Monitoring relay, Features: Undervoltage/overvoltage protection incl. Neutral conductor failure for 3-phase systems, True RMS measurement, Time functions: Power ON/Trip time/Recovery time delay (0-300 s), Additional features: Alarm display; Locking; Reset, 3-digit LCD with backlight, Built-in current transformer, Adjustable switching hysteresis, Alarm output: 2 x NO/NC, Supply voltage: 85-270 V AC/DC, Dimensions: 35 x 90 x 70.5 mm, DIN-rail mounting, Terminal connection