Oil Cooled Transformers

Amrest Electricals Limited is a distinguished manufacturer exporters and suppliers of high-performance Oil Cooled Transformers in India. Our transformers are designed to provide reliable and efficient power distribution for a variety of applications, from industrial plants to utility grids. With a focus on quality, durability, and advanced, Amrest Electricals Limited stands out as a leader in the electrical industry.

Product Features

Superior Cooling Efficiency:

  • Effective Heat Dissipation: Utilizes high-grade insulating oil to efficiently dissipate heat generated during operation, ensuring optimal performance and longevity.
  • Natural and Forced Cooling: Available in both ONAN (Oil Natural Air Natural) and ONAF (Oil Natural Air Forced) cooling options to suit different application needs.

Robust Design and Construction:

  • High-Quality Materials: Made from top-grade materials, including high-conductivity copper windings and high-grade steel cores, to ensure durability and efficiency.
  • Sealed Construction: Features a sealed tank design to prevent contamination and oxidation of the insulating oil, enhancing reliability and reducing maintenance.

Enhanced Safety:

  • Protection Systems: Equipped with comprehensive protection systems, including Buchholz relay, pressure relief devices, and oil level indicators, to ensure safe operation.
  • Fire Resistant: Uses non-flammable or fire-retardant insulating oil to enhance safety in critical applications.

Customization and Flexibility:

  • Wide Range of Ratings: Available in various power ratings and voltage classes to meet specific customer requirements.
  • Custom Designs: Tailored solutions to match unique operational demands, including special configurations and additional features.

Technical Specifications

  • Power Rating: From 50 kVA to 100 MVA
  • Voltage Class: Up to 230 kV
  • Frequency: 50 Hz / 60 Hz
  • Cooling Type: ONAN, ONAF
  • Insulation Class: A or B as per customer requirements
  • Temperature Rise: As per IEC/ANSI standards
  • Tapping Range: ±10% or as specified
  • Impedance Voltage: Customized as per requirement


  • Industrial Plants: Essential for providing reliable power to manufacturing facilities, refineries, and processing plants.
  • Utility Grids: Critical for power generation stations, transmission substations, and distribution networks.
  • Commercial Buildings: Suitable for large commercial complexes, shopping malls, and office buildings requiring stable power supply.
  • Renewable Energy: Ideal for integration with wind farms, solar power plants, and other renewable energy sources.

Environmental and Safety Benefits

  • Eco-Friendly Insulating Oil: Utilizes biodegradable or less environmentally hazardous insulating oils.
  • Leak Prevention: Advanced sealing techniques to prevent oil leaks and reduce environmental impact.
  • Energy Efficiency: Designed to minimize losses and improve overall energy efficiency.

Amrest Electricals Limited is committed to delivering top-quality electrical solutions backed by years of expertise and innovation. Our dedication to customer satisfaction and excellence in makes us a trusted partner for all your transformer needs

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