Phase monitor SL 9087 The phase monitor IL 9087 and SL 9087 of the VARIMETER PRO series monitor undervoltage, phase failure, phase sequence, loss of neutral and phase asymmetry. The measurement is very simple and without extensive wiring, as no separate auxiliary supply is necessary. The early detection of up-coming break downs and preventive maintenance avoid expensive damages. As user you profit from the reliability and availability of your plant. Features . According to IEC/EN 60255-1 . Monitoring of phase failure - Undervoltage 3-phase 3 or 4 wire - Phase failure - Phase sequence - Loss of neutral - Phase asymmetry . Without auxiliary supply . De-energized on trip . LED indication - Supply voltage - Phase failure . 1 or 2 changeover contacts . Devices available in 2 enclosure versions: IL 9087: Depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880 SL 9087: Depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct . Width 35 mm Technical specifications Width: 35mm Enclosure design: Switch cabinet 1- / 3-phase: 3 Standard measuring range: 3/N AC 400/230 V Measuring range max.: 400 V Output contacts: 1 C/O contact, 2 C/O contacts Auxiliary voltage: Without Type: SL 9087 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: SL9087.11 3AC50/60HZ 400/230V Art. No.: 0054708