Support transformer

1. Product Introduction

The 35 kV series oil-immersed power transformers are primary energy-efficient transformers for 35 kV voltage levels. Equipped with high-quality silicon steel sheets, a fully sealed structure, and proven manufacturing processes, these transformers exhibit lower losses, reduced noise levels, and enhanced operational stability compared to the S9 and S10 series models. Primarily designed for 35 kV power transmission and distribution systems, they perform voltage conversion and energy distribution while ensuring energy efficiency, reliability, maintenance-free operation, and an extended service life. Widely used in power grids, industrial/mining applications, infrastructure projects, and renewable energy sectors, they are currently the most common energy-saving solution in 35 kV distribution systems.

2. Technical specifications (customizable)

Energy efficiency class: High-efficiency and energy-saving transformer • Connection group: YNd11, Dyn11 • Cooling method: ONAN oil-immersed self-cooling • Capacity range: 50KVA-63000KVA • Impedance voltage: 6.5–8% (per capacity) • Insulation class: Class A • Protective structure: Fully sealed corrugated oil tank with plate-type radiator • Operating environment: -30°C to +40°C

3. Key features

1. Energy-efficient design with low operating costs: significantly reduced no-load losses compared to S10 models, delivering outstanding energy efficiency performance. Long-term operation ensures energy savings and rapid return on investment, fully complying with national energy-saving standards.

Low-noise operation: The iron core uses an optimized magnetic circuit design and multi-stage lamination technology, ensuring minimal vibration and low noise levels, making it suitable for quiet places such as residential areas, schools, and hospitals.

Fully sealed, maintenance-free design with oil-free bearings: The fully sealed structure prevents the insulating oil from contacting the air, reducing oxidation and moisture absorption. This eliminates core suspension and frequent maintenance, lowering operational and technical costs.

Strong short-circuit resistance, high mechanical strength of the winding, reliable insulation, capable of withstanding grid surges, load fluctuations, and short circuits, ensuring safe and stable operation.

High reliability and long service life with a rational heat dissipation system, corrosion-resistant and weather-resistant properties, robust overall construction, and a service life of over 20 years.

Highly adaptable and easy to install, suitable for indoor and outdoor use, as well as for transformer substations and power conversion stations, capable of operating in various conditions including high-altitude areas, humid environments, dusty conditions, and coastal regions.

4. Application scenarios

• New construction, modernization, and energy-saving upgrades of urban/rural 35 kV power grids • Power supply for large factories, mines, metallurgical plants, chemical enterprises, and industrial parks • Voltage boosting systems for wind power, photovoltaic power stations, and energy storage stations • Power supply for hospitals, schools, commercial complexes, and high-rise buildings • Power supply for water conservancy projects, railways, highways, and municipal infrastructure • Main transformers in substations, container substations, and outdoor tower distribution systems