Why Choose the ABB R4M-200 Rogowski Coil?
The ABB R4M-200, order code 2CSG202150R1101, is a flexible Rogowski current transformer designed for current measurement with compatible ABB M4M network analysers. Part of ABB's Metering Accessories range, it uses Rogowski technology to provide a practical current sensing solution for energy monitoring, power measurement and electrical distribution applications.
With a large 200 mm opening diameter, the R4M-200 is particularly well suited to retrofit installations where conventional solid-core current transformers can be difficult to install. Its flexible coil can be fitted around existing conductors without requiring the conductor to be disconnected, helping simplify upgrades to established electrical installations.
The R4M-200 features a 3 m connection length and pre-wired removable terminals designed to connect directly to ABB M4M 20 Rogowski and M4M 30 Rogowski network analysers without an external integrator. The R4M range is designed for current measurement in installations up to 12 kA, while the R4M-200 has a rated primary current of 10,000 A and accuracy class 1.
Key Advantages
- Flexible Rogowski current transformer designed for energy monitoring and measurement.
- Large 200 mm opening diameter accommodates substantial conductors and busbar installations.
- Suitable for a rated primary current of 10,000 A.
- Accuracy class 1 for dependable electrical current measurement.
- Flexible construction makes the coil particularly suitable for retrofit installations.
- Pre-wired removable terminals simplify connection to compatible ABB network analysers.
- Designed for direct use with M4M 20 Rogowski and M4M 30 Rogowski without an external integrator.
Key Features
- ABB R4M Rogowski coil series.
- 200 mm coil / opening diameter.
- 3 m connection length.
- 10,000 A rated primary current.
- Accuracy class 1.
- Flexible current transformer based on Rogowski technology.
- Single-phase current converter configuration.
- One primary input.
- Pre-wired removable terminals.
- Compatible with ABB M4M 20 Rogowski and M4M 30 Rogowski network analysers.
- No external integrator required when used with compatible ABB M4M Rogowski analysers.
Flexible Current Measurement for Energy Monitoring
Rogowski coils measure alternating current using a flexible sensing loop installed around a conductor. Unlike conventional solid-core current transformers, the flexible construction allows the sensing loop to be opened and positioned around an existing cable or conductor, making Rogowski technology particularly useful when adding energy monitoring to existing electrical installations.
The ABB R4M range is designed for retrofit applications and installations with high current levels. When connected to a compatible M4M 20 Rogowski or M4M 30 Rogowski network analyser, the R4M-200 provides a direct current measurement input without requiring an external integrator, simplifying installation and helping create a complete ABB power and energy monitoring solution.
Typical Applications
- Industrial energy monitoring systems.
- Electrical switchboards and distribution panels.
- Retrofit current measurement installations.
- High-current cable and conductor monitoring.
- Power and energy analysis with ABB M4M network analysers.
- Commercial and industrial electrical distribution systems.
- Energy efficiency and load monitoring applications.
