a step down transformer

1. product introduction

The 35kV S13 series oil-immersed distribution transformer is a high-end energy-saving product with national first-class energy efficiency. Compared with the traditional S11 and S10 series, its no-load and load loss are greatly optimized, and the technical indicators lead the industry standard. The product adopts high-quality cold-rolled oriented silicon steel sheet, high-conductivity oxygen-free copper windings and fully sealed corrugated fuel tank structure, which has the core advantages of silent operation, high reliability and long life while ensuring extreme energy saving. Suitable for 35kV distribution networks at all levels, it is the benchmark energy-saving equipment for high-end power grid transformation, intelligent parks, people's livelihood buildings and places with strict energy consumption and environmental requirements.

2.Technical parameters（customizable）

• Rated voltage: 35kV on the high voltage side (± 2 × 2.5% tap), 10kV/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% or 6.3% (according to capacity specification)

• Insulation class: Class A

• Noise level: ≤ 65dB (significantly lower than S11 series)

• Operating environment: -25 ℃~ + 55 ℃, suitable for severe outdoor working conditions such as high humidity, high salt spray, dust, etc

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

3. Main features

1. First-class energy efficiency, extreme energy saving

Using three-dimensional three-dimensional coil iron core or high-quality laminated iron core process, the no-load loss is reduced by more than 30% compared with the S11 series, and the load loss is reduced synchronously. Long-term operation can greatly reduce the comprehensive electricity cost, and the investment return period is short, which is in line with the national "double carbon" energy conservation policy.

2. Ultra-low noise, green and environmentally friendly

By optimizing the magnetic circuit design and precision clamping process, the operating noise is reduced by 2-4dB compared with the S11 series. Even in densely populated residential areas, schools, hospitals and other places, "silent operation" can be achieved, which greatly enhances environmental friendliness.

3. Fully sealed, maintenance-free

Adopt vacuum oil injection + fully sealed corrugated fuel tank technology to completely isolate oil from air contact, prevent oxidation, moisture and leakage. Realize no hanging core, no oil change, extremely low maintenance cost throughout the life cycle, and high equipment availability.

4. Anti-short circuit, high reliability

The coil adopts high-strength oxygen-free copper wire and vacuum impregnation process, which has extremely high mechanical strength and excellent resistance to sudden short circuit. It can calmly cope with severe fluctuations in power grid voltage and load shocks, and operates safely and stably.

5. Lower temperature rise, long lifespan

With high-quality insulating materials and fine craftsmanship, the temperature rise is lower. The average temperature rise and fall is lower than that of traditional models, effectively delaying insulation aging. The design life can reach more than 30 years, and it has the ability to overload by 20% in a short time.

6. Compact size, flexible installation

Structure optimization, lighter weight, smaller volume. Suitable for outdoor bench, box substation, indoor distribution room and other installation scenarios, lower transportation and construction costs.

4. Application scenarios

1. High-end people's livelihood and public buildings

• Large residential communities, tier 1 hospitals, colleges and universities, high-end office buildings, large shopping malls.

Key livelihood projects that are sensitive to noise and require extremely high power supply reliability.

2. National/provincial power grid transformation

• Urban and rural 35kV power grids are newly built, old power grids are intelligently upgraded, and distribution network grids are strengthened.

• Build a regional energy-saving power supply demonstration project.

3. High-end industrial parks and enterprises

• New energy industrial parks, precision manufacturing parks, data center facilities, and high-tech enterprises.

• Pursue high-value power consumption scenarios with low loss and low operation and maintenance costs.

4. Infrastructure and special power supply

• Expressway service areas, railway stations, water conservancy hubs, cultural and tourism scenic spots, and coastal ports.

• Special power supply suitable for harsh environments such as high corrosion and high altitude.