Single-phase monitoring relays

Voltage and current measuring

For the monitoring of currents and voltages in single-phase AC/DC systems, ABB’s CM range contains a wide selection of powerful and compact devices all in an only 22.5 mm wide housing. This product range includes current and voltage monitoring relays for over- and undercurrent protection, over- and undervoltage protection and phase loss monitoring – from 3 mA to 15 A and from 3 V to 600 V. Incorporating ABB’s long-term experience the CM range provides highest safety and reliability for your electric installation.

Main benefits

  • Safe and reliable voltage and current monitoring
  • Easy Connect Technology widthstands highest vibrations
  • Easy to adjust via front face potentiometer

Main features

  • Over-/undercurrent monitoring
  • Over-/undervoltage monitoring
  • Measuring of AC/DC signals
  • TRMS measuring principle
  • Window monitoring (upper and lower threshold at the same time)
  • Easy Connect Technology with push-in terminals
  • Double-chamber cage connection terminals

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