Multifunktion 3 phase monitor CM-MPS, width 22,5mm, monitoring of phase sequence, phase loss, over and undervoltage, unbalance (adjustable 2-15%), measuring range L1-L2-L3=3x300-500VAC 50/60Hz, ON or OFF delay adjustable 0.05-10s, supplied by measuring circuit, 2 c/o (closed circuit principle)