The 3UG4512-1AR20 is a compact line monitoring relay from Siemens designed to monitor 3-phase power systems. It detects phase imbalance (≥10%), phase failure, and incorrect phase sequence, ensuring protection of motors and equipment.
Phase imbalance detection: ≥10%
Monitors phase loss, sequence, and asymmetry
Output Contact: 1 CO (Changeover Contact)
Mounting: DIN rail
Wide voltage range: 160–690V AC
LED indicators for status monitoring
Compact design suitable for control panels