Why Choose the ABB CMS-120CA 80 A Open-Core Current Sensor?
The ABB CMS-120CA is a compact open-core current sensor designed for branch-circuit monitoring and energy-management applications. As part of the ABB CMS Circuit Monitoring System, this 18 mm sensor provides accurate current measurement for individual electrical circuits and integrates with compatible ABB InSite monitoring equipment.
Designed for universal cable mounting, the CMS-120CA uses an open-core construction that enables convenient installation around existing conductors. Cable-tie mounting makes the sensor independent of a specific protective-device platform, providing a flexible solution for new installations, upgrades and retrofit monitoring within electrical distribution equipment.
With a measurement range of 0.1–80 A, accuracy class 1 and an InSite bus flat-cable interface, the CMS-120CA provides dependable branch-level current measurement while simplifying system wiring. ABB order code 2CCA880220R0001 identifies this 80 A cable-mounted open-core sensor.
Key Advantages
- Compact 80 A open-core current sensor for branch-circuit monitoring.
- Wide 0.1–80 A measurement range for individual electrical loads.
- Open-core construction supports convenient retrofit installation around existing conductors.
- Universal cable-tie mounting provides flexibility across different electrical installations.
- Accuracy class 1 with current accuracy of ≤±1% full scale.
- Integrates with compatible ABB monitoring systems through the InSite bus flat-cable interface.
Key Features
- ABB CMS Circuit Monitoring System sensor.
- 80 A maximum measurement current.
- 0.1–80 A measurement range.
- 18 mm open-core sensor construction.
- Accuracy class 1.
- Current accuracy of ≤±1% full scale.
- InSite bus flat-cable interface.
- Universal cable mounting using cable ties.
- Suitable for retrofit and new-build circuit-monitoring applications.
- Operating ambient temperature range of -25 to +70 °C.
Flexible Retrofit Circuit Monitoring
The ABB CMS-120CA enables individual electrical circuits to be incorporated into a wider energy-monitoring system without requiring a sensor mounting arrangement specific to the associated protective device. Detailed branch-level current information can help operators analyse electrical consumption, supervise loads and identify changes in circuit behaviour.
Its open-core construction and universal cable-tie mounting are particularly useful for retrofit applications because the sensor can be positioned around an existing conductor. Combined with ABB's InSite flat-cable architecture, multiple CMS sensors can be connected efficiently while minimising additional wiring inside the distribution equipment.
Typical Applications
- ABB CMS and InSite energy-monitoring systems.
- Branch-circuit current monitoring.
- Retrofit energy-monitoring projects.
- Electrical distribution boards and switchboards.
- Commercial building energy monitoring.
- Industrial electrical load monitoring.
- Data centre and critical-power monitoring.
- Energy-consumption and load analysis.
