step-up transformer

1. Product Introduction

The 35 kV series oil-immersed transformer is an ultra-high-efficiency product that currently represents the best transformer efficiency for 35 kV voltage levels. Equipped with ultra-high permeability and low-loss cold-rolled silicon steel sheets, oxygen-free copper windings, optimized magnetic circuit design, and fully sealed, corrosion-resistant heat dissipation systems, this product achieves comprehensive improvements in loss control, operational noise reduction, mechanical strength, and service life. It serves as a key energy-saving solution for high-end applications, including power grid upgrades, renewable energy integration, industrial power supply, data centers, and urban infrastructure projects.

2. Technical specifications (customizable)

Product type: Three-phase double or three-phase three-winding Rated capacity: 50 kVA – 63,000 kVA Voltage Regulation mode: On-load tap changing, off-circuit tap changing, or motorized off-circuit voltage on the high-voltage side Cooling mode: ONAN / ONAF Connection symbol: Dyn11 / YNd11 (industry standard) Energy efficiency level: High-efficiency energy-saving transformer

Core material configuration Core: High-permeability grain-oriented silicon steel sheet, with low no-load loss and low noise level Windings: High-purity oxygen-free copper windings, with high mechanical strength and excellent short-circuit resistance Oil tank: Sealed structure, leak-proof, moisture-proof, and long-term maintenance-free

3. Key features

1. Ultra-low noise and environmental friendliness: The use of multi-stage iron cores and vibration structures significantly exceeds national standards, making it suitable for high-silence environments such as hospitals, schools, residential areas, and office buildings.

Sealed structure with oil-free bearing design. Vacuum oil injection technology ensures that the insulating oil remains isolated from air, providing oxidation resistance, moisture protection, and leak prevention. This eliminates the need for core lifting and daily maintenance, resulting in extremely low operation and maintenance costs.

Strong short-circuit resistance and high reliability, with high mechanical strength of windings and a stable insulation structure, capable of withstanding grid surges, load and voltage fluctuations, ensuring safe and stable operation with a low failure rate.

Reduced temperature rise and extended service life: The optimized heat dissipation design provides excellent temperature rise control, effectively delaying insulation aging. The equipment can operate stably under full load for extended periods, ensuring a longer service life.

High environmental adaptability: The oil tank features corrosion-resistant and weather-resistant properties, ensuring long-term reliable operation in harsh environments such as outdoor substations, container substations, mountainous areas, coastal regions, and high-altitude areas.

4. Application scenarios

• Step-up transformers for wind farms, photovoltaic power stations, and energy storage facilities • High-load power supply solutions for data centers, IDC facilities, industrial parks, high-end manufacturing plants, mining enterprises, metallurgical and chemical plants • Public buildings including hospitals, schools, commercial complexes, luxury residential buildings, and office towers • Large-scale infrastructure projects such as railways, airports, highways, water conservation projects, and municipal facilities • Compact urban substations, containerized substations, and open-tower power supply systems