The Three Phase Monitoring Relay is designed for phase failure detection, phase sequence monitoring, and over/under voltage monitoring. It has a measuring range of 160-300 VAC (L-L) and a start-up delay of 200ms. The tripping delay can be set to either 0s or within the range of 0.1-30s (On or OFF). This relay features two changeover contact SPDT with a rating of 4 A/250V. The control supply voltage is 1 and it has a width of 22.5 mm modules.