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    20 kVA 3 Phase Variac Transformer

    5 out of 5 based on 1 reviews | Write a review
    The three phase variable transformer input voltage 380V, output voltage range 0-430V, or 0-500V, rated full bias current 27A, built-in high quality copper transformer coil, sturdy and durable, it is ideal for use in laboratories, factory equipment, foam cutting and household electricity,
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    Delivery date: 6-12 days

    20 kVA variac variable transformer for sale, 380V input voltage, increase the design of heat sink holes, making the internal better heat dissipation, increasing the service life.


    • Model: ATO-VVR-TH20
    • Rated Power: 20 kVA
    • Input Voltage: 380V
    • Output Voltage: 0~430V, 0~500V
    • Frequency: 50/60 Hz
    • Rated Full Offset Current: 27A
    • Insulation Resistance: ≥5 MΩ
    • Pressure Resistance: 2000 V/1min
    • Weight: 60 kg
    • Dimension: 345mm x 400mm x 580mm
    • Certificate: CE

    Wiring method

    Installation and use of three-phase variac transformer should be noted: the wiring must be firmly pressed, there can be no loose.

    Three-phase variac transformer is a three-phase four-wire system, the input side should be connected to the zero line, when using the regulator to adjust the voltage should be adjusted from 0V to high voltage, the output voltage is different corresponding to the load power is different.

    Variac transformer wiring

    Three Phase 20 kVA Variac Transformer Details

    Three phase variable transformer details

    Three phase variac transformer detail

    Tips: What is a thyristor AC voltage regulator?

    The AC voltage regulating circuit is often composed of thyristors, which are used to regulate the effective value of the output voltage. Thyristor AC voltage regulators have the characteristics of small size and light weight. The output is an AC voltage, but not a sinusoidal waveform, with large harmonic components and low power factor. AC voltage regulation control commonly used phase control. It enables the thyristor to connect the load to the power supply at the selected moment in each cycle of the power supply voltage, and the purpose of voltage regulation can be achieved by changing the selected moment.

    Existing reviews of 20 kVA 3 Phase Variac Transformer
    Reliable variac transformer
    The details of the variac transformer are well done. The materials are thick. The entire variac transformer can be seen clearly from the cover, the binding posts, the handle, the adjustment knob to the copper coil inside. I bought a three-phase 20kVA voltage regulator , and can lift it together with colleagues.
    From: Kylan | Date: 12/05/2022
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