40KVA 3 phase autotransformer

40KVA 3 phase autotransformer

40KVA 3 phase autotransformer is manufactured and supplied by Shuogong Power, a leading transformer company in China.

Its main function is to step down, which can step down the input voltage to the usable range output, for example, step down the 380V input voltage to 200V/220V output.

This 40KVA 3 phase autotransformer is a dry-type transformer, available in aluminum wire and copper wire, and supports OEM and various voltage customizations.

40KVA 3 phase autotransformer for sale at manufacturer price.

This 40KVA three phase transformer is a dry-type autotransformer with built-in silicon steel sheet, which has good magnetic flux performance, high heat dissipation coefficient and low magnetic loss.

The 3 phase autotransformer with a total power of 40KVA is supplied by Shuogong Power, a leading transformer manufacturer in China,

Its standard input voltage is 380V, output voltage is 220V/200V, frequency is 50/60Hz, and copper/aluminum wire is optional.

Dry-type transformer, electromagnetic induction, primary and secondary windings are insulated separately.


Model SOB-40KVA
Phase 3 Phase
Capacity 40 kVA
Input Voltage(Optional) AC 380V
Output Voltage (Optional) AC 220V, 200V
Frequency 50Hz / 60Hz
Winding Material (Optional) Aluminum Wire, Copper Wire
Cooling Method Self-Cooling or Wind-Cooling
Working Efficiency ≥98%
Protection Grade IP21
Waveform Distortion No distortion (compared with output wave)
Insulation Resistance ≥ 150MΩ
Wiring Yn0
Electrical Strength Power frequency sinusoidal voltage 3000V lasts for 1 minute, no breakdown and flicker
Overload Protection Can withstand instantaneous 2 times the rated current
Moisture-Proof Type (Optional) Open type, sealed type
Ambient Temperature -20℃ ~ +45℃
Altitude ≤ 2500m
Relative Humidity 0-95%
Noise ≤35dB (within 1 meter)
Design Service Life 15 years
Use Environment No explosion, rain and snow corrosion place, and no gas and conductive dust in the medium that can corrode metal and damage insulation
Weight 145 kg
Dimension 430*270*420 mm

35KVA 3 phase autotransformer price:

The retail price of a 40KVA transformer on the market is usually $3500-3900.

Here you will get exclusive preferential prices for transformer manufacturers.

Contact us now to get your 40KVA 3 phase transformer discounted price.

40KVA 3 phase autotransformer advantages:

Choosing a three phase transformer manufactured and supplied by Shuogong Power has the following advantages:

  • Made of high quality silicon steel sheet.
  • Optional copper wire or aluminum wire.
  • Available with or without housing.
  • Configure the scroll wheel.
  • Fast delivery.
  • 100% quality assurance.
  • Sufficient power never cut corners.

3 phase autotransformer advantages.

  • three phase autotransformer consumes less materials and has low cost. The amount of silicon steel sheet and copper wire used in transformer is related to the rated induced potential and rated current of the winding (that is, it is related to the capacity of winding). The winding capacity of 3-phase autotransformer is reduced, the material consumed is also reduced, and the cost is reduced, so the price is lower.
  • three phase autotransformer has low loss and high efficiency. Due to the reduction in the amount of copper wire and silicon steel sheet, under the same current density and magnetic flux density, the copper loss and iron loss of a 3-phase autotransformer are less than that of the dual-winding transformer, so the benefit is higher.
  • three phase autotransformer is easy to transport and install. 3-phase autotransformer is lighter in weight, smaller in size and smaller in footprint than the dual-winding transformer of the same capacity.
  • three phase autotransformer improves the ultimate manufacturing capacity of the transformer. The ultimate manufacturing capacity of transformers is generally limited by transportation conditions. Under the same transportation conditions, the manufacturing capacity of an autotransformer is larger than that of the double-winding transformer.


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