CEEG’s Voltage Regulating Furnace Transformer for France's Saint-Gobain

In a testament to its specialized engineering capabilities, CEEG successfully delivered the HKSSPZ-13000/15 special voltage regulating furnace transformer to Saint-Gobain in 2024. Saint-Gobain, a leading French multinational specializing in high-performance and construction materials, required a bespoke power solution to ensure the stability and efficiency of its demanding manufacturing processes.

This project goes beyond a simple product delivery. It represents a comprehensive power solution that required deep technical precision and competitive value to meet the stringent demands of modern industrial production. CEEG's offering was selected over multiple competitors because of its guaranteed ability to manage the extreme operational profile of the application, followed by dedicated on-site installation and commissioning support.

The Industrial Challenge: Precision Power Under Extreme Stress

In high-temperature industrial processes, such as those used by Saint-Gobain, the furnace transformer is the single most critical component. The challenge for international manufacturers is finding a partner who can deliver a transformer capable of:

1. High Current/High Stress: Reliable operation under high currents (up to 16,000A) and continuous, significant load fluctuations.

2. Unmatched Stability: Maintaining extremely precise and stepless voltage control across a wide range (essential for material quality).

3. Durability: Withstanding local overheating and severe three-phase current imbalance (a common industry issue) without compromising safety or lifespan.

CEEG’s Engineered Solution: HKSSPZ-13000/15

CEEG engineered the HKSSPZ-13000/15 not merely as a component, but as a robust power regulating system designed to handle the harshest industrial environment and provide superior operational life cycle value.

1. Precision Voltage Control System

The transformer is equipped with an integrated fine and coarse adjustment winding structure on the high-voltage side. This complex design achieves a 63-level step output, providing the operational flexibility Saint-Gobain requires. The system delivers a low-voltage range of 532V down to 100V with a massive current capacity reaching 16,000A, ensuring optimal power input through the combined constant flux of the main transformer and the alternating flux of the series transformer.

2. Thermal Management and Durability Assurance

A major industrial pain point is managing heat and magnetic stress. CEEG utilized extensive finite element simulation analyses of the temperature and leakage magnetic fields to engineer solutions that resolved local overheating during extended overloads (tested up to 130% capacity). Furthermore, the design is specifically optimized to manage the inherent $>40\%$ imbalance in the low-voltage side three-phase current, guaranteeing safe and consistent long-term operation.

3. Advanced Structural Design and Efficiency

To ensure reliable assembly and minimize power losses, CEEG introduced several patented design features:

• Dual-Transformer Body Regulating Structure: This innovative design simplifies assembly and addresses the complexities associated with high-current windings.

• "8"-Shaped Low-Voltage Coil: Developed with specialized winding molds and lifting tools, this structure ensures robust mechanical integrity.

• Eddy Current Reduction: By implementing a same-phase reverse parallel structure and unique corner sealing measures on the low-voltage side, CEEG effectively suppressed eddy current losses caused by high currents, dramatically enhancing overall transformer efficiency and cooling.

4. Digital Integration and Remote Control

Recognizing the industry-wide push for Industry 4.0 standards, the HKSSPZ-13000/15 is fitted with the German-made MR ETOS ED intelligent control cabinet. This system features an embedded automatic voltage regulator and management system, enabling remote digital monitoring and control. This crucial feature allows Saint-Gobain to maximize operational efficiency, perform proactive diagnostics, and significantly reduce long-term maintenance costs.

Conclusion

This successful delivery to Saint-Gobain underscores CEEG's position as a technical innovator in the specialized transformer market. By combining high-precision engineering, competitive project execution, and an understanding of the client's demanding operational needs, CEEG continues to support global partners in achieving efficient, resilient, and highly controlled power operations in energy-intensive industries.