Three Phase Autotransformer

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Model: Three Phase Autotransformer

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Three Phase Autotransformer has only one winding on each phase(or coil), one part of the winding acts as primary and another part is secondary.
Compared with isolation transformers, auto transformer features small size, high efficiency, large capacity, less energy loss and lower cost.

Three Phase Autotransformer is normally used in reduced voltage starting equipment, manual voltage regulators and three phase voltage stabilzers.


Input Voltage Three phase 380V/Three phase 220V or Customization Output Voltage Customization
Noise ≤50dB Temperature Raise ≤50℃(in -25-45℃ environment)
Cooling Air Cooling Winding Material Pure Copper
Insulation Grade F/H(can be customized) Efficiency ≥98%
Insulation Resistance ≥150MΩ Impedance Voltage ≤4%
Structure Vertical Service Life 30 years
Core Type EI Type Core Material Cold Rolled Silicon Steel Sheet
Altitude Requirement ≤2000M Output Voltage Accuracy ±1%
Overload Capacity 1.2 times of rated power Waveform Distortion Distortionless
Working Temperature -25-45℃ Working Humidity ≤95% Relative Humidity


Three Phase Autotransformer


Input Voltage

Three phase 380V/Three phase 220V or Customization

Output Voltage




Rated Power

500VA 1KVA 1.5KVA 2KVA 3KVA 5KVA 8KVA 10KVA 15KVA 20KVA 25KVA 30KVA 40KVA 50KVA 60KVA 100KVA 150KVA 200KVA 300KVA




Air cooling

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4. For any question, you can contact us directly.

Contact: Mr. John Gao

Whatsapp: +86-13618377608


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