Siemens Digital monitoring relay, 3-phase

Product Overview

Advanced digital monitoring relay designed for comprehensive three-phase line voltage monitoring with configurable phase sequence detection capabilities. This SIRIUS 3UG4 series monitoring relay provides dual-channel voltage protection with independent undervoltage (Umin) and overvoltage (Umax) monitoring across a wide voltage range of 160-690 V AC. The device features digital adjustment capabilities with LCD display, fault memory function, and dual independent changeover contacts for enhanced system control and protection.

Key Features

• Digital monitoring relay with LCD display and fault memory
• Comprehensive 3-phase line voltage monitoring capabilities
• Configurable phase sequence monitoring (can be activated/deactivated)
• Phase failure detection with immediate response
• Independent undervoltage (Umin) and overvoltage (Umax) protection
• Wide voltage range: 160-690 V AC for international compatibility
• Adjustable hysteresis: 1-20 V for stable operation
• Independent timing control: 0-20 seconds for both Umin and Umax
• Dual independent changeover contacts for separate control functions

Technical Specifications

• Article Number: 3UG4615-1CR20
• Monitoring Functions: Phase failure, configurable phase sequence, undervoltage, overvoltage
• Supply Voltage Range: 3 x 160...690 V AC
• Frequency Range: 50...60 Hz
• Voltage Monitoring Range: 160-690 V (both Umin and Umax)
• Hysteresis Range: 1-20 V (adjustable)
• Delay Time Range: 0-20 seconds each for Umin and Umax
• Contact Configuration: 2 independent changeover contacts (1 CO for Umin, 1 CO for Umax)
• Connection Type: Screw terminal with removable terminals
• Display: LCD with digital adjustment capabilities
• Width: 22.5 mm (DIN rail mounting)
• Net Weight: 0.146 kg
• EAN: 4011209648326
• Country of Origin: Germany

Applications & Use Cases

• Motor circuit voltage monitoring and protection
• Critical industrial equipment requiring voltage stability
• Three-phase power distribution systems with quality requirements
• Applications requiring independent undervoltage and overvoltage protection
• International installations requiring wide voltage compatibility
• Systems requiring configurable phase sequence monitoring
• Equipment protection against voltage fluctuations and power quality issues

Advanced Digital Features

• LCD Display: Real-time voltage values and system status indication
• Digital Adjustment: Precise threshold setting with digital interface
• Fault Memory: Records and displays fault conditions for diagnostic purposes
• Configurable Phase Sequence: Monitoring can be activated or deactivated as needed
• Independent Channel Control: Separate timing and threshold settings for Umin and Umax
• Self-Powered Operation: No auxiliary voltage required for operation
• Wide Voltage Range: Single device covers multiple international voltage standards

Monitoring Capabilities

• Phase Failure Detection: Immediate detection of any phase loss condition
• Configurable Phase Sequence: Selectable L1-L2-L3 rotation monitoring
• Undervoltage Protection (Umin): Adjustable threshold with independent contact output
• Overvoltage Protection (Umax): Adjustable threshold with independent contact output
• Hysteresis Control: 1-20 V adjustable range prevents contact chatter
• Independent Timing: 0-20 second delay range for each protection function
• Real-Time Display: Continuous monitoring values and fault status indication

Design & Installation Benefits

• Compact 22.5mm width optimizes control cabinet space utilization
• DIN rail mounting for standard industrial installation
• Removable screw terminals facilitate pre-wiring and maintenance
• Digital interface eliminates analog adjustment potentiometers
• LCD display provides clear indication of settings and measured values
• Fault memory assists in troubleshooting and maintenance procedures
• Wide voltage range reduces inventory requirements for global applications

Protection Architecture

• Dual Independent Channels: Separate Umin and Umax monitoring with individual contacts
• Configurable Operation: Phase sequence monitoring can be enabled/disabled
• Precision Control: Digital adjustment ensures accurate threshold setting
• Flexible Timing: Independent delay settings prevent nuisance tripping
• Comprehensive Coverage: Monitors phase failure, sequence, and voltage levels
• Self-Monitoring: Continuous system health verification and fault indication

Compliance & Environmental Information

• RoHS Compliance: Since 01.05.2012
• WEEE Take-Back Obligation: Yes
• REACH Article 33: Contains Lead, Lead monoxide (lead oxide), and 6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol in concentrations higher than 0.1% weight by weight. These substances do not pose risk when used as intended.

Classification Data

• eClass 14: 27-37-18-03
• eClass 12: 27-37-18-03
• ETIM 9: EC001441
• UNSPSC 15: 39-12-15-21

Download existing graphical data for this product:

• Product Datasheet - Technical specifications and connection diagrams
• Equipment Manual - SIRIUS 3UG4 / 3RR2 Monitoring Relays - Comprehensive installation and operation guide
• SIRIUS 3UG4 / 3RR2 Manual - Complete technical documentation and wiring diagrams
• SIRIUS Monitoring Relay Application Guide - Application examples and configuration guidelines
• SIRIUS System Manual - Industrial switchgear integration information