🔹 Siemens SIRIUS Phase Failure & Phase Sequence Monitoring Relay – 3UG5616-1CR20 (3UG5 Series)
🔹 Product Description
The Siemens 3UG5616-1CR20 is a advanced digital phase monitoring relay from the Siemens SIRIUS 3UG5 series, designed for comprehensive protection of three-phase electrical systems. It ensures safe operation of motors and industrial equipment by continuously monitoring phase failure, phase sequence, phase imbalance, overvoltage, undervoltage, and frequency variations.
This relay is the successor to the 3UG4 series (including 3UG4616 models) and offers upgraded digital configuration with an LCD display and precise parameter setting, making it highly suitable for modern industrial power distribution systems.
It is widely used in MCC panels, HVAC systems, compressors, pumps, cranes, and renewable energy systems, where stable and correctly sequenced three-phase power is critical for safe motor operation.
The device works by analyzing all three phase voltages (typically 90–690V AC range) and instantly detecting abnormal conditions. When a fault occurs, it triggers output contacts to disconnect or signal the control system, preventing motor damage and system failure.
🔹 Key Features
• Genuine Siemens SIRIUS 3UG5 series monitoring relay
• Model: 3UG5616-1CR20
• Monitors phase failure, phase sequence, and phase asymmetry
• Detects overvoltage and undervoltage conditions
• Frequency monitoring capability (15–70 Hz range)
• Wide voltage range: 90–690V AC (3-phase systems)
• Digital LCD display for easy configuration
• Adjustable thresholds and delay settings
• DIN rail mounting (compact industrial design)
• High reliability for critical industrial applications
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3UG5 |
| Model Number | 3UG5616-1CR20 |
| Product Type | Phase & Voltage Monitoring Relay |
| Function | Phase sequence + phase failure + voltage monitoring |
| Voltage Range | 90 – 690 V AC (3-phase) |
| Frequency Range | 15 – 70 Hz |
| Monitored Conditions | Phase loss, phase sequence, imbalance, over/under voltage |
| Output Contacts | 2 changeover contacts (DPDT) |
| Mounting Type | DIN rail (22.5 mm) |
| Display | LCD digital interface |
| Application | Motor protection / power network monitoring |
| Brand | Siemens |
No reviews yet.