Three-phase   voltage monitor   without   auxiliary   voltage;   Undervoltage detection   of 1 , 2, 3  phases;   Setting range   285-360   V ;  Phase failure detection   of 1 ,  2 ,  3   phases ;  Response time   35   ms ;  Closed-circuit principle ;  Contacts 2   changer ;  Nominal   voltage 3   x   400 V AC   50-60   Hz ;  Screw clamps ;  Mounting:   DIN rail ;  Width   45   mm