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    4 kVA Isolation Transformer, 3 phase, 400/230V to 208/120V

    Reasonable price 4kVA isolation transformer, convert 3 phase voltage 400/230V input to 208/120V output, provides increased reliability and higher efficiency, make this step up/down transformer ideal for a wide range of applications.
    Free shipping
    Delivery date: 10-15days

    4 kVA Isolation Transformer Features:

    • To step down/up the 3 phase voltage 400/380V to 208/120V.
    • Primary and secondary windings are separated by aluminium/copper shield.
    • Available in the circuit of AC 50Hz/60Hz.
    • Better protection, high quality workmanship.

    4 kVA Isolation Transformer Specifications

    Basics Model ATOSG-4KVA
    Phase 3 phase
    Capacity 4 kVA
    Size 350*230*285 mm (without shell); 380*400*360 mm (with shell)
    Weight 35 kg (without shell); 45 kg (with shell)
    Technical Parameters Primary Voltage 400V/ 230V (optional: 110V/ 120V/ 208V/ 220V/ 240V/ 380V/ 415V/ 480V)
    Secondary Voltage 208V/ 120V (optional: 110V/ 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 20
    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 Wiring Method
    isolation transformer wiring method
    Isolation Transformer Application Areas
    isolation transformer application areaTips: Characteristics of 4 kVA 3 phase isolation transformer at the AC power output

    1. Avoid the current distortion of non-linear load to affect the normal operation of AC power and influence to the Grid, it plays a role in purifying the power Grid.
    2. Take sample at the input end of this three phase 400/230V to 208/120V isolation transformer, so that the distortion of the non-linear load current will not affect the accuracy of the sampling and the control signal that can reflect the actual situation can be obtained.
    3. If the load is not balanced, it will not affect the normal operation of the stabilized voltage power supply.

    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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