Leveraging our integrated manufacturing and international trade capabilities, we successfully completed the customized production, comprehensive factory testing and on-time delivery of one SFSZ-40000kVA 115/38.5/11kV three-phase oil-immersed all-copper power transformer within only two months.

The transformer was specially manufactured for the DTEK ODESA GRIDS substation project in Ukraine. Designed to enhance regional power transmission efficiency and strengthen grid reliability, this project demonstrates our ability to provide customized transformer solutions with rapid delivery, strict quality control and compliance with international power standards.

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I. Project Background & Core Customer Pain Points

As Ukraine continues to modernize and reinforce its electrical infrastructure, substations play a vital role in ensuring stable electricity transmission and supporting the recovery of regional power networks. DTEK ODESA GRIDS required a high-performance transformer capable of improving substation capacity while maintaining reliable long-term operation.

The customer faced several important challenges during the project:

1. Reliable Power Supply for Critical Grid Infrastructure

The transformer would become a key component of the local transmission network, requiring high operational reliability and continuous performance under varying load conditions.

2. Tight Project Schedule

To accelerate substation construction and commissioning, the customer requested the entire process—from technical confirmation and customized manufacturing to factory testing and shipment—to be completed within only two months.

3. High Energy Efficiency

Long-term grid operation demanded a low-loss transformer capable of reducing operating costs while improving overall transmission efficiency.

4. Compliance with International Standards

The equipment had to fully comply with IEC standards and satisfy the technical requirements of overseas utility projects, ensuring smooth installation and reliable long-term service.

To address these requirements, our engineering team developed a customized transformer solution optimized for transmission network applications and international utility standards.

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II. Customized Technical Advantages for Grid Transmission Projects

The SFSZ-40000kVA 115/38.5/11kV transformer was specially designed for modern power transmission systems, combining high efficiency, stable performance and dependable operation.

1. High-capacity Voltage Transformation

Rated at 40MVA, the transformer efficiently converts transmission voltage while providing stable power supply for regional substations and distribution networks.

2. Premium All-Copper Windings

The transformer adopts high-purity copper conductors with excellent electrical conductivity, outstanding short-circuit strength and superior thermal stability. The all-copper winding structure improves reliability while extending service life.

3. Low-loss Core Design

High-quality grain-oriented silicon steel combined with optimized magnetic circuit design significantly reduces no-load and load losses, improving overall energy efficiency and lowering operating expenses.

4. Intelligent Voltage Regulation

The SFSZ series transformer features an on-load tap changer (OLTC), allowing voltage adjustment during operation to maintain stable output voltage despite fluctuations in grid demand, thereby improving power quality and system stability.

5. Compliance with International Standards

The transformer is designed and manufactured in strict accordance with IEC 60076 standards. Every production process follows rigorous quality control procedures to ensure excellent electrical performance and long-term operational reliability.

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III. Industry & Trade Integration Strength: 2-month Rapid Delivery & Strict Quality Assurance

International utility projects require not only high-quality products but also reliable delivery schedules. Supported by our integrated manufacturing system, experienced engineering team and mature export services, we completed the entire production cycle within only two months.

Comprehensive Factory Testing

Prior to shipment, the transformer successfully passed all routine and type tests, including transformer ratio testing, winding resistance measurement, insulation withstand testing, induced voltage testing, no-load and load loss measurement, partial discharge inspection and overall operational verification.

Integrated Manufacturing Advantages

From silicon steel core processing and copper winding production to vacuum drying, final assembly and factory testing, every production stage is completed within our own manufacturing facilities, ensuring consistent quality and rapid project execution.

Secure Export Packaging

Considering long-distance international transportation, the transformer was protected using reinforced export packaging with moisture-proof materials, anti-vibration supports and secure fastening measures, ensuring safe arrival at the project site.

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IV. Project Value & Supporting Ukraine's Power Grid Modernization

After commissioning, the SFSZ-40000kVA transformer will significantly improve the operating capacity and reliability of the DTEK ODESA GRIDS substation, providing stable electricity transmission for residential, commercial and industrial consumers.

Its high-efficiency design helps reduce transmission losses and long-term operating costs while enhancing the stability and flexibility of the regional power network.

The successful completion of this project further demonstrates our capability to deliver customized transformer solutions for utility companies and power infrastructure projects worldwide. With extensive experience in international markets, we continue to provide high-quality transformers, rapid delivery and comprehensive technical support to customers across Europe, Asia, Africa and beyond.

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