Oil immersed transformers


Oil immersed transformer

Energy saving, easily adapt to the grid, easy connection process, liquid immersed transformer are copper winding,loss noise solution
  • oil transformers
  • 400kva transformers.jpg
  • 13.8kv transformers
  1. oil transformers
  2. 400kva transformers.jpg
  3. 13.8kv transformers

Low noise solution

Efficient transformers with reduced losses

High frequency-low losses

Environmental friendly

Easily adopt to the grid, easy connection process


Customized design

Our product advantages

  • winding


    The windings are made of oxygen-free copper , so the load loss of is lower and the electric performance is better.

  • Iron core

    Iron core

    The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel laminations insulated on both sides, guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise. 

  • The Tank

    The Tank

    The transformer is fully sealed, which ensures the stability of oil quality, extends the service life,  maintenance. At the same time, the tank composed of corrugated radiator adopts phosphating and multi-layer anti-rust spraying technology to produce, which has good weather resistance.

Related product parameters

Main Specifications
Transformer typeOil-immered type
PhasesThres phases or single phases
Capacity30 - 31500kva (customization is available)
Voltageup to 36kv
Oil preservationHermetically Sealed/ Conservator/ Free Breathing
Tap changeroff-load or on-load
Winding material Aluminum/ Copper
Coolerscorrugated wall or radiator
Cooling modeONAN /ONAF
Dielectric liquids
Mineral oil / Dimethyl Silicone/ Vegetable Oil
impedance4% to 8%
 Lossesaccording to customers requirements
Vector groupsDyn11, Yyn11 (according to customers requirements)

Factory Test

test report -transformer.jpg


Varelen offers a complete range of power and distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial, electrical distribution substations, power generation, voltage regulation, mining, traction and commercial applications. Transformers can be used for indoor or outdoor applications and can be provided with off-load and on-load tap changers.
power system.jpg


wooden case packing
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inner packing.jpg
packing wooden case.jpg

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Contact us

Varelen Electric Co., Ltd

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