for variable transformers regulate the output voltage in fine steps at constant current at the output. Our toroidal transformers are suitable for frequencies of 50 - 400 Hz - other frequencies on request.


    The particular advantage of this series is to maintain the sinusoidal shape - like that, EMC problems cannot occur. The special winding core of REO produces no stray fields and low voltage case .


    Type RRT/RRTW with an adjustable spindle to allow table or wall mounting. Sizes M4 - M61 have an optional center fixing nut.



    • Input voltage: 230 V 50/60 Hz

    • Output voltage 0-230 V oder 0-260 V

    • Ambient temperature max. 40° C

    • Connection group IO


     


    REO toroidal variable transformers conform to EN 61558-2-14

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