At the Marcegaglia steel plant in Fos-sur-Mer, operating conditions are particularly demanding due to the heavy presence of fine, conductive iron dust. This environment requires several 700 kW fans operating continuously at 690 V.
For more than ten years, Marcegaglia Fos-sur-Mer has relied on Emotron FDU drives to ensure reliable, continuous operation of its fans.
The plant relies on Emotron FDU drives with closed-loop air cooling, installed in IP54 enclosures— a solution specifically designed for extreme industrial environments.
What makes the difference?
In August 2025, after years of flawless service, Marcegaglia decided it was time to retrofit and upgrade its system to the latest standard.
The project included:
The modernization was carried out by Jacques de Pijnier, CG Emotron service engineer, whose pragmatic approach was highly appreciated. Beyond the technical installation, he proposed a process improvement: the automatic start-up of a third fan when a valve is not fully closed.
The result was improved air extraction to the main stack, increased system efficiency, and enhanced reliability and durability.


Marcegaglia Fos-sur-Mer chose CG Emotron for its competitive products tailored to its industrial requirements. The continuation of this partnership, particularly through equipment modernization, reflects this ongoing commitment to quality.
If your process depends on fans, pumps, or compressors operating 24/7 under harsh conditions—from steel mills and cement plants to mining sites or chemical plants—you can rely on Emotron drives.