ABB CM-SRS.21P Current Monitoring Relay 3-30mA 10-100mA 0.1-1A 24-240VAC/DC 2CO SPDT 4A

This single-functional current monitoring relay is designed for over- and undercurrent monitoring. It uses a RMS measuring principle to accurately measure DC and AC currents. The relay has 3 measuring ranges: 3-30 mA, 10-100 mA, and 0.1-1 A. It operates according to the open-circuit principle and can be powered by a control supply voltage of 24-240 VAC/DC. The relay features 2 CO (SPDT) output contacts that are rated at 250 V/4 A. The tripping delay can be adjusted from instantaneous to a maximum of 30 s (0, 0.1-30 s). It also has push-in terminals for easy installation.