Siemens 3UG5616-1CR20 Network Monitoring Relay, 24 V AC/DC, 3-Phase Voltage Monitoring, LCD Display, DIN Rail

The Siemens 3UG5616-1CR20 is a versatile network monitoring relay designed for reliable 3-phase voltage monitoring in industrial applications. It detects undervoltage, overvoltage, asymmetry, phase sequence, and phase failure, ensuring the protection of connected equipment. With a compact 45 mm width and DIN rail mounting, it integrates seamlessly into control cabinets.

Advantages

This monitoring relay offers comprehensive protection with adjustable thresholds for undervoltage, overvoltage, and asymmetry. The integrated LCD display provides clear readouts of actual values and fault messages, simplifying diagnostics. Its wide measuring voltage range (L-L: 160-690 V AC, L-N: 95-400 V AC) and dual supply voltage (24 V AC/DC) make it suitable for diverse installations.

Suitable for

• Industrial motor protection
• Generator monitoring
• Power distribution systems
• HVAC equipment
• Any application requiring reliable 3-phase voltage supervision

Key specifications

• Monitoring functions: 3-phase voltage (undervoltage, overvoltage, asymmetry), phase sequence, phase failure
• Supply voltage: 24 V AC/DC
• Measuring voltage range (L-L): 3 AC 160-690 V
• Measuring voltage range (L-N): 3 AC 95-400 V
• Frequency: 50/60 Hz
• Contacts: 2 change-over (2 CO / 2 SPDT)
• Contact rating (AC-15): 3 A at 250 V AC
• Connection: Screw terminals
• Width: 45 mm
• Mounting: DIN rail
• Display: LCD
• Adjustable: Undervoltage, overvoltage, asymmetry thresholds; ON-delay and OFF-delay
• Operating temperature: -25 to +60 °C
• Protection class: Front IP40, terminals IP20

Recommendations

For optimal performance, ensure the supply voltage is stable and within the specified range. Use appropriate fuses or circuit breakers upstream. The relay is designed for indoor use only.