distribution transformer

1.product introduction

The 10kV S20 series oil-immersed distribution transformer strictly follows the GB 20052-2024 secondary energy efficiency standard, and is currently a popular energy-saving power distribution equipment with leading energy efficiency levels in China. The product has deeply optimized the magnetic circuit structure and material process. It adopts high magnetic conductivity and low loss oriented silicon steel sheet and fully sealed corrugated fuel tank design. It has both high reliability and long life characteristics while achieving ultra-low loss and extremely low noise. It is suitable for 10kV distribution networks at all levels. It is the preferred main model for current high-end power grid transformation, smart city projects, key industrial parks and energy-saving upgrades of high-energy-consuming enterprises.

2.Technical parameters（customizable）

• Rated voltage: 10kV on the high voltage side (± 2 × 2.5% tap), 0.4kV on the low voltage side

• Rated frequency: 50Hz

• Connection group: Dyn11

• Cooling method: ONAN (oil immersion self-cooling)

• Rated capacity: 30kVA~ 2500kVA

• Impedance voltage: 4% (standard configuration)

• Insulation class: Class A

• Protective structure: fully sealed corrugated fuel tank (no oil pillow)

• Operating environment: -25 ℃~ + 40 ℃, suitable for outdoor working conditions such as high humidity and dust

3. Main features

High energy efficiency, extreme energy saving

No-load and load losses are significantly lower than those of the S13 and S18 series, and the overall energy efficiency level has been significantly improved. Long-term operation can significantly reduce the cost of electricity for enterprises, and the return on investment cycle is short, accurately meeting the requirements of the national "double carbon" energy conservation policy.

Ultra-low noise, silent operation

The optimized core lamination structure and advanced clamping technology are used to effectively suppress magnetostrictive vibration. The noise index is better than the industry standard, and it is suitable for residential areas, schools, hospitals and other places that are sensitive to acoustic environments.

Fully sealed, maintenance-free

Innovative use of fully sealed corrugated fuel tank structure, transformer oil and air are completely isolated, to prevent oil oxidation, moisture and leakage. Realize no hanging core, no oil change, daily maintenance costs are almost zero, greatly improving operation and maintenance efficiency.

High reliability, impact resistance

The coil adopts high-strength oxygen-free copper wire and curing process, which has extremely high mechanical strength and excellent resistance to sudden short circuit. It can calmly cope with power grid voltage fluctuations and sudden load changes, and the operation safety is guaranteed.

Long life, strong weather resistance

High-quality insulating oil is matched with heat-resistant insulating materials, and the design life is more than 20 years. The surface of the fuel tank is treated with fine sandblasting and three-proof paint, which is resistant to rust and aging, and adapts to the complex outdoor climate environment.

4. Application scenarios

• National/provincial key power grid projects: new urban and rural power grids, intelligent transformation and expansion of old power grids.

• High-end commercial and public buildings: super high-rise office buildings, large shopping malls, tier 1 hospitals, university towns and cultural and tourism complexes, with both silence and high power supply reliability.

• Energy-intensive/technology-intensive enterprises: chemical plants, new energy industrial parks, data centers, and precision manufacturing plants, aiming to enhance their core competitiveness through energy conservation and cost reduction.

• Infrastructure and special power supply: power supply for expressway service areas, railway stations, desalination plants, and base stations in remote areas, reflecting its excellent performance in stable weather resistance.