The Single-functional current monitoring relay is designed for over- and undercurrent monitoring. It uses a RMS measuring principle to measure DC and AC currents. The relay has 3 measuring ranges: 0.3-1.5 A, 1-5 A, and 3-15 A. It operates based on the open-circuit principle and requires a control supply voltage of 110-130 VAC. The relay features a 1 CO (SPDT) output contact rated at 250 V/4 A. It also has double-chamber cage connection terminals for easy installation.