Over- and undervoltage relay SL 9077 Monitoring of three-phase voltage systems to identify overvoltage and undervoltage, e.g. to monitor in-house generation equipment in accordance with VDE 0100. Features . According to IEC/EN 60255-1 . Identification of overvoltage, undervoltage and phase failure . With asymmetry identification as an option . Mains fault diagnostics with a number of LEDs . Setting values for overvoltage and undervoltage can be set separately . Large Setting Ranges 0.9 ... 1.3 UN and 0.7 ... 1.1 UN . Time delay variable between 0.1 ... 20 s . Closed circuit operation . No auxiliary voltage . Independant of phase sequence . As option with phase sequence detection . Single-phase connection possible . Optionally for 3P3W Systems . 2 changeover contacts, at IP/SP 9077 2 x 2 changeover contacts . Devices available in 2 enclosure versions: I-model: depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43 880 S-model: depth 98 mm, with terminals at the top for cabinetswith mounting plate and cable duct . IL 9077, SL 9077: width 35 mm IP 9077, SP 9077: width 70 mm Technical specifications Width: 35mm Operate delay: Yes Enclosure design: Switch cabinet 1- / 3-phase: 3, 1 Standard measuring range: 3/N AC 400/230 V Measuring range max.: 500 V Output contacts: 2 C/O contacts Auxiliary voltage: Without Type: SL 9077 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: SL9077.12/001 3AC115V 0,1-20S Art. No.: 0050636