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    800VA Control Transformer, 220/380V to 120/48V

    5 out of 5 based on 2 reviews | Write a review
    Control and lighting purposed mini dry type air automatic mode transformer with 800VA capacity, single phase, 2 groups of 220/380V primary voltages and 2 groups of 120/48V sencondary voltage. Step down control transformer is suitable for circuit of AC 50/60Hz.
    SKU: ATO-T-BK800VA
    30-day Returns
    Delivery date: 6-12 days

    1-phase 800VA control transformer on sales, step down 220/380V AC input to 120/48V AC output in 50Hz or 60Hz system. Primary and secondary voltages are customizable and but should note that primary voltage not exceeding 500V, secondary voltage not exceeding 240V.


    Product Name Single phase control transformer 
    Product Model ATOBK-800VA
    Winding Material Enameled copper wire or enameled aluminum wire
    Capacity 800 VA
    Primary Voltage (VAC) 110, 120, 208, 220, 230, 240, 380, 400, 480, 110/220, 120/240, 240/480...(Customized)
    Secondary Voltage (VAC) 6, 12, 24, 36, 48, 120/48, 110/24, 208/36, 220/48, 230/36, 240/120, 120/24/12, 110/36/24, 127/36/6, 208/48/36/24...(Customized)
    Frequency 50 / 60Hz
    Insulation Level F / H
    Withstand Voltage Test Primary to secondary 2.5KV/min
    Primary to safety ground 2.5KV/min
    Secondary to safety ground 1.5KV/min
    Insulation Resistance Primary to secondary 2500V>100 megohm
    Primary to safety ground 2500V>100 megohm
    Secondary to safety ground 1500V>100 megohm
    Induction Withstand Voltage Test 125Hz/ 800V/min
    Ground Resistance 25A<80 milliohm
    Cooling Method Natural or air cooling
    Transformation Ratio <3%
    Air Carrying Current <6%
    Impedance Voltage about 6%
    Total Losses 0.1
    Efficiency 80%~99%
    Operating Temperature -25℃~40℃ (40℃, 93% RH, 56 days)
    Storage Temperature -25℃~100℃ (40℃, 93% RH, 56 days)
    Certificate CE, ISO
    Warranty 12 months
    Size Overall size: 150*135*155mm, Hold distance for installation: 120*115mm, Installation hold: 12*7mm  
    Weight 13kg

    Schematic diagram illustration

    Control transformer schematic diagram illustration

     Control transformer dimension

    Control transformer dimension

    Overall size (mm) Hole distance for installation (mm) Installation hole
    (mm) K x J
    B E D A C
    150 135 155 120 115 12 x 7


    The control transformer is a kind of small dry-type transformer, which is often used as the power supply of local lighting, signal lamp or indicator lamp, and as the power supply of control circuit in electrical equipment. Two points should be paid attention to when using the control transformer: One is the power of the transformer, the other is the correct wiring.

    1. The total power of the load connected to the secondary side shall not be greater than the power of the control transformer, and short circuit is not allowed. Otherwise, the temperature will be too high, and transformer will be burned if it is serious.

    2. The primary and secondary wiring of the control transformer shall not be wrongly connected, especially the primary side wiring. The voltage value of the primary side shall be marked on its terminal. It is not allowed to connect the 380V power line to the 220V terminal, but the 220V power line can be connected to the 380V terminal. At this time, all the output voltage of the secondary side will be reduced by 1.73 times. The secondary side load shall be connected to the corresponding terminal according to its rated voltage, for example, the 6.3V indicator light shall be connected to the 6.3V terminal, the 36V lighting bulb of the machine tool shall be connected to the 36V terminal, and the 127V AC contactor coil of the machine tool shall be connected to the 127V terminal.

    Existing reviews of 800VA Control Transformer, 220/380V to 120/48V
    Received my specially customized control transformer
    Received my specially customized all-copper control transformer, the material is thick, the details of the treatment of good taste, even if a long time running will not appear heat phenomenon, stable voltage, reliable quality, the output voltage is also very accurate.
    From: Gael | Date: 14/06/2022
    Was this review helpful? Yes No (0/0)
    Excellent quality industrial control transformer
    Excellent quality industrial control transformer. It was a great price and was delivered quickly and saved me from resorting to more expensive options. I used this on my industrial saw machine. It fit perfect (I bought it to replace the old original) and works perfectly.
    From: Bradlee | Date: 16/03/2020
    Was this review helpful? Yes No (0/0)
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