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    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down
    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down
    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down
    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down
    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down
    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down
    Picture of 5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down

    5 kVA Three Phase Isolation Transformer, 480V to 400V, Step Up/Down

    1 review(s) | Add your review
    SKU: PH-T-SG5KVA
    $1,776.92
    ● Three-phase isolation transformer, 5 kVA, for industrial power distribution. ● Reliable voltage conversion from 480V to 400V (step-up/down both directions supported). ● Aluminium or copper winding; open type or IP 24 enclosure; optional movable wheels. ● Non-ventilated structure for enhanced protection and durability. ● Compatible with 50Hz / 60Hz power systems worldwide.
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    ⏱️ Delivery: 10-16 days
    🔙 30-day Returns
    Overview

    Powerhome's 5 kVA 3-phase isolation transformer. With a standard configuration of 480V primary to 400V secondary — and a wide range of selectable voltages on both sides — it bridges common international voltage differences in industrial power distribution networks operating on 50 / 60 Hz. Its non-ventilated, dry-type construction makes it rated for use in hazardous locations and harsh industrial settings, including petrochemical plants, metro & rail transit infrastructure, manufacturing workshops, and commercial buildings where enclosed, maintenance-free operation is essential. 

    Specification

    Basics
    Phase 3-phase
    Capacity 5 kVA
    Weight-Aluminium Winding Open type: 55 kg
    Protected type: 70 kg
    Weight-Copper Winding Open type: 60 kg
    Protected type: 80 kg
    Technical Parameters
    Primary Voltage 480V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    Secondary Voltage 400V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    Frequency 50 / 60 Hz
    Winding Material Aluminium / Copper Wire (Optional)
    Work Efficiency ≥ 95%
    Insulation Resistance ≥ 50 MΩ
    Dielectric Strength 3000V AC / 1 min
    Noise < 35~65 dB (at 1 m)
    Insulation Grade Class H
    Wiring Mode Dyn11
    Cooling Mode Dry-type, natural air cooling
    Overload Capacity Allow more than 1.2 times the rated load to work for up to 4 hours
    Enclosure Protection Grade IP 24
    Certificate CE, ISO
    Warranty 12 months
    Working Environment
    Ambient Temperature −15 °C ~ +40 °C
    Relative Humidity ≤ 90% RH, non-condensing
    Altitude < 1000 m, free of corrosive gas and conductive dust

    Note:

    1. The transformer can only convert voltage, and CANNOT convert frequency.
    2. The transformer CANNOT convert 1-phase voltage to 3-phase voltage.
    3. Input/output voltage, power rating, and whether a shell for all transformers can be customized to meet clients' requirements.
    Details
    5 kVA three-phase isolation transformer feature

    Feature

    • Isolation for Enhanced Electrical Safety: The isolation power transformer provides effective isolation between primary and secondary circuits, helping reduce electrical interference and improve system reliability.
    • Non-Ventilated Design: Enclosed structure allows safe operation in dusty, humid, or hazardous industrial environments where ventilation is limited.
    • Compliance with Low Voltage Regulations: Built to meet relevant low-voltage safety standards, ensuring dependable performance in commercial and industrial applications.
    • Flexible Voltage Configuration Options: Supports a wide range of customizable voltages, allowing adaptation to different countries and project requirements.
     

    1.  

      1. Power indicator
      2. Over-temperature indicator
      3. Output voltage digital display screen
    4 kVA to 50 kVA three-phase isolation transformer details

    5 kVA Three-phase Isolation Transformer Schematic Diagram

    4 kVA to 50 kVA three-phase isolation transformer schematic diagram

    5 kVA Three-phase Isolation Transformer Installation Dimensions

    4 kVA to 50 kVA three-phase isolation transformer dimensions

     

    Aluminium Wire Transformer Size Copper Wire Transformer Size
    Open Type: a*b*c=380*200*380 (mm) Open Type: a*b*c=300*170*310 (mm)
    Mounting Size: d*e=260*110 (mm) Mounting Size: d*e=180*140 (mm)
    Protected Type: A*B*C=300*440*500 (mm) Protected Type: A*B*C=300*440*500 (mm)


    Application

    Three-phase isolation transformer for metro and rail transit

    Metro & Rail Transit

    Three-phase isolation transformer for manufacturing and machine shops

    Manufacturing & Machine Shops

    Three-phase isolation transformer for commercial buildings

    Commercial Buildings

    Three-phase isolation transformer for oil, gas and petrochemical

    Oil, Gas & Petrochemical

    FAQ

    Q1. Is this 5 kVA isaolation transformer truly bidirectional — can it step up as well as step down?

    Yes. The isolation transformer operates in both directions: it can step down 480V to 400V or step up 400V to 480V. Note that when used in reverse, the output voltage is typically reduced by approximately 2% due to transformer losses — for example, a reverse-connected 480V input would yield approximately 470V rather than the full rated value. Both voltage directions, as well as all other primary/secondary voltage combinations, are selectable at the time of order.

    Q2. Can the voltage and power rating be customised for my specific application?

    Yes. Both primary and secondary voltages are independently selectable across 10 standard values from 120V to 480V (including 208V, 220V, 230V, 240V, 380V, 400V, and 415V). Winding material (aluminium or copper), enclosure type (open or IP 24 protected), and power rating can all be tailored to project requirements. Custom configurations are available on request — contact Powerhome directly with your target voltage pair and installation conditions.

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    1 review(s)
    5.0 1
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    Brewster | 10/23/2026 1:36 AM
    5 kVA 3-Phase Isolation Transformer Reliable & Efficient
    Using this 5 kVA 3-phase isolation transformer for 480V to 400V conversion in our workshop. The enclosed dry-type design handles dusty conditions well, while efficiency above 95% and low operating noise are great advantages. The integrated wheels make it easy to move, and the solid construction provides reliable electrical isolation for industrial applications.
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