The three-phase monitoring relay is designed to monitor various phase parameters such as phase failure, phase sequence over/undervoltage, and phase unbalance. It has a measuring range of 360 to 440 VAC (L-L) and operates with a rated control supply voltage of 400 VAC. This relay features 2 CO (SPDT) outputs and allows for adjustable tripping delay from instantaneous to 30 seconds (0, 0.1-30 s). It also comes with double-chamber cage connection terminals for easy installation.