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    5 kVA Isolation Transformer, 3 phase, 480V to 400V

    4.8 out of 5 based on 5 reviews | Write a review
    3 phase 5 kVA isolation transformer is designed to step down/ up the voltage 480V to 400V, and widely used in various power supply sites with frequency 50Hz or 60Hz.
    30-day Returns
    Delivery date: 10-20 days

    The 5kVA isolation transformer is high quality, three phase, 480V primary voltage and 400V secondary voltage, manufactured direct sale. Fully compliant with reduced low voltage regulations, is a non-ventilated isolation transformer rated for hazardous locations as well as harsh industrial environments.

    5 kVA Isolation Transformer Specifications

    Basics Model ATO-SG5KVA
    Phase 3 phase
    Capacity 5 kVA
    Weight of Aluminium Wire Transformer Open type: 55kg
    Protected type: 70kg
    Weight of Copper Wire Transformer  Open type: 60kg
    Protected type: 80kg
    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 50Hz / 60 Hz
    Winding Material Aluminium/Copper wire (Optional)
    Work Efficiency ≥95%
    Insulation Resistance ≥50 MΩ
    Electrical Strength 3000V AC/1 min
    Noise <35-65dB (1 meter)
    Insulation Grade H level
    Wiring Mode Dyn11
    Cooling Mode Dry type air cooling
    Overload Capacity Allow more than 1.2 times rated load to work for up to 4 hours
    Enclosure Protection Grade IP 24
    Certificate CE, ISO
    Warranty 12 months
    Working Environment Temperature -15℃~+40℃
    Humidity ≤90%RH, without condensation
    Altitude <1000m, non corrosive gas and conductive dust

    *Transformer can only convert voltage and CANNOT convert frequency.
    *Transformer CANNOT convert single phase voltage to 3 phase voltage.
    *Input/output voltage, power rating and whether with shell of all transformers, can be customized according to clients' requirements.

    3 Phase Isolation Transformer Schematic Diagram

    ATO isolation transformers schematic diagram

    3 Phase Isolation Transformer Details

    3-phase isolation transformer details

    5 kVA Isolation Transformer Installation Dimension

    3 phase isolation transformer dimension

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

    Tips: Dyn11 Wiring Method of 3 Phase Step up & Step down Isolation Transformer

    Dyn11 is ATO step up/down isolation transformers wiring method. D represents that the primary winding adopts triangular form wiring, Y represents the secondary measuring winding adopts star form wiring, n represents to lead the neutral line, 11 represents that the secondary winding phase angle lags 330 degrees compared with the first winding. If use clock representation method and assume the primary winding locates at the center of 12 o'clock, then the secondary winding locates at 11 o'clock position with an included angle of 30 degrees.

    How to Test Step Up & Step Down Isolation Transformer?

    Need more detail of ATO isolation transformer? Here is a good explanation about it in this video. To test the accuracy of the transformer voltage, we take a 3000 VA single phase 220V iuput to 110V output isolation transformer as an example.

    Existing reviews of 5 kVA Isolation Transformer, 3 phase, 480V to 400V
    Is your isolation transformer bidirectional?
    For example, if your transformer is to convert 3ph, 220V primary to  3ph, 400V secondary, and I apply 3ph, 400V at secondary side, will I get 3ph, 220V at primary side?
    From: Charlie Chisholm | Date: 14/10/2019
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our Isolation Transformer can be used in both directions, but the output voltage will be reduced by 2% incase of reverse. Per your example, the voltage of 220V will become 215V.
    Very affordable isolation transformer
    This is very affordable isolation transformer, I bought this to work mainly up scaling 110v to 220v, it has done its job and has worked alot better than the items found on other website.
    From: Tatsuo Hase | Date: 06/11/2018
    Was this review helpful? Yes No (0/0)
    Do you have warranty policy
    Do you have warranty policy for this isolation transformer?
    From: Nicholas | Date: 09/07/2018
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Dear friend, ATO offers at least 1 year warranty for all isolation transformers, and full lifespan aftersales service.
    Voltage stability, Easy installation
    Purchased this 5 kVA isolation transformer for the machine tools in the workshop, easy to install, and the voltage is stable during operation.
    From: Keith | Date: 12/06/2018
    Was this review helpful? Yes No (0/0)
    High Quality isolation transformer
    Great isolation transformer for the price. The quality is much better than expected and it runs quite cool.
    From: Trent | Date: 14/05/2018
    Was this review helpful? Yes No (0/0)
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