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    20 kVA Isolation Transformer, 3 phase, 480V to 120V

    High performance 20kVA isolation transformer is designed to step down/up the 3 phase voltage 480V to 120V. Primary and secondary windings are separated by copper shield, and widely used in various power supply sites with frequency 50Hz/60Hz.
    Delivery date: 6-12 days

    High quality and safety isolating transformers, 3 phase, 20kVA power rating, 480V AC input voltage to 120V AC output voltage, is a is a non-ventilated automation transformer rated for hazardous locations as well as harsh industrial environments.

    Basics Model ATOSG-20KVA
    Phase 3 phase
    Capacity 20 kVA
    Size 520*240*520 mm (without shell); 700*370*770 mm (with shell)
    Weight 180 Kg (without shell); 220 Kg (with shell)
    Technical Parameters Primary Voltage 480V (optional: 110V/ 120V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V)
    Secondary Voltage 120V (optional: 110V/ 208V/ 220V 230V/ 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: Transformer loss
    When the transformer output power is equal to the input power, the efficiency reaches 100%, the transformer will not generate any loss. But in fact this kind of transformer does not exist. Transformer always generates loss during electricity transmission, this kind of loss mainly includes copper loss and iron loss. Copper loss refers to the loss caused by transformer coil resistance. When the current goes through the coil resistance and gets heated, part of the electrical energy is consumed and becomes heat loss. Since the coil is generally twined with insulated copper wire, it is called copper loss.
    Iron loss of the transformer includes two aspects. The first one is the hysteresis loss, when the alternating current goes through the transformer, the direction and magnitude of the magnetic lines through the transformer silicon steel sheet changes, causing friction among the molecules within the silicon steel sheet and heat is released, this process consumes part of the electricity. The other is eddy current loss during the working of transformer. When the magnetic line of force goes through iron core, current will be induced on the plane vertical to the magnetic line of force, since the current forms a closed loop and becomes ring current which shapes an eddy, it is called eddy current. The existence of eddy current makes the core heat and consumes energy, this loss is called eddy current loss.

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