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    15 kVA Isolation Transformer, Single phase, 208V to 110V

    5 out of 5 based on 2 reviews | Write a review
    Affordable single phase 15 kVA isolation transformer adopts high quality material and advanced technology, it has advantages of damp- proof and convenient maintenance, mainly used in power supply occasions of AC 50~60Hz, step down or step up voltage between 110V and 208V.
    30-day Returns
    Delivery date: 10-20 days

    Isolation transformers serve as secure power sources and are commonly employed in machine repair and maintenance to provide protection, prevent damage from lightning, and filter out electrical disturbances. Here is a demonstration video of a single phase isolation transformer.


    • 15 kVA capacity, available in the circuit of AC 50Hz/60Hz.
    • To step down/up the single phase voltage 208V to 110V ( Various voltages of primary and secondary are available here for your selection).
    • High efficiency and low temperature rise.
    • IP 20 protection grade of enclosure for indoor or outdoor use, rated for hazardous locations as well as harsh industrial environments.

    Basic Specifications

    • Model: ATO-DG15kVA
    • Capacity: 15kVA
    • Phase: Single phase
    • Winding Material: Aluminum/Copper wire (Optional)
    • Work Efficiency: ≥95%
    • Primary Voltage: 208V AC (Optional: 110V/ 120V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    • Secondary Voltage: 110V AC (Optional: 24V/ 36V/ 48V/ 120V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
    • Weight: 124 kg

    Technical Specifications

    • Cooling Mode: Natural or air cooling
    • 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℃)
    • Overload Capacity: Allow more than 1.2 times rated load to work for up to 1 hour
    • Induced Overvoltage Withstand Test: 125Hz/800V/min
    • Impedance Voltage: About 6%
    • Total Losses: 10%
    • Certification: CE, ISO
    • Temperature: -15℃~+45℃
    • Enclosure Protection Grade: IP20
    • Warranty: 12 months


    DG isolation transformer schematic diagram


    Single phase isolation transformer details

    Tips: Other functions of the isolation transformer

    An isolation transformer is added for personal safety when using some electrical appliances. For example, when repairing a color TV set, the maintenance personnel may suffer from an electric shock if he contacts this circuit accidentally because the power supply unit of the color TV set is connected with the electric supply, thus endangering his personal safety. When repairing some household appliances, the isolation transformer should also be connected. The connection method is: Connect one connector of the isolation transformer to the socket and the other connector to another socket firstly, then connect the repairing household appliance to the socket where the isolation transformer is connected.


    1-phase isolation transformer dimension

    Aluminium Wire Transformer Size

    Without Enclosure: a*b*c=290*300*420mm

    Mouting Size: D*E=150*180mm (aperture: 20*10mm)

    With Enclosure: A*B*C=380*530*560mm

    Copper Wire Transformer Size

    Without Enclosure: a*b*c=300*330*345mm

    Mouting Size: D*E=190*200mm (aperture: 20*10mm)

    With Enclosure: A*B*C=380*530*560mm


    360 Days warranty

    Thank you for buying industrial automation products on, all products sold by ATO and the partner cover a 360-days-warranty, effective from the date of receiving the products.

    What is covered?

    ATO is responsible for providing free spare parts, free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than ATO store or a ATO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than ATO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by ATO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a ATO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
    Existing reviews of 15 kVA Isolation Transformer, Single phase, 208V to 110V
    Question about size
    What is the attached transformer IP 54 enclosure dimension? And can it be used outdoor?
    From: Alan | Date: 22/10/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Transformer IP 54 shell size is 380*530*560mm.
    2. The transformer can be used outdoors, but a rainproof shelter is required to prevent it from being exposed to rain.
    Question for ATO 1-phase isolation transformer
    For this 1-phase 15 kVA capacity isolation transformer, can you provide  L,L,N,G output config?
    From: Gabriel Isko | Date: 11/06/2019
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can. Just confirm with us by email after ordering..
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