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    100 kVA Isolation Transformer, Step up/Step down 208V with 400V

    5 out of 5 based on 1 reviews | Write a review
    100 kVA capacity isolation transformer with IP protection grade enclosure for indoor or outdoor use, dry air self cooling of cooling method. Step up or step down isolation transformer to convert the 3 phase voltage between 208V and 400V.
    30-day Returns
    Delivery date: 10-20 days

    Higher safety isolation transformer with 100 kVA power rating, is available in the circuit of AC 50Hz/ 60Hz. It can step down 3 phase voltage 400V to 208V, step up 208V to 400V type is available to select, designed for use in control circuits and general applications such as mechanical and electronic equipment, precision machine tool, CNC machine tool, lighting, etc.

    100 kVA Isolation Transformer Specifications

    Basics Model ATO-SG100KVA
    Phase 3 phase
    Capacity 100 kVA
    Weight of Aluminium Wire Transformer Open type: 335kg
    Protected type: 425kg
    Weight of Copper Wire Transformer Open type: 340kg
    Protected type: 435kg
    Technical Parameters Primary Voltage 208V (optional: 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    Secondary Voltage 400V (optional: 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    Voltage Convert Three phase to three phase
    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 22
    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

    60-100 kVA 3 phase isolation transformer details

    100 kVA Isolation Transformer Installation Dimension

    60kVA 100kVA isolation transformer dimension

    Aluminium Wire Transformer Size Copper Wire Transformer Size
    Open type: a*b*c=760*400*685mm Open type: a*b*c=780*360*630mm
    Mouting size: d*e=500*350mm Mouting size: d*e=500*350mm
    Protected type: A*B*C=650*1150*1080mm Protected type: A*B*C=650*1150*1080mm

    Tips: Difference between three-phase isolation transformer wiring Dyn11 and Dyn0

    1. When the secondary side load of step up/down transformer is not asymmetrical, Dyn11 wring is smaller than that of Yyn0.
    2. Dyn11 wiring can improve the sensitivity of the transformer over-current relay protection device and simplify the wiring protection.
    3. Dyn11 wiring can improve the low-voltage side and the sensitivity of protection device, which is conducive to the selectivity of every level protection device and the expansion of feed radius.
    4. The secondary zero line current of Dyn11 wiring isolation transformer is not limited. This is a great advantage of Dyn11 wiring, but Yyn0 secondary zero line current is not allowed to exceed 25%.
    5. The primary winding of Dyn11 wring has the phase voltage three times larger than the one of Yyn0 and the current three times smaller, so Dyn11 wring is characterized by thinner wire diameter, larger turning number and more insulation inter-layer.

    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 100 kVA Isolation Transformer, Step up/Step down 208V with 400V
    Do you have a 200kVA isolation transformer?
    Do you provide 200kVA isolation transformer to be used for outdoor?
    From: Troy | Date: 20/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Ordinary ATO isolation transformers are used indoors, but they can be customized according to customer needs.
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