PILZ S3UM 230VAC UM 415/460VAC – 837380 | JUAL PILZ S3UM 230VAC UM 415/460VAC – 837380 – Voltage monitoring relay, to monitor overvoltage and undervoltage values, and the phase sequence in 3-phase supplies, 40 -400 Hz, measuring voltage 415/460 V AC, width 22.5 mm, UB = 230 V AC.