Why Choose the ABB CMS-122FH 20 A Open-Core Current Sensor?
The ABB CMS-122FH is a compact 18 mm open-core current sensor designed for branch-circuit monitoring and energy-management applications. As part of the ABB CMS Circuit Monitoring System, it provides detailed current measurement for individual electrical circuits and connects to compatible ABB InSite monitoring equipment through the system's flat-cable bus.
The CMS-122FH is specifically designed for the retrofit of ABB E90 fuseholders up to 1000 V DC. Its open-core construction allows the sensor to be fitted around an existing conductor without requiring the conductor to be passed through a permanently closed sensing core, making it particularly useful when adding circuit monitoring to existing E90 installations.
With a measurement range of 0.1–20 A, accuracy class 1 and an InSite bus flat-cable interface, the CMS-122FH provides a practical solution for detailed monitoring of lower-current circuits. ABB order code 2CCA880217R0001 identifies this 20 A E90 retrofit open-core sensor.
Key Advantages
- Compact 20 A open-core current sensor for detailed branch-circuit monitoring.
- Designed specifically for retrofit installation with ABB E90 fuseholders.
- Wide 0.1–20 A measurement range for lower-current electrical loads.
- Open-core construction simplifies installation around existing conductors.
- Accuracy class 1 supports dependable current monitoring.
- Integrates with compatible ABB monitoring systems through the InSite bus flat-cable interface.
Key Features
- ABB CMS Circuit Monitoring System sensor.
- 20 A maximum measurement current.
- 0.1–20 A measurement range.
- 18 mm open-core sensor construction.
- Accuracy class 1.
- InSite bus flat-cable interface.
- Designed for retrofit of E90 fuseholders.
- Suitable for E90 fuseholder applications up to 1000 V DC.
- Surface mounting configuration.
- Compact format for circuit monitoring within electrical distribution equipment.
Practical Retrofit Monitoring for E90 Fuseholders
The ABB CMS-122FH enables individual circuits associated with E90 fuseholders to be incorporated into a wider energy-monitoring system. Branch-level current data can provide greater visibility of electrical loads, helping operators analyse consumption, supervise equipment and identify changes in circuit behaviour.
Its open-core construction is particularly valuable in retrofit projects because the sensor can be installed around an existing conductor. Combined with ABB's InSite flat-cable interface, this allows multiple monitored circuits to be connected efficiently to compatible system components while minimising additional wiring inside the distribution equipment.
Typical Applications
- ABB E90 fuseholder retrofit monitoring.
- ABB CMS and InSite energy-monitoring systems.
- Branch-circuit current monitoring.
- Electrical distribution boards and switchboards.
- Commercial building energy monitoring.
- Industrial electrical load monitoring.
- DC distribution and control installations using compatible E90 fuseholders.
- Energy-consumption and load analysis.
