Relay Type 70.61 for phase sequence and phase failure monitoring for three-phase networks (208 … 480 V). Features: Universal use (systems with UN from 208 V to 480 V, 50/60 Hz) Detects phase failure error even in the presence of regenerated voltages Positive safety logic (the output relay contact opens in case of error detection) 1 changeover output contacts rated 6 A Modular, 17.5mm wide 35 mm rail mounting (EN 60715) European patent filed for the innovative principle underlying the 3-phase monitoring and error detection system