S3UM 230VAC UM 500/550VAC PILZ ⍾ 837390 ⍾ S3UM230VACUM500550VAC
Voltage monitoring relay for monitoring overvoltage and undervoltage; values, and the phase sequence in 3-phase mains; 40 - 400 Hz;; Measuring voltage 500/550 V AC Width: 22.5 mm; UB 230 V AC.
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