Oil Immersed Transformer

Short Description:

Oil Immersed Transformer: Corrosion-proof, short-circuit resistant, customizable & easy maintenance


  • Transformer Type: Oil immersed
  • Rated capacity: Up to 40MVA
  • Rated voltage: Up to 132kV
  • Frequency: 50 or 60Hz
  • Phase: Single phase and three phase
  • Winding material: Copper or Aluminum
  • Tap changer: Off-load or on-load
  • Vector group: Dyn11, YNd1d1, Yyn0, YNd11 etc.
  • Cooling: ONAN , ONAF, KNAN, KNAF etc.
  • Ambient temperature: -45° C + 60° C
  • Insulation class: A, E, B
  • Dielectric fluids: Mineral oil , Silicone, FR3 oil , MIDEL 7131
  • Standard: IEC, AS, EN, IEEE/ANSI, GOST

Product Details

Product Tags

  Moisture-proof , salt spray-proof and anti-corrosion design, C5-M Marine paintings, specific coating treatment and use of surface can be hot dip zinc coating to withstand the most extreme environmental conditions.

 Strong resistance to sudden short circuits.

7-step stepping lap iron core structure.

 High-Temperature Resistant Insulation System.

 Oil conservator: hermetically sealed or conservator/free breathing.

 Cooler corrugated wall or with radiators.

 Fluid options available,Mineral Oil - Natural Ester Fluid (FR3 fluid)- Silicone etc.

 Special anti-loose structure, no internal looseness during transportation.

 The Tank withstanding pressure up to 115kPA comply with FM3990 requirements.

 All transformers can be designed, customized, and supplied with a wide variety of accessories, as required.

 Adopted isolation valve, the transformer is easy to maintenance and convenient in transportation.

 Below 10MVA transformer, we can meet various small-volume requirements and container transport.

■  Iron Core
Superior silicon lamination for steel core, the lamination joint is processed by oblique cut angle and the latest new technology “seven-step”, which ensures small no-load loss and current.
■  Winding
The winding as the centerpiece of the transformer must be especially protected - both against high electrical stress due to external over voltages and against mechanical overloads by short circuits. Varelen transformers are systematically designed to meet these requirements.

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