Why Choose the ABB R4M-80 Rogowski Coil?
The ABB R4M-80 is a flexible 80 mm Rogowski coil designed for current measurement in electrical metering and energy-monitoring applications. Supplied under ABB order code 2CSG202160R1101, it provides a practical sensing solution for conductors and busbars where conventional solid-core current transformers can be difficult to install.
Rogowski-coil technology measures alternating current without requiring a magnetic iron core. The flexible sensing loop can be opened and positioned around an existing conductor, making the R4M-80 particularly useful for retrofit projects, crowded switchboards and installations containing large cables or busbars.
With an 80 mm coil diameter, the R4M-80 provides generous clearance for monitored conductors while retaining the installation flexibility associated with Rogowski sensing. When used with compatible ABB metering equipment designed for Rogowski-coil inputs, it supports dependable current measurement for energy analysis and electrical distribution monitoring.
Key Advantages
- 80 mm flexible Rogowski coil for AC current measurement.
- Openable sensing loop simplifies installation around existing conductors.
- Well suited to retrofit applications where disconnecting primary conductors is undesirable.
- Flexible construction accommodates large cables and busbars more easily than conventional closed-core CTs.
- Rogowski technology avoids magnetic-core saturation associated with conventional iron-core current transformers.
- Suitable for ABB electrical metering and energy-monitoring applications using compatible Rogowski inputs.
- Provides galvanically isolated, non-invasive current sensing around the monitored conductor.
Key Features
- ABB R4M series Rogowski coil.
- 80 mm coil diameter.
- Flexible, openable current-sensing loop.
- Designed for alternating-current measurement.
- Suitable for installation around cables and busbars.
- Ideal for retrofit and space-constrained switchboard applications.
- No iron magnetic core.
- Designed for use with compatible ABB Rogowski-input metering equipment.
Flexible Current Measurement for Metering Applications
Rogowski coils provide an effective solution where conventional current transformers are impractical because of conductor size, restricted installation space or the need to retrofit sensing around existing wiring. The flexible R4M-80 can be opened and placed around the conductor, reducing the mechanical work required to add current measurement to an existing electrical distribution system.
Because a Rogowski coil does not use a conventional ferromagnetic core, it offers a wide measurement principle without magnetic saturation. Connected to compatible ABB metering equipment, the R4M-80 enables current information to be incorporated into energy measurement, load analysis and electrical monitoring applications.
Typical Applications
- ABB energy metering systems with compatible Rogowski inputs.
- Electrical switchboard current measurement.
- Large cable and busbar monitoring.
- Commercial and industrial energy-management systems.
- Retrofit current-monitoring installations.
- Load analysis and electrical distribution monitoring.
