control transformer

1.Product Introduction 

The 35kV S10 series oil-immersed distribution transformer represents an energy-efficient replacement product. Compared to the traditional S9 series, it demonstrates significant reductions in both no-load and load losses. The product features high-quality cold-rolled oriented silicon steel core sheets, high-conductivity oxygen-free copper windings, and a fully sealed structural design, ensuring mature overall technology and stable operation.

This model is designed for 35kV distribution networks at all voltage levels, enabling stable power conversion between 35kV and 10kV/0.4kV. Featuring low loss, low noise, high reliability, and long service life, it serves as the preferred equipment for urban-rural power grid upgrades, industrial and mining enterprise power supply, and large-scale infrastructure supporting power systems.

2. Technical Specifications（customizable）

 • Rated Voltage: High voltage 35kV (±5% tap), low voltage 10kV/0.4kV • Rated Frequency: 50Hz • Connection Group: Dyn11 • Cooling Method: ONAN (oil-immersed self-cooling) • Rated Capacity: 30kVA to 6300kVA • Impedance Voltage: 4% or 6.3% (depending on capacity specifications) • Insulation Class: Grade A • Noise Level: ≤65dB (varies with capacity) • Operating Environment: -30℃ to +40℃, suitable for high-humidity and dusty outdoor conditions • Protective Structure: Fully sealed corrugated oil tank

 3. Key Features 

1. Reduced Losses for Significant Energy Savings The S10 series demonstrates approximately 10%-20% lower no-load losses compared to the S9 series, with optimized load loss performance. This ensures substantial long-term energy savings, effectively reducing users' electricity costs.

Stable operation with strong short-circuit resistance: The core employs high-quality silicon steel sheets and optimized laminating processes, resulting in a robust coil structure with high mechanical strength. It can withstand grid surges and load fluctuations, ensuring high operational safety.

Lower noise level and environmentally friendly magnetic circuit design optimization result in reduced operating noise compared to traditional models, making it suitable for noise-sensitive environments such as residential areas, schools, and hospitals.

Fully sealed and maintenance-free design with a fully sealed corrugated oil tank structure effectively prevents oil oxidation and moisture absorption, eliminating the need for core lifting or oil replacement while maintaining extremely low long-term maintenance costs.

Long service life and high reliability: High-quality insulating materials combined with precision manufacturing processes enable equipment to achieve a lifespan exceeding 20 years, with low overall failure rates, making it suitable for long-term continuous power supply scenarios.

Easy installation and strong adaptability with compact size and moderate weight, suitable for various installation environments such as outdoor platforms, distribution rooms, and box-type substations. It exhibits excellent weather resistance and is applicable to complex outdoor operating conditions.

4. Application Scenarios

 • New construction and renovation of urban-rural power grids are applicable to 35kV county-level grids and township grid upgrades, providing reliable medium-to-high voltage power conversion.

• Industrial and mining enterprises, along with industrial parks, receive primary power supply and distribution services from these facilities, featuring high stability and capable of meeting continuous power demands under heavy loads.

• Large-scale infrastructure is utilized for power supply support in highway service areas, railway stations, water conservancy hubs, university towns, and cultural tourism projects.

• Commercial and public buildings are suitable for large shopping centers, office buildings, hospitals, hotels, and other locations with high requirements for power supply reliability.

• Rural power grids and remote areas widely utilize this technology for grid construction and power supply systems in rural and isolated regions due to its high cost-effectiveness and easy maintenance characteristics.