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    10 kVA Isolation Transformer, 3 phase, 400 Volt to 240 Volt

    5 out of 5 based on 6 reviews | Write a review
    Safety 10 kVA isolation transformer is suitable for circuit of 50 or 60Hz, 3 phase, primary voltage 400V to secondary voltage 240V. The transformers is high quality with lower cost, manufactured direct sale and fully compliant with reduced low voltage regulations.
    30-day Returns
    Delivery date: 10-20 days

    10 kVA dry type isolation transformer step down 3 phase voltage 400V to 3 phase 240V, step up 240V to 400V version is available. It is designed for use in control circuits and general applications such as mechanical and electronic equipment, precision machine tool, CNC machine tool, lighting, etc.

    10 kVA Isolation Transformer Specifications

    Basics Model ATO-SG10KVA
    Phase 3 phase
    Capacity 10 kVA
    Weight of Aluminium Wire Transformer Open type: 75kg
    Protected type: 96kg
    Weight of Copper Wire Transformer Open type: 78kg
    Protected type: 98kg
    Technical Parameters Primary Voltage 400V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    Secondary Voltage 240V (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

    10 kVA Isolation Transformer Installation Dimension

    3 phase isolation transformer dimension

    Aluminium Wire Transformer Size Copper Wire Transformer Size
    Open type: a*b*c=380*240*380mm Open type: a*b*c=380*240*380mm
    Mouting size: d*e=260*150mm Mouting size: d*e=260*150mm
    Protected type: A*B*C=380*530*560mm Protected type: A*B*C=380*530*560mm

    Tips: What is a 10 kVA isolation transformer?

    10 kVA isolation transformer is a step up & step down 3 phase isolation transformer whose input windings and output windings have electrical isolation, it can avoid accidentally contact with the charged body at the same time. The transformer can isolate the respective current of primary and secondary windings. Its principle is the same with ordinary dry-type transformer, also use electromagnetic induction principle to isolate primary power circuit and secondary circuit ground floating to ensure electrical safety. ATO isolation transformers are widely used for control power of general circuit, power of safety lighting and indicator light in the electronics industry, mining enterprises and machine equipment.

    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 10 kVA Isolation Transformer, 3 phase, 400 Volt to 240 Volt
    What is max. allowable operating temperature for this one?
    Referring to this one, what is the max. allowable operating temperature for the 10 kVA isolation transformer?
    From: Drew | Date: 05/04/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The ambient temperature plus indoor temperature of 10kVA isolation transformer is generally about 60-70 degrees, and the maximum temperature rise inside the transformer is about 110-120 degrees.
    Perfect isolation transformer
    Can you provide IECEx flameproof isolation transformers?
    From: Fudd | Date: 04/06/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can provide IECEx flameproof transformer fit for zone 1 or at least gas group IIB.
    What is the momentary overload tolerance of your 3 phase isolation transformers before the core begins to saturate?
    From: Melanie | Date: 05/01/2020
    Was this review helpful? Yes No (0/0)
    ATO Responded
    It depends on the loading time.
    If it is within 30 minutes, the overload capacity can reach 1.2 times the capacity.
    And if it is within 10 seconds, the overload capacity can reach 3-5 times the capacity.
    A question about 10 kVA isolation transformer
    I buy a machine in China which is 220 v, and I bring it to USA to use. Should I choose this 10kVA transformer to convert 220 v- 110v, or convert 110v-220v?
    From: Shairad | Date: 25/09/2018
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Dear friend, the machine you bought in China is 220V therefore your output on the transformer should be 220V. The input into the transformer should be 110V because you are in US. 220V primary voltage, 110V secondary voltage transformer is the item you need. And all isolation transformers om are step up & step down transformers.
    Excellent protection for my service bench
    The isolation transformer appears to be well constructed, and it does. Excellent protection for my service bench while live operating testing circuits.
    From: Don Abraham | Date: 28/07/2018
    Was this review helpful? Yes No (0/0)
    Converts 480V to 240V or 240V to 480V
    The 10 kVA isolation transformer converts 480V to 240V or 240V to 480V. It does not change the frequency.
    From: Thomas | Date: 04/06/2018
    Was this review helpful? Yes No (1/0)
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