Oil immersed transformers


Pad mounted transformer

easily adapt to the grid, easy connection proess, Designed and manufactured bespoke with top or side connections
  •  oil filled padmounted transformer
  • distribution transformer 2500kva
  • transformer suppliers
  • pad mounted transformers
  • 2500kva transformers
  1.  oil filled padmounted transformer
  2. distribution transformer 2500kva
  3. transformer suppliers
  4. pad mounted transformers
  5. 2500kva transformers

Low noise solution

Designed and manufactured bespoke with top or side connections

Environmental friendly

Vegatable oil /Mineral oil


Customized design

Our product advantages

  • 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. 

  • Winding


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

  • 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/ KNAN
Dielectric fluids
Mineral oil / Dimethyl Silicone/ Vegetable Oil
Impedance4% to 8%
 Lossesaccording to customers requirements
Vector groupsDyn11, Yyn11 (according to customers requirements)
StandardIEC, ANSI
 Installation locationwithout fire, explosion danger, serious foul, chemical corrosion, or violent vibration. Indoor And outdoor.

Factory Test & Report



Varelen offers a complete range of power and distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial,and commercial applications. Our oil-immersed transformers are manufactured in accordance with the most demanding industry and international standards. Transformers can be used for indoor or outdoor applications and can be provided with off-load and on-load tap changers.

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Contact us

Varelen Electric Co., Ltd

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