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    75 kVA 3-Phase Autotransformer, 380V to 220/200V

    3-phase autotransformer uses copper or aluminum winding, rated capacity 75 kVA, steps down the primary voltage 380V to secondary 220/200V, frequency 50/60 Hz, self-cooling or wind-cooled. Winding of the dry type auto-transformer has ≥98% high efficiency, other input/output voltages are customizable.
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    Delivery date: 6-12 days

    Affordable price 75 kVA dry type autotransformer for sale, three phase, which has 380 volt input voltage and 220/200 volt output voltage, primary and secondary windings are isolated separately. The step down auto-transformer has copper or aluminum wires for selection, cooling mode is self-cooled or wind-cooled.

    Applications: The 3-phase autotransformer can be used in CNC production equipment, SMT, printing machines, electrical discharge machines, automatic plug-in machines, precision measuring equipment, laser cutting machines, plastic molding machines, medical monitoring systems, PCB drilling machines, laboratory equipment, military use Instrumentation control center, etc.


    Model ATO-ASG75KVA
    Phase 3-Phase
    Capacity 75 kVA
    Input Voltage AC 380V
    Input Current 114A
    Output Voltage (Optional) AC 220V, 200V
    Output Current 197A (220V), 217A (200V)
    Frequency 50Hz / 60Hz
    Winding Material (Optional) Aluminum Wire, Copper Wire
    Cooling Method Self-Cooling or Wind-Cooling
    Working Efficiency ≥98%
    Protection Grade IP21
    Waveform Distortion No distortion (compared with output wave)
    Insulation Resistance ≥ 150MΩ
    Wiring Yn0
    Electrical Strength Power frequency sinusoidal voltage 3000V lasts for 1 minute, no breakdown and flicker
    Overload Protection Can withstand instantaneous 2 times the rated current
    Moisture-Proof Type (Optional) Open type, sealed type
    Ambient Temperature -20℃ ~ +45℃
    Altitude ≤ 2500m
    Relative Humidity 0-95%
    Noise ≤35dB (within 1 meter)
    Design Service Life 20 years
    Use Environment No explosion, rain and snow corrosion place, and no gas and conductive dust in the medium that can corrode metal and damage insulation
    Weight (Enclosure Included) 350 kg
    Dimension 600*550*750 mm


    • 3-phase autotransformer has enough power, the wiring is tight and neat, and does not skip turns. Coils adopt insulated H-class enameled wire, with low no-load current and low loss.
    • The 75 kVA dry-type autotransformer has built-in silicon steel sheet, which has good magnetic flux performance, high heat dissipation coefficient and low magnetic loss.
    • The autotransformer uses electrophoresis technology clamps, no burrs on the edges, rounded corners to prevent collisions, and not easy to corrode.
    • Tinned copper tube terminals and rail-type wiring ports are convenient for wiring and ensure that the power-on overload capacity is increased to the extreme.


    75 KVA 3-Phase Autotransformer Details

    75 kVA 3-Phase Autotransformer Schematic Wiring Diagram

    3-Phase Autotransformer Schematic Wiring Diagram

    Tips: Precautions for using 75 kVA 3-phase autotransformer.

    1. The electrical performance debugging is conducted based on the national standards and the ANSI standards. The TRUE RMS voltmeter is used for debugging.
    2. Do not open the chassis by yourself, otherwise we will not provide the free warranty.
    3. 75 kVA 3-phase autotransformer manufactured by manufacturer, within the rated power range, can be applied to any AC electrical equipment.
    4. The 75 kVA 3-phase autotransformer has a certain amount of heating during application, which would be a normal phenomenon. However, the installing environment must be well ventilated and clean, in particular, the ventilation holes must not be blocked. In the event of abnormal conditions occur during use, the mains supply and main switch of 3-phase autotransformer must be shut down immediately.
    5. Power off the switching power supply of 75 kVA 3-phase autotransformer when it is not used for a long time. Keep it clean. When it is used later, the professional is required to check the stains deposited on the coils, terminals, etc.
    6. Installation and use of the 75 kVA 3-phase autotransformer shall be made by following strictly the manual.
    7. Please keep the user manual properly for future reference.
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