Siemens Digital monitoring relay, 1 c/o contact, 17 - 275VAC/DC

Product Overview

Advanced digital voltage monitoring relay designed for comprehensive single-phase AC/DC voltage monitoring with self-powered operation. This SIRIUS 3UG4 series monitoring relay provides reliable detection of voltage overshoot and undershoot conditions across a wide range of 17-275 V AC/DC. The device features digital adjustment capabilities with LCD display, configurable error buffer function, and flexible monitoring modes including overshoot, undershoot, or window monitoring for versatile voltage protection applications.

Key Features

• Digital monitoring relay with LCD display and digital adjustment interface
• Wide voltage range: 17-275 V AC/DC for universal application compatibility
• Self-powered operation eliminates need for auxiliary power supply
• Overshoot and undershoot monitoring with configurable thresholds
• Window monitoring capability for in-range voltage detection
• Adjustable noise pulse delay: 0.1 to 20 seconds
• Wide hysteresis range: 0.1 to 150 V for stable operation
• Configurable error buffer function (with or without)
• Compact 22.5 mm width optimizes control cabinet space
• Removable screw terminals for easy maintenance and pre-wiring

Technical Specifications

• Article Number: 3UG4633-1AL30
• Monitoring Function: Single-phase voltage monitoring (AC/DC)
• Voltage Range: 17...275 V AC/DC
• Power Supply: Self-powered (internal power supply)
• Monitoring Modes: Overshoot, undershoot, window (in-range) monitoring
• Noise Pulse Delay: 0.1 to 20 seconds (adjustable)
• Hysteresis Range: 0.1 to 150 V (adjustable)
• Contact Configuration: 1 changeover contact (SPDT)
• Connection Type: Screw terminal with removable terminals
• Display: LCD with digital adjustment capabilities
• Width: 22.5 mm (DIN rail mounting)
• Net Weight: 0.138 kg
• EAN: 4011209642478
• Country of Origin: Germany

Applications & Use Cases

• System protection from voltage-related damage
• Battery protection against deep discharge conditions
• Voltage-dependent system activation and control
• Critical equipment voltage monitoring and protection
• Power supply quality monitoring in industrial applications
• Automatic system connection based on specified voltage levels
• Voltage threshold monitoring for process control systems
• Equipment protection in variable power quality environments

Advanced Digital Features

• LCD Display: Real-time voltage values and system status indication
• Digital Adjustment: Precise threshold setting eliminates analog potentiometers
• Configurable Error Buffer: Optional fault memory function for diagnostic purposes
• Multiple Monitoring Modes: Selectable overshoot, undershoot, or window monitoring
• Programmable Timing: Adjustable delay and reset behavior for application-specific requirements
• Self-Powered Design: Internal power supply derived from monitored voltage
• Status Display: Real-time indication of actual values and fault conditions

Monitoring Capabilities

• Overshoot Monitoring: Detects voltage levels exceeding upper threshold
• Undershoot Monitoring: Detects voltage levels below lower threshold
• Window Monitoring: Verifies voltage remains within specified range
• AC/DC Compatibility: Monitors both alternating and direct current voltages
• Noise Pulse Filtering: 0.1 to 20 second delay prevents false triggering
• Hysteresis Control: 0.1 to 150 V range prevents contact chatter
• Continuous Monitoring: Real-time voltage assessment with immediate response
• Fault Indication: Clear status display for diagnostic and maintenance purposes

Design & Installation Benefits

• Ultra-compact design at 22.5mm width maximizes cabinet space efficiency
• DIN rail mounting for standard industrial installation
• Removable screw terminals facilitate pre-wiring and field maintenance
• Self-powered operation simplifies installation by eliminating auxiliary power requirements
• Digital interface provides precise and repeatable threshold settings
• LCD display ensures clear visibility of settings and measured values
• Spring-loaded connection system option available for vibration-proof connections
• Standardized accessories compatible across entire SIRIUS relay range

Protection & Control Architecture

• Voltage Range Flexibility: 17-275 V AC/DC accommodates various system voltages
• Multi-Mode Operation: Configurable for overshoot, undershoot, or window monitoring
• Timing Control: Freely parameterizable delay times and reset behavior
• Error Buffer Option: Selectable fault memory for enhanced diagnostics
• Self-Monitoring: Continuous system health verification with status indication
• Reliable Response: Immediate contact switching upon threshold violation
• Universal Compatibility: Suitable for both AC and DC voltage monitoring applications

System Integration

• Worldwide Compatibility: International certifications for global deployment
• Flexible Configuration: Variable adjustment for diverse monitoring requirements
• Process Integration: Contact output enables direct system control and indication
• Diagnostic Capability: Real-time status and fault type display
• Maintenance Support: Removable terminals and accessible adjustment interface
• Application Versatility: Suitable for protection, control, and monitoring functions

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: 27-37-18-01
• eClass 12: 27-37-18-01
• ETIM 9: EC001438
• UNSPSC 15: 39-12-15-21

Download existing graphical data for this product:

• Product Datasheet
• Equipment Manual - SIRIUS 3UG4 / 3RR2 Monitoring Relays
• SIRIUS 3UG4 / 3RR2 Manual
• SIRIUS Voltage Monitoring Documentation
• Product Support Page