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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.
    Delivery date: 6-12 days

    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.

    • 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.
    • NEMA 3R enclosure (for indoor or outdoor applications).
    • Better protection, high quality workmanship.


    Basics Model ATOSG-75KVA
    Phase 3 phase
    Capacity 75 kVA
    Size 700*320*670 mm (without shell); 1000*500*1050 mm (with shell)
    Weight 420 Kg (without shell); 500 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 Single phase to single phase, three phase to three phase, three phase to single phase
    Frequency 50Hz / 60 Hz
    Work Efficiency ≥95%
    Insulation Resistance ≥5 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.
    Product Application Areas
     isolation transformer application fieldTips: Functions of isolation transformer
    The main function of isolation transformer 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, isolation transformer should be used for the maintenance of certain household appliances.

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