Siemens SIRIUS 3UG5 Phase Monitoring Relay 3UG5511-1AR20

The Siemens 3UG5511-1AR20 is a high-quality phase monitoring relay from the SIRIUS 3UG5 series, designed for reliable phase sequence monitoring in three-phase systems. This device ensures that the correct phase rotation is maintained, protecting sensitive equipment from damage due to incorrect phase order. With a wide measuring voltage range of 160-690 V AC and a compact DIN rail mount design, it is ideal for industrial and commercial applications.

Advantages

Ensures operational safety by monitoring phase sequence, preventing motor reversal and equipment damage. Automatic reset behavior reduces downtime. Robust design with IP20 protection and wide temperature range (-25 to +60 °C) ensures reliable performance in harsh environments.

Suitable for

• Industrial motor control panels
• HVAC systems
• Pump and compressor monitoring
• Conveyor systems
• Any three-phase application requiring phase sequence verification

Key specifications

• Product Type: Phase Monitoring Relay
• Series: SIRIUS 3UG5
• Monitoring Function: Phase sequence
• Number of Phases: 3-phase
• Measuring Voltage Range (AC): 160 - 690 V AC
• Frequency Range: 50/60 Hz
• Output Contact Type: 1 Changeover (CO) contact
• Rated Operating Current (AC-15, 230V): 3 A
• Rated Operating Current (DC-13, 24V): 1 A
• Mounting Type: DIN rail
• Electrical Connection: Screw-type terminals
• Operating Temperature Range: -25 to +60 °C
• Storage Temperature Range: -40 to +85 °C
• Protection Class (IP): IP20
• Overvoltage Category: III
• Pollution Degree: 3
• Response Time (Phase Sequence Error): 100 ms
• Reset Behavior: Automatic

Recommendations

For optimal performance, ensure proper installation on a DIN rail and use appropriate screw-type terminals. This relay is a reliable choice for phase sequence monitoring in industrial environments.