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    100 kVA Isolation Transformer, step up/step down 208V with 120V

    100 kVA capacity isolation transformer with NEMA 3R enclosure for indoor or outdoor use, dry air self cooling of cooling method. Step up and step down isolation transformer to convert the 3 phase voltage between 208V and 120V.

    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 208V to 120V, can also step up 120V to 208V, 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 ATOSG-100KVA
    Phase 3 phase
    Capacity 100 kVA
    Size 890*460*730 mm (without shell); 950*550*800 mm (with shell)
    Weight 375 kg (without shell); 400 kg (with shell)
    Technical Parameters Primary Voltage 208V (optional: 110V/ 120V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    Secondary Voltage 120V (optional: 110V/ 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
    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 Wiring Method
    isolation transformer wiring method
    Isolation Transformer Application Areas
    isolation transformer application areaTips: Difference between three-phase transformer wiring Dyn11 and Dyn0

    1. When the secondary side load of 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 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.

    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.

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