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                    20 kVA Isolation Transformer, 3 phase, 380V to 190V

                    5 out of 5 based on 5 reviews | Write a review
                    High performance 20kVA isolation transformer is designed to step down/up the 3 phase voltage 380V to 190V. Primary and secondary windings are separated by aluminium/copper shield, and widely used in various power supply sites with frequency 50Hz/60Hz.
                    SKU: ATO-T-SG20KVA
                    Free Shipping Worldwide
                    Delivery date: 10-20 days

                    High quality and safety isolating transformers, 3 phase, 20kVA power rating, 380V AC input voltage to 190V AC output voltage, is a is a non-ventilated isolation transformer rated for hazardous locations as well as harsh industrial environments.
                    20 kVA Isolation Transformer Specifications

                    Basics Model ATOSG-20KVA
                    Phase 3 phase
                    Capacity 20 kVA
                    Weight of Aluminium Wire Transformer Open type: 110kg
                    Protected type: 135kg
                    Weight of Copper Wire Transformer Open type: 120kg
                    Protected type: 145kg
                    Technical Parameters Primary Voltage 380V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
                    Secondary Voltage 190V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
                    Voltage Convert Three phase to three phase
                    Frequency 50Hz / 60 Hz
                    Winding Material Aluminium/Copper wire (Optional)
                    Work Efficiency ≥95%
                    Insulation Resistance ≥50 MΩ
                    Electrical Strength 3000V AC/1 min
                    Noise <35-65dB (1 meter)
                    Insulation Grade H level
                    Wiring Mode Dyn11
                    Cooling Mode Dry type air cooling
                    Overload Capacity Allow more than 1.2 times rated load to work for up to 4 hours
                    Enclosure Protection Grade IP 24
                    Certificate CE, ISO
                    Warranty 12 months
                    Working Environment Temperature -15℃~+40℃
                    Humidity ≤90%RH, without condensation
                    Altitude <1000m, non corrosive gas and conductive dust

                    Transformer can only convert voltage and CANNOT convert frequency.
                    Transformer CANNOT convert single phase voltage to 3 phase voltage.
                    Input/output voltage, power rating and whether with shell of all transformers, can be customized according to clients' requirements.

                    3 Phase Isolation Transformer Schematic Diagram

                    ATO isolation transformers schematic diagram

                    20 kVA Isolation Transformer Installation Dimension

                    ATO isolation transformer installation dimension

                    Aluminium Wire Transformer Size Copper Wire Transformer Size
                    Open type: a*b*c=440*310*430mm Open type: a*b*c=440*310*420mm
                    Protected type: A*B*C=610*420*610mm Protected type: A*B*C=610*420*610mm
                    Installation Dimenion: D*E=300*165mm Installation Dimenion: D*E=300*165mm

                    Tips: 3 phase isolation transformer loss
                    3d图库When the 3 phase isolation transformer output power is equal to the input power, the efficiency reaches 100%, the transformer will not generate any loss. But in fact this kind of transformer does not exist. Transformer always generates loss during electricity transmission, this kind of loss mainly includes copper loss and iron loss. Copper loss refers to the loss caused by step up & step down transformer coil resistance. When the current goes through the coil resistance and gets heated, part of the electrical energy is consumed and becomes heat loss. Since the coil is generally twined with insulated copper wire, it is called copper loss.

                    Iron loss of the transformer includes two aspects. The first one is the hysteresis loss, when the alternating current goes through the transformer, the direction and magnitude of the magnetic lines through the transformer silicon steel sheet changes, causing friction among the molecules within the silicon steel sheet and heat is released, this process consumes part of the electricity. The other is eddy current loss during the working of isolation transformer. When the magnetic line of force goes through iron core, current will be induced on the plane vertical to the magnetic line of force, since the current forms a closed loop and becomes ring current which shapes an eddy, it is called eddy current. The existence of eddy current makes the core heat and consumes energy, this loss is called eddy current loss.

                    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 20 kVA Isolation Transformer, 3 phase, 380V to 190V
                    Could this 20 kVA isolation transformer eliminate the disturbance of harmonics?
                    I have added reactors to the input and output terminals of my equipment, and have not eliminated the disturbance of harmonics. Could this 20 kVA isolation transformer help me solve the problem?
                    From: Tom Rosser | Date: 28/05/2018
                    Was this review helpful? Yes No (0/0)
                    ATO Responded
                    Dear friend, ATO isolation transformers are not only step up & step down transformers, but also belongs to the safe power source, which can prevent the transmission of some harmonics and protect the device.
                    Completely soundless and odorless
                    The isolation transformer performs just as I hoped it would. I use it in the US to run 220V European appliances on US 120V current. Completely soundless and odorless.
                    From: Elzabeth | Date: 13/07/2018
                    Was this review helpful? Yes No (0/0)
                    Great step up and step down isolation transformer
                    Great step up and step down isolation transformer. I am quite pleased with this product. Although it is a little heavy but then fit for purpose.
                    From: Pierce Primm | Date: 14/02/2019
                    Was this review helpful? Yes No (0/0)
                    Worth the price
                    I am satifying with the service of ATO. I use these 20 kVA isolation transformers for the CNC lathes in our factory. All the CNC lathes work well with the stable three phases voltage from isolation transformers. Good quality products!
                    From: DTHTK | Date: 28/02/2019
                    Was this review helpful? Yes No (0/0)
                    Exactly what I needed.
                    We recently relocated to the USA from Europe. I have a machine with an EU power and so the voltage is not compatible. However after doing research, I saw that people had got it working using this product and so I tried it out. I found this isolation transformer to be a good value for my device.
                    From: Roger | Date: 10/10/2019
                    Was this review helpful? Yes No (0/0)
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