Oil Immersed Transformers

Reliable Oil Immersed Transformers – Efficient & Durable Solutions

Oil Immersed Transformers of Danish

What is Oil Immersed Transformer?

An Oil Immersed Transformer is a type of electrical transformer that uses insulating oil as a cooling and insulating medium. The oil serves two primary purposes: it insulates the internal components (windings and core) and dissipates the heat generated during operation.

These transformers are widely used in power generation, transmission, and distribution systems to step up or step down voltage levels efficiently.

Applications of Oil Immersed Transformers

  1. Power Generation: Steps up voltage for efficient transmission from power plants.

  2. Transmission Networks: Used in substations to step down voltage for distribution.

  3. Industrial Facilities: Powers heavy machinery and industrial equipment.

  4. Renewable Energy: Converts electricity from renewable sources like wind and solar farms for grid integration.

Danish Power's World-Class Oil Immersed Transformers—Engineered for Excellence!

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The R&D team of experts continuously work on developing one of the most advanced designs to withstand shortcircuits. Oil Immersed transformers are crafted with the utmost care in workmanship & selection of quality raw materials, ensuring a long and maintenance-free life.

Features:

  • Robust design to take care of frequent short circuits.
  • Manufactured with prime CRGO using step-lap design for low losses along with availability of Hydraulic Core Lifting Facility
  • Windings made up of Copper or Aluminum manufactured using Strip (PICC or CTC) /Wire / Foil
  • Step up and Step down transformers offered.
  • Low noise levels
  • Various rating Type-Tested for Short-Circuit, Impulse Voltage Withstand & Temperature Rise Tests at KEMA, CPRI & ERDA.

Technical Specifications:

  • Ratings: 3 phase upto 66 kV 50 MVA & 1 phase upto 33 kV 333 kVA
  • Frequency: 50/60 Hz
  • Applicable Standards: Latest versions of IS:1180, IS:2026, IEC:60076, ANSI 57, BS, SANS 680
  • Class of Insulation : A/B
  • Cooling typically as ONAN (Oil Natural Air Natural) but also available with other High Capacity Cooling options such as ONAF (Oil Natural Air Force), OFAF (Oil Forced Air Forced), OFWF (Oil Forced Water Forced), KNAN or others upon request.
  • Vector Group: Any as per customer requirement like Dyn11, Yzn11, Dd0, etc.
  • Insulating Fluid: Mineral Oil / Silicon Oil, both inhibited & inhibited, as per IS/IEC/ANSI/BS/SANS Standards
  • Biodegradable Ester Filled Transformers also offered
  • Standard Accessories as per customer specifications

Options:

  • Corrugated Fin Radiators or Pressed Steel Radiators
  • Sealed type or Breathing type with Conservator
  • CSP (Completely Self-Protected) Type
  • DGPT2/ DMCR protection device for sealed type transformers,
  • Tappings: Off Circuit Tap Changer with tapping range of 5, 7 or 9 positions OR On Load Tap Changer with an Automatic Voltage Regulating & Remote Tap Change Control Panel (AVR cum RTCC Panel) with tapping range from 7 to 27 positions
  • Termination: Porcelain / Cycloaliphatic / Epoxy / Touch Proof Plug-in type Bushings with option of Cable Box / Bus Duct
  • RTD Temperature Sensors (analog/ digital) for alarm & trip, with options of 4-20 mA output or RS-485 for SCADA compatibility
  • Option are available with long life maintenance free Breathers
  • Tanks: Usually made of Mild Steel but also available of Stainless Steel
  • Paint options for tanks such as Flow Painting (PU Paint), Powder Coating or Metallizing / Galvanization

Contact us for Oil Immersed Transformers

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