Multifunctional Single/Three phase monitoring relay Monitor Phase loss & undervolatge L1,L2,L3=380-440 VAC L-N=220-240 VAC, 380..440 VAC (L-L), 220-240 VAC(L-N) Measuring range, Start-up delay: 500ms Tripping delay: 150ms Time range, 1 N/O contact, 380..440 VAC (L-L) L-N Control supply voltage 1 Width 22.5 mm modules