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    Picture of 25 kVA Three Phase Autotransformer, 240V to 410V/480V
    Picture of 25 kVA Three Phase Autotransformer, 240V to 410V/480V
    Picture of 25 kVA Three Phase Autotransformer, 240V to 410V/480V
    Picture of 25 kVA Three Phase Autotransformer, 240V to 410V/480V

    25 kVA Three Phase Autotransformer, 240V to 410V/480V

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    SKU: PH-T-ASG25KVA
    $2,884.31
    ● 3-phase dry-type autotransformer, 25 kVA rated capacity, 98% high efficiency. ● Standard configuration: input 380V, output 220V/200V; other voltages available for customization. ● Supports multiple voltage configurations to suit diverse application requirements. ● Copper or aluminum wire winding is selectable. ● Compatible with 50Hz and 60Hz AC power supply systems.
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    Overview

    The 25 kVA dry-type three-phase autotransformer is engineered to provide efficient and reliable voltage conversion in AC power systems operating at 50Hz or 60Hz. With a flexible design supporting different voltage configurations such as 240V to 410V/480V, the unit can adapt to various industrial power requirements. The transformer adopts high-quality windings that can be manufactured using copper or aluminum conductors, allowing customers to balance performance and cost. Its dry-type construction ensures safe operation and simplified installation compared with oil-filled transformers. Thanks to its robust structure and efficient electromagnetic design, this industrial three-phase autotransformer is widely used as a voltage converter in manufacturing equipment, automation systems, and electrical distribution environments where stable three-phase power is required.

    25 kVA three-phase autotransformer feature

    Feature

    • Multi-Voltage Conversion: The 25 kVA three-phase autotransformer supports various voltage configurations. While the standard setup is 380V to 220V/200V step-down, the transformer can also be configured for 240V to 410V/480V applications, providing flexible voltage transformation for industrial power systems.
    • High-Efficiency Transformer Design: With an efficiency of up to 98%, this dry-type industrial autotransformer helps minimize energy loss during voltage conversion, ensuring reliable and cost-effective operation in three-phase power environments.
    • Corrosion-Resistant Structural Components: Electrophoresis-treated clamps feature smooth edges and rounded corners, improving safety while enhancing corrosion resistance and structural durability.
    • Convenient and Reliable Wiring Terminals: Equipped with tinned copper tube terminals and rail-type wiring ports, the transformer allows convenient electrical connections while maintaining strong conductivity and enhanced overload capability.
     

    Details

    1. Voltage Display Table
    2. Starting Indicator Light
    3. Wheel
    4. Handle
    5. Cooling Fan
    1 kVA three-phase autotransformer details

    25 kVA Three-phase Autotransformer Schematic Wiring Diagram

    Three-phase autotransformer schematic wiring diagram

    Specs
    Phase 3-Phase
    Capacity 25 kVA
    Input Voltage AC 380V
    Input Current 37A
    Output Voltage (Optional) AC 120V, 190V, 200V, 220V, 230V, 240V, 380V, 400V, 415V, 480V
    Output Current 65A (220V); 70A (200V)
    Frequency 50/60 Hz
    Winding Material (Optional) Aluminum Wire / Copper Wire
    Cooling Method Self-cooling / Wind-cooling
    Working Efficiency ā‰„98%
    Protection Grade IP21
    Waveform Distortion No distortion (compared with the output wave)
    Insulation Resistance ā‰„150MĪ©
    Wiring Yn0
    Electrical Strength Power frequency sinusoidal voltage 3000V lasts for 1 minute, no breakdown or flicker
    Overload Protection Can withstand instantaneous 2 times the rated current
    Moisture-proof Type (Optional) Open Type / Sealed Type
    Ambient Temperature -20ā„ƒ ~ +45ā„ƒ
    Altitude ā‰¤ 2500m
    Relative Humidity 0-95%
    Noise ā‰¤35dB (within 1 meter)
    Design Service Life 20 years
    Use Environment No explosion, rain, or snow corrosion place, and no gas or conductive dust in the medium that can corrode metal and damage insulation
    Dimension 550Ɨ500Ɨ600 (mm)
    Weight 85 kg
    Application
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    FAQ

    Q1: What voltage configurations are supported by this 25 kVA three-phase autotransformer?

    The standard configuration steps down a 3-phase 380V input to a 220V or 200V output, compatible with both 50Hz and 60Hz AC systems. Additional primary and secondary voltage combinations can be customized, making this dry-type autotransformer a flexible solution for diverse international industrial and commercial power supply requirements.

    Q2: What makes this 25 kVA autotransformer achieve 98% efficiency?

    The combination of H-class insulated enameled wire coils with low no-load current, a silicon steel sheet core with low magnetic loss, and tight skip-free winding all contribute to minimizing energy waste across the load range. Together, these design features enable this three-phase autotransformer to consistently achieve up to 98% conversion efficiency.

    Q3: What cooling and winding material options are available for this three-phase autotransformer?

    This 25 kVA dry-type autotransformer offers self-cooling or wind-cooled thermal management, and a choice of copper or aluminum wire windings ā€” allowing buyers to configure the unit to match their specific performance needs, installation environment, and budget considerations.

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