Why Choose the ABB CMS-122DR Open-Core Current Sensor?
The ABB CMS-122DR is a compact 20 A open-core current sensor designed for branch-circuit current measurement within ABB CMS and InSite energy monitoring systems. Supplied under ABB order code 2CCA880242R0001, the sensor combines an 18 mm open-core design with DIN-rail mounting for convenient installation in electrical distribution boards, switchboards and industrial control panels.
Its open-core construction allows the CMS-122DR to be fitted around an existing conductor, simplifying retrofit installations and extensions to existing monitoring systems. The sensor communicates through the InSite bus flat-cable interface, providing straightforward integration with compatible ABB control units including the SCU100 and SCU200.
With a rated primary current of 20 A, a measuring range of 0.1–20 A and current accuracy of ≤±1% full scale, the CMS-122DR provides dependable branch-level current measurement. Its compact dimensions and DIN-rail mounting format make it particularly suitable for multi-channel monitoring where panel space is limited.
Key Advantages
- 20 A open-core current sensor designed for branch-circuit monitoring.
- 0.1–20 A measuring range for monitoring individual electrical loads.
- Open-core construction simplifies installation around existing conductors.
- 18 mm sensor format suitable for universal DIN-rail applications.
- ≤±1% full-scale current accuracy for reliable monitoring data.
- DIN-rail mounting provides convenient installation inside electrical panels.
- Integrated InSite bus flat-cable interface simplifies connection to compatible ABB monitoring equipment.
Key Features
- ABB CMS current monitoring sensor.
- 20 A rated primary current.
- 0.1–20 A measuring range.
- 18 mm open-core sensor design.
- DIN-rail mounting for universal-use applications.
- ≤±1% full-scale current accuracy.
- InSite bus flat-cable communication interface.
- Compatible with ABB SCU100 and SCU200 control units.
- 0.18 W power consumption at rated load.
- Operating ambient temperature range of −25 to +70 °C.
Reliable Branch-Circuit Current Monitoring
Current sensors such as the ABB CMS-122DR allow individual electrical circuits to be measured within a multi-channel monitoring system. Branch-level current data gives electrical engineers and facility operators greater visibility of individual loads, supporting energy-efficiency analysis, load monitoring and detailed supervision of electrical distribution systems.
The open-core construction is particularly useful when adding monitoring to an existing installation because the sensor can be fitted around an installed conductor. Combined with DIN-rail mounting, compact dimensions and ABB InSite bus connectivity, the CMS-122DR provides a flexible solution for extending current monitoring across distribution boards and industrial control panels.
Typical Applications
- Branch-circuit current monitoring in electrical distribution boards.
- ABB CMS and InSite energy monitoring systems.
- Commercial and industrial energy-management installations.
- Retrofit monitoring of existing electrical circuits.
- Electrical load and energy-consumption analysis.
- Multi-channel monitoring inside switchboards and control panels.
