Socomec has mastered Rogowski technology for over three decades and continues to refine both materials and manufacturing processes. The result is sensors that deliver high accuracy, long-term stability, and consistent measurements—regardless of how the coil is placed around the primary conductor or the environment in which it is used.
What Makes Socomec’s Rogowski Technology Unique?
At the core is a smart, multi-layered design that protects, stabilizes, and refines the signal. Inside the coil, copper and resin work together to provide flexibility and long durability—you can handle the sensor without compromising precision. A double winding increases sensitivity to magnetic fields and improves performance, while an initial insulating layer enhances dielectric properties and permanently stabilizes the winding.
The coil is also protected by a special shielding that makes it immune to external electronic interference. Finally, a second insulating layer encapsulates the entire sensor for better dust resistance and further improved dielectric properties. Together, these seven layers create a durable, stable, and highly accurate measurement chain from field to instrument.
The Strategy Behind the Performance: A Combination of Hardware and Technology
Socomec’s strategy is based on several well-balanced technological levers where hardware optimization meets advanced digital signal processing:
Optimized Internal Coil Geometry
- The accuracy of a Rogowski sensor directly depends on how uniform and controlled the winding is. Socomec’s proprietary winding machines are unique in the world, automatically adjusting winding tension based on production environment parameters. This adaptability ensures consistent coil geometry—a key to repeatable measurement precision across units and over time.
Compensated Winding in the Junction Box
- The junction box is where both ends of the coil winding meet and the magnetic field loop closes. To allow mechanical opening of the sensor, the winding constant is interrupted here—normally causing a natural voltage drop (“air gap effect”). Socomec solves this with a calibrated compensation loop in the junction box. This predictability not only dampens the voltage drop but effectively “levels it out,” preserving measurement continuity and ensuring higher accuracy even at the junction.
Specific Shielding to Ensure Measurement Data
- Rogowski sensors are inherently diamagnetic and can be affected by external magnetic fields, such as from a nearby conductor. Socomec uses specially designed electromagnetic shielding that significantly reduces interference. In practice, this means more stable measurements in real-world installations, where wiring, enclosures, and adjacent current paths might otherwise cause variations.
What Does This Mean for You as a User?
- High and repeatable accuracy—even near the junction box and regardless of installation.
- Long-term stability—material and process choices that preserve performance in the field.
- Interference resilience in real environments—shielding and algorithms that reduce the impact of current fields and electrical noise.
- Easy to install and handle—flexible, robust design without compromising precision.
Summary
By combining a proven seven-layer design, unique winding technology, compensation winding in the junction box, special shielding, and built-in correction algorithms, Socomec delivers Rogowski sensors that are as accurate as they are robust. That’s why they perform equally well in laboratories and demanding industrial applications—with measurement values you can trust, year after year.
