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    30 kVA 3 Phase Variac Transformer

    30 kVA three phase variac transformer shell is made of metal, built-in copper wire, flame retardant, safe and durable, rated current 40A, input voltage 380V, output voltage 0-430V and 0-500V for choice.
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    Delivery date: 6-12 days

    40A 3 phase variac voltage regulator has the functions of voltage regulation, temperature control, speed regulation, dimming and power control. The voltage output meter is responsive and the scale display is accurate.


    • Model: ATO-VVR-TH30
    • Rated Power: 30 kVA
    • Input Voltage: 380V
    • Output Voltage: 0~430V, 0~500V
    • Frequency: 50/60 Hz
    • Rated Full Offset Current: 40A
    • Insulation Resistance: ≥5 MΩ
    • Pressure Resistance: 2000 V/1min
    • Weight: 100 kg
    • Dimension: 345mm x 400mm x 1100mm
    • 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

    3 Phase 30 kVA Variac Voltage Regulator Details

    Three phase variable transformer details

    Three phase variac transformer detail

    Tips: How does a three phase variac transformer work?

    The working principle of the three-phase variac transformer is to connect a four-layer three-terminal semiconductor device between the power supply and the load, and with the corresponding trigger control circuit board, the voltage, current and power applied to the load can be adjusted. It is mainly used for heating power adjustment of various electric heating devices. It can be adjusted "manually" or cooperated with electric regulating instruments, intelligent regulating instruments, PLC and computer control systems to realize constant value or program control of heating temperature.

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