The ABB CM-ESS.2 voltage monitoring relay provides robust monitoring of AC and DC voltages, ensuring system stability and protection. This relay detects phase loss and offers configurable over- or undervoltage monitoring with adjustable hysteresis. It incorporates a TRMS measuring principle, multiple measuring ranges, and a user-friendly interface for precise adjustments. The CM-ESS.2 is suitable for applications requiring reliable voltage monitoring and protection in industrial environments, offering features like tool-free mounting on DIN rails and a wide range of approvals.