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    4 kVA Isolation Transformer, single phase, 220V to 110V

    5 out of 5 based on 1 reviews | Write a review
    Single phase dry isolation transformer is 4 kVA power rating, applies to AC 50/ 60Hz, convert 220V primary voltage to 110V secondary voltage, it can be made open type or protected type. High quality isolation transformer with cheap price, making worthy to have it.
    Delivery date: 10-20 days

    Affordable 4 kVA dry type isolation transformer adopts high quality material and advanced technology, is designed to step up/down the AC single phase voltage between 220 volt and 110 volt that with frequency 50Hz/60Hz.

    4 kVA Isolation Transformer Specifications

    Model ATO-DG4kVA
    Phase Single phase
    Capacity 4kVA
    Primary Voltage 220V AC (optional: 110V/ 120V/ 208V/ 230V/ 240V)
    Secondary Voltage 110V AC (optional: 120V/ 208V/ 220V/ 230V/ 240V)
    Frequency 50Hz / 60Hz
    Winding Material Aluminum/Copper wire (Optional)
    Work Efficiency ≥95%
    Insulation Resistance ≥50 MΩ
    Electrical Strength 2000V AC/1 min
    Noise ≤35dB (1 meter)
    Insulation Grade Grade B (130℃), Grade F (155℃), Grade H (180℃)
    Cooling Method Natural or air cooling
    Overload Capacity Allow more than 1.2 times rated load to work for up to 1 hour
    Induced Overvoltage Withstand Test 125Hz/800V/min
    Transformation Ratio <3%
    Air Carrying Current <6%
    Impedance Voltage about 6%
    Total Losses 10%
    Certification CE, ISO
    Temperature -15℃~+45℃
    Humidity ≤90%RH, without condensation
    Altitude <2000m, non corrosive gas and conductive dust
    Enclosure Protection Grade IP20
    Warranty 12 months
    Weight of Aluminium Wire Transformer Open type: 37kg
    Protected type: 55kg
    Weight of Copper Wire Transformer Open type: 30kg
    Protected type: 50kg


    Transformer can only convert voltage and CANNOT convert frequency.
    Transformer CANNOT convert single phase voltage to 3 phase voltage.
    Support voltage customization, various specifications customization.

    Single Phase Isolation Transformer Schematic Diagram
    800 VA-15 kVA single phase isolation transformer schematic diagram
    4 kVA Isolation Transformer Dimension

    1-phase isolation transformer dimension

    Aluminium Wire Transformer Size Copper Wire Transformer Size
    Open type: a*b*c=210*230*230mm Open type: a*b*c=192*210*220mm
    Mouting size: D*E=150*170mm (aperture: 18*8mm) Mouting size: D*E=140*160mm (aperture: 17*8mm)
    Protected type: A*B*C=300*440*500mm Protected type: A*B*C=300*440*500mm

    Tips: Faults of Single Phase Step UP/Down Isolation Transformer

    Internal faults
    Internal faults of a single phase step up & step down isolation transformer include interphase short circuit, turn-to-turn short circuit of the winding and grounded short circuit of earth neutral system and winding grounding system. These faults are quite serious, because the high temperature arc generated by short-circuit current will not only burn the iron core of winding insulation box, but also makes the insulating material and isolation transformer oil to decompose, thus producing a large amount of gas, which might lead to local deformation and break of transformer oil tank, or even explosion hazard. Therefore, when an internal fault occurs in the transformer, the transformer shall be removed quickly.

    External faults
    External faults of a single phase isolation transformer mainly include the interphase short circuit and grounded short circuit occurring on the bushing shell and outgoing line of the transformer. In case of such a fault, the transformer should also be rapidly removed, so as to minimize the impact of short circuit current on the transformer.

    How to Test Step Up & Step Down Isolation Transformer?

    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.

    Existing reviews of 4 kVA Isolation Transformer, single phase, 220V to 110V
    Would like to buy your 4kVA isolation transformer
    For your 4kVA single phase isolation transformer, does it work safely based on  /- 4% input voltage tolerance "supply"?
    From: Robert Alcala | Date: 28/07/2020
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, its okay up to 5% supply voltage varaiation tolerance.
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