three phase transformer

1.Product Introduction 

The 10kV S22 Series Oil-Immersed Distribution Transformer strictly complies with China's GB 20052-2024 Class 1 Energy Efficiency Standard, representing the nation's most advanced high-end energy-saving distribution equipment. This product integrates optimized magnetic circuit design, high-efficiency materials, and fully sealed structural technology, achieving triple optimization in no-load loss, load loss, and operational noise. It combines exceptional safety reliability with an exceptionally long service life.

This product is specifically designed to meet the energy conservation and consumption reduction requirements of power grids under the "dual carbon" context, applicable to 10kV distribution network systems at all levels. It serves as core power distribution equipment for smart city construction, national key projects, high-end industrial parks, and locations with stringent requirements for energy consumption and noise levels.

2. Technical Specifications（customizable）

 • Rated Voltage: 10kV (±2×2.5% tap) on high-voltage side, 0.4kV on low-voltage side • Rated Frequency: 50Hz • Connection Group: Dyn11 • Cooling Method: ONAN (oil-immersed self-cooling) • Rated Capacity: 30kVA to 2500kVA • Impedance Voltage: 4% (standard configuration) • Insulation Class: Grade A • Protective Structure: Fully sealed corrugated oil tank (oil-free) • Operating Environment: -25℃ to +55℃, suitable for harsh outdoor conditions including high humidity, salt spray, and dust.

 3. Key Features

 1. Class 1 Energy Efficiency: Extreme Energy Saving Utilizing high-permeability oriented cold-rolled silicon steel sheets and optimized three-dimensional magnetic circuit design, the no-load loss is approximately 15% lower than S20 and over 40% lower than S13. The overall energy efficiency ranks among the industry's top, enabling significant long-term electricity cost savings for users with an extremely short investment return period.

Ultra-low noise and silent operation: Through multi-stage inclined joints in the iron core, vibration damping via clamping structures, and optimized coil layout, the operating noise level significantly exceeds national standards, being approximately 15-20 dB lower than traditional products. Even during nighttime or in noise-sensitive areas (such as hospitals, schools, and high-end residential complexes), "silent operation" can be achieved.

The fully sealed maintenance-free design employs vacuum oil injection and a fully sealed corrugated oil tank structure, completely eliminating contact between the oil reservoir and air. This effectively prevents oxidation, moisture absorption, and leakage of the insulating oil. It eliminates the need for core lifting or oil replacement, resulting in virtually zero maintenance costs throughout the entire lifecycle and significantly improving equipment availability.

Impact-resistant and highly reliable: The coil employs high-strength oxygen-free copper conductors and vacuum casting/impregnation technology, achieving exceptional mechanical strength and outstanding resistance to sudden short circuits. It can effectively withstand drastic voltage fluctuations and load surges in the power grid, ensuring safe and stable operation with an extremely low failure rate.

Long service life and excellent weather resistance: The high-quality insulating oil is matched with temperature-resistant insulating material systems, with a designed service life exceeding 30 years. The oil tank surface is treated with fine sandblasting and three-proof paint, exhibiting exceptional corrosion resistance and aging resistance, making it perfectly suitable for high-corrosion environments such as outdoor and coastal areas.

4. Application Scenarios 

• National/provincial key power grid projects: New urban/rural power grid construction, intelligent transformation and expansion of aging power grids, establishing benchmarks for energy conservation.

• High-end commercial and residential buildings: super high-rise office towers, large shopping centers, tertiary Grade A hospitals, university towns, and cultural-tourism complexes, with simultaneous consideration for noise reduction and high power supply reliability.

• High energy-intensive/technology-intensive enterprises: chemical plants, new energy industrial parks, data centers, and precision manufacturing facilities, achieving core cost advantages through extreme energy efficiency.

• Infrastructure and Special Power Supply: Power supply for highway service areas, railway stations, seawater desalination plants, and base stations in remote areas demonstrates their superior weather-resistant performance.