SUPERVISOR RELAY ; SYSTEM: THREE-PHASE ; POWER SUPPLY: 160-690 VAC ;# VARIABLE: OVERVOLTAGE AND UNDERVOLTAGE ;, RANGE: 160-690V ; CONTACT TO, U# XILIARY: 2 CO ; ADJUSTMENT: HYSTERESIS 1-20 V ; ADDITIONAL FEATURES: DIGITAL VOLTAGE MONITORING;, COMMERCIAL REFERENCE: SIEMEN, S# 3UG4617-1CR20; NOTE: FOEN PANEL APPLICATION