Siemens Analog monitoring relay, screw, 1 c/o contact Part number 3UG4512-1AR20

Product Overview

Analog monitoring relay designed for comprehensive phase failure and sequence monitoring in three-phase power systems. This SIRIUS 3UG4 series monitoring relay provides reliable detection of phase sequence, phase failure, and phase asymmetry conditions across a wide voltage range of 160-690 V AC. The device features screw terminal connections and is specifically engineered for industrial applications requiring robust phase monitoring capabilities.

Key Features

• Phase failure and sequence monitoring functionality
• Wide voltage range: 160-690 V AC for international compatibility
• Phase asymmetry detection for comprehensive system protection
• Self-supplied operation without auxiliary voltage requirement
• Screw terminal connection system with removable terminals
• Compact, slim design optimizes control cabinet space utilization
• International certifications enable worldwide deployment
• Analog adjustment capabilities for precise threshold setting

Technical Specifications

• Article Number: 3UG4512-1AR20
• Monitoring Function: Phase failure, phase sequence, and phase asymmetry
• Supply Voltage Range: 3 x 160...690 V AC
• Frequency Range: 50...60 Hz
• Contact Configuration: 1 change-over contact (SPDT)
• Connection Type: Screw terminal with removable terminals
• Dimensions: 22.5mm (W) x 83mm (H) x 91mm (D)
• Net Weight: 0.119 kg
• EAN: 4011209642249
• Country of Origin: Germany
• Product Series: SIRIUS 3UG4

Applications & Use Cases

• Mobile system monitoring (A/C compressors, refrigerated containers)
• Construction site equipment protection (compressors, cranes)
• Industrial motor protection and control systems
• Three-phase power distribution monitoring
• Critical equipment phase sequence verification
• International installations requiring wide voltage compatibility

Design & Installation Advantages

• Slim profile design reduces space requirements in control cabinets
• Removable terminals facilitate pre-wiring and maintenance procedures
• Wide voltage range eliminates need for different models across regions
• No auxiliary voltage required for operation
• Standardized accessories compatible across entire SIRIUS relay range
• Robust construction suitable for industrial environments

Monitoring Capabilities

• Phase Sequence Detection: Verifies correct L1-L2-L3 rotation order
• Phase Failure Detection: Immediate detection of any phase loss
• Phase Asymmetry Monitoring: Detects unbalanced phase conditions
• Analog Adjustment: Precise threshold setting for specific applications
• Automatic Response: Immediate contact switching upon fault detection
• Wide Operating Range: Suitable for various international power standards

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 System Overview Manual - System integration and compatibility information
• Product Support Page - Additional technical resources and application notes