Single-phase monitoring relays

Voltage and current measuring

ABB’s CM range offers a wide selection of powerful, compact devices for the monitoring of currents and voltages in single-phase AC/DC systems. All come in a housing that is just 22.5 mm wide. 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. ABB’s CM range gives your electric installation the highest safety and reliability.

Main benefits

• Safe and reliable voltage and current monitoring
• Easy Connect Technology push-in terminals
• Withstands highest vibrations
• Easy adjustments via front potentiometer

Main features

• Over-/undercurrent monitoring
• Over-/undervoltage monitoring
• AC/DC signal measurements
• True RMS 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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