Adjustable and constant voltage supplies

REOLAB AC and DC high voltage power supplies, three-phase supplies and laboratory equipment

REO power supplies and free from electro-magnetic interference and comply with the valid EC Guidelines (EN 61558-2-14 and the older VDE Standard 0552).

REO test devices are used in test facilities, development laboratories, institutes, schools and universities as well as in industry and in all mobile stations. A clean and sinusoidal current is essential for the reproducibility of the tests. Among other products, REO provides AC and DC power supplies, high-voltage power feeders and three-phase supply units that are designed for voltages up to 15 kV and currents up to 30 KA.

  • REOLAB 320

    REO three-phase AC - High voltage supply galvanically isolated from mains

    REOLAB 320


    For endurance tests up to 5 kV, the high-voltage supply with galvanic isolation provides the entire power supply for test fields of quality assurance.


    •     Circuit breaker with magnetic and thermal tripping in the mains input

    •     Main contactor for switching the transformers in operation

    •     Emergency stop button and safety loop with warning lamps

    •     Timer for the main contactor

    •     Pushbuttons and indicators

    •     10-speed setpoint potentiometer for voltage adjustment

    •     Protection against short-circuit and overload of the output

    •     Digital measuring instruments V + A 96 x 48 mm in AC output

    •     Electronic control of all three phases for voltage stabilization

    •     Mobile electronic housing

  • REOLAB 330

    REO Three-phase supply with separate winding

    REOLAB 330
    • Output Current: 12 - 63 A


    This is the ideal answer for every laboratory requiring a galvanic separation for manual or automatic voltage adjustment.


    • Power switch with magnetic and thermal cut-out

    • Main contactor for operational switching of transformers

    • Secondary contactor On/Off

    • Emergency switch

    • Pushbutton and indicator lamp for operation

    • Outputs protected against short-circuit and overload

    • Analog meters for V & A in the output

    • Electronically-controlled voltage stabilization

    • Forced zero-position for the variable transformer

    • Mains supply via CEE plug and approx. 3 m flexible lead

    • Outputs via laboratory safety sockets and CEE socket

    • 19-inch rack-mount units with aluminium front panels

    • Fixed & swivel castor wheels for mobility

  • REOLAB 340

    REO-AC Three-phase laboratory unit for motor testing

    REOLAB 340
    • Input voltage: 3x400 V
    • Output voltage: 3x400 - 700 V
    • Output Current: 3x400 A

    Applications: The AC laboratory unit is used in every motor testing shop or laboratory for checking and development purposes.


    • Power switch with magnetic and thermal cut-out in the input circuit

    • Main contactor with inrush current limiting

    • PLC controlled

    • 640 x 480 colour LCD display

    • Voltage, current, power factor, apparent power, reactive power and active power of all three phases can be displayed

    • Phase sequence relay for the rotating field

    • Output protected against short-circuit and overload

    • Min/Max pushbutton for output voltage adjustment

    • Output voltage stabilization in control mode

  • REOLAB 370

    REO three-phase laboratory power supply for continuously variable voltage with electronic control

    REOLAB 370
    • Input voltage: 3x400 V
    • Output voltage: 3x0 - 520 V
    • Output Current: 3x10 A


    The AC laboratory power supply is required in every test bay, laboratory or quality assurance department for test and development purposes. The device under test can be operated with a variable supply, thus permitting overvoltage and undervoltage tests to be conducted, as well as endurance tests.

    The output voltage is kept constant to within ±1 % by the REO duty-cycle controller TVR 6500.

  • REOLAB 420

    REO DC High voltage supply unit

    REOLAB 420
    • Output voltage: 2400 - 7650 V
    • Output Current: 20 - 50 A

    REO develops and manufactures with the series REOLAB 420 the ideal test system for the DC supply of railway or wind converters for higher power ratings.
    The REOLAB 420 test system is designed according to the machinery directive ; railway and and wind converters up to 600kW can be tested and documented via the REO Powerformer .

    For the series REOLAB 420 we supply electrical or compressed air operated switches. The grounding circuits are constructed in such way that the capacitor in the intermediate circuit is switched off.

    On request we will send you the exact operating instructions and technical description - or you can make an appointment with our technical engineer!


    Options :

    • AC output

    • UPS for emergency stop operation

    • Compressed air short-circuit mechanism

    • Forced air cooling ( water cooling )

    • Risk assessment

  • REOLAB 423

    High voltage supply with AC-Output

    REOLAB 423
    • Input voltage: 3x400 V
    • Rated power: 0 - 150 kW/kVA


    The high-voltage supply unit is intended for testing current converters in the energy sector, as well as testing the entire auxiliary converters and switched power supply systems used in railway installations.


    • Conforms to: VDE 0552

    • Test voltage 3 kV for primary circuit

    • Protection IP 20

    • Ambient temperature: 40 °C


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