Siemens Analog monitoring relay, screw, 160 - 690V

Product Overview

Advanced analog monitoring relay designed for comprehensive three-phase power system protection, featuring phase failure and sequence monitoring with adjustable undervoltage detection capabilities. This SIRIUS 3UG4 series monitoring relay provides multi-functional protection including phase sequence verification, phase failure detection, and customizable undervoltage monitoring across a wide voltage range of 160-690 V AC. The device incorporates fixed 20% asymmetry detection and dual changeover contacts for enhanced system reliability.

Key Features

• Multi-functional monitoring: phase failure, sequence, and adjustable undervoltage
• Wide voltage range: 160-690 V AC for international compatibility
• Fixed asymmetry detection at 20% threshold for unbalanced load protection
• Adjustable undervoltage monitoring with customizable threshold settings
• Fixed 5% hysteresis for stable operation and contact chatter prevention
• Adjustable delay time: 0-20 seconds for application-specific timing requirements
• Dual changeover contacts (2 SPDT) for comprehensive control capabilities
• Self-powered operation without auxiliary voltage requirement

Technical Specifications

• Article Number: 3UG4513-1BR20
• Monitoring Functions: Phase failure, phase sequence, adjustable undervoltage, asymmetry detection
• Supply Voltage Range: 3 x 160...690 V AC
• Frequency Range: 50...60 Hz
• Asymmetry Detection: 20% fixed threshold
• Hysteresis: 5% fixed
• Delay Time Range: 0-20 seconds (adjustable)
• Contact Configuration: 2 changeover contacts (2 SPDT)
• Connection Type: Screw terminal with removable terminals
• Dimensions: 22.5mm (W) x 92mm (H) x 91mm (D)
• Net Weight: 0.145 kg
• EAN: 4011209642263
• Country of Origin: Germany

Applications & Use Cases

• Mobile system protection (A/C compressors, refrigerated containers)
• Construction site equipment monitoring (compressors, cranes)
• Critical industrial motor protection requiring voltage stability
• Three-phase power distribution systems with voltage quality requirements
• International installations requiring wide voltage compatibility
• Applications requiring both phase monitoring and undervoltage protection

Advanced Monitoring Capabilities

• Phase Sequence Detection: Verifies correct L1-L2-L3 rotation order
• Phase Failure Detection: Immediate detection of any phase loss condition
• Adjustable Undervoltage Monitoring: Customizable threshold for voltage drop protection
• Fixed Asymmetry Detection: 20% threshold for unbalanced phase protection
• Hysteresis Control: 5% fixed hysteresis prevents contact chatter
• Timing Control: Adjustable 0-20 second delay prevents nuisance tripping
• Dual Contact Output: Two independent changeover contacts for complex control schemes

Design & Installation Benefits

• Slim profile design (22.5mm width) optimizes control cabinet space
• Removable screw terminals facilitate pre-wiring and maintenance
• Self-powered operation eliminates need for auxiliary supply
• Wide voltage range accommodates various international power standards
• Closed-circuit principle ensures fail-safe operation
• Analog adjustment capabilities for precise threshold setting
• Snap-on mounting for quick installation and replacement

Protection Features

• Multi-Level Protection: Combined phase, sequence, and voltage monitoring
• Undervoltage Adjustment: Customizable voltage drop threshold setting
• Fixed Asymmetry Protection: 20% unbalance detection prevents motor damage
• Timing Flexibility: 0-20 second delay range accommodates various applications
• Dual Output Capability: Two changeover contacts for comprehensive control
• International Certification: Worldwide use approval for global deployment

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
• Product Support Page - Additional technical resources and troubleshooting information