Oil-Immersed Transformers

Grade 1 Energy-Efficient Oil-Immersed Distribution Transformer

Also known as: Grade 1 Oil-Immersed Transformer; High-Efficiency Distribution Transformer

The Grade 1 energy-efficient oil-immersed transformer is designed for distribution systems where reduced electrical losses and long-term operating cost are important project requirements.

Final voltage, capacity, losses, impedance, accessories, dimensions and applicable standards are confirmed according to the project specification and quotation.
Product overview

Design and operating characteristics

Available configurations can be designed to meet applicable Grade 1 energy-efficiency requirements under GB 20052-2024. Optimized core materials, magnetic-flux density and winding structures help reduce no-load and load losses while maintaining stable temperature and noise performance.

The fully sealed corrugated oil tank provides transformer-oil volume compensation while reducing direct contact between the oil and the external atmosphere. The compact structure supports straightforward installation and reduced maintenance requirements.

Grade 1 refers to the applicable Chinese energy-efficiency classification under GB 20052-2024. It is not presented as equivalent to EU, Canadian or U.S. efficiency classifications.

Key features

  • Grade 1 energy-efficiency configurations available
  • Reduced no-load and load losses
  • Optimized core and winding design
  • Fully sealed corrugated oil-tank structure
  • Low operating noise
  • Efficient natural oil and air cooling
  • Compact installation and reduced maintenance

Typical applications

Commercial developments, industrial facilities, residential distribution systems, public infrastructure, data centres and projects focused on lifecycle energy savings.

Quotation preparation

Information to include with your RFQ

  • Rated capacity and primary/secondary voltage
  • Frequency, phase and vector group
  • Impedance and efficiency or loss requirements
  • Tap range and OLTC or off-circuit tap requirement
  • Cooling method, bushings, monitoring and protection accessories
  • Installation environment, applicable standard, destination and delivery date

Technical specifications, single-line diagrams and project documents can be emailed to sales@boreviax.com.

Grade 1 Energy-Efficient Oil-Immersed Distribution Transformer product configuration