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    75 kVA Isolation Transformer, 3 phase, 480 Volt to 230 Volt

    Safety 75kVA solation transformer come in a NEMA 3R enclosure, which is available in the circuit of AC 50Hz/60Hz and convert 3 phase voltage 480V to 230V, low noise, lower temperature rise, higher efficiency.
    Free shipping
    Delivery date: 10-15days

    Step up and step down isolation transformer is manufactured direct sale and fully compliant with reduced low voltage regulations, is a is a non-ventilated transformer rated for hazardous locations as well as harsh industrial environments.
    75 kVA Isolation Transformer Features

    • 3-phase unit with 75 kVA power rating.
    • Primary voltage of 480V AC on the primary side and secondary voltage of 230V AC on the secondary side.
    • enclosure is IP 20 protection grade (for indoor or outdoor applications).
    • Better protection, high quality workmanship.


    Basics Model ATOSG-75KVA
    Phase 3 phase
    Capacity 75 kVA
    Size 890*460*730 mm (without shell); 950*550*800 mm (with shell)
    Weight 295 kg (without shell); 320 kg (with shell)
    Technical Parameters Primary Voltage 480V (optional: 110V/ 120V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V)
    Secondary Voltage 230V (optional: 110V/ 120V/ 208V/ 220V/ 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 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: Functions of ATO 3 phase isolation transformer
    The main function of three phase isolation transformer on is to fully insulate primary and secondary electricity and circuit. In addition, its iron core has great ability of high-frequency clutter rejection with the features of high-frequency and great loss. Isolation transformer commonly known as safety transformer is usually used to isolate high-frequency clutter from entering control loop.
    Isolation transformer is designed for personal safety in the use, maintenance and commissioning of certain electrical appliance. Taken fixing a color TV as example, the power supply of the color TV is directly rectified into machine, so the chassis of machine could be charged. If a maintenance man cursorily touches this part circuit, he will get an electric shock that endangers his personal safety. In the process of inspection and testing, if the connection between instrument grounding and chassis may cause power supply short-circuited, resulting in the damage to transistors, integrated circuits and test equipment inside machine. Therefore, 3 phase isolation transformer should be used for the maintenance of certain household appliances.

    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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