Overvoltage and undervoltage relay IL 9077 Monitoring of alternating and three-phase networks for undervoltage and overvoltage, e.g. for monitoring self-generation systems according to 0100 in accordance with IEC/EN 60 255-1. Detection of overvoltage, undervoltage and phase failure. Network error diagnosis using several LEDs. Response values for overvoltage and undervoltage can be set separately. Large setting ranges 0.9 ... 1.3 UN or 0.7 ... 1.1 UN, adjustable time delay of 0.1 ... 20 s, closed-circuit principle. Without auxiliary voltage. Any phase sequence, can also be used with 1 phase. 2 changeover contacts, with IP/SP 9077 2 x 2 changeover contacts, optionally with asymmetry detection, optionally with phase sequence detection, optionally without N connection, 35 mm width
