The Siemens SIRIUS 3UG5514-1BR20 is a high-precision phase monitoring relay engineered for the reliable supervision of 3-phase electrical networks. This device is designed to detect critical power anomalies, including phase failure, incorrect phase sequence, phase asymmetry, and undervoltage conditions. By continuously monitoring these parameters, the relay helps prevent damage to sensitive industrial equipment and ensures the stability of electrical systems across a wide operating voltage range of 160-690V AC and a frequency range of 15-70Hz.
Advantages
This monitoring relay offers significant benefits for industrial automation and infrastructure management. Its compact, slim design optimizes space within control cabinets, making it an ideal choice for modern electrical installations. The device features analog adjustment capabilities, allowing for precise configuration to meet specific operational requirements. Furthermore, it is built for global versatility, supported by international certifications that allow for deployment in diverse geographic regions. The inclusion of two changeover (2CO) contacts provides flexible switching options for various control circuits, while the robust screw terminals ensure a secure and durable electrical connection.
Suitable for
- Monitoring mobile systems such as air conditioning compressors and refrigerated containers
- Protection of construction site compressors and heavy-duty cranes
- Electrical supervision in photovoltaic systems and wind turbines
- General industrial motor protection and network monitoring
This relay may not be suitable for applications requiring DC voltage monitoring, as it is specifically designed for 3-phase AC networks. Additionally, it should not be used in environments where the electrical noise or vibration levels exceed the specified technical ratings of the device, as this could lead to false tripping or premature wear.
Key specifications
- Operating voltage: 3-phase 160-690V AC
- Frequency range: 15-70Hz
- Monitoring functions: Phase failure, phase sequence, phase asymmetry, and undervoltage
- Output contacts: 2 changeover (2CO) contacts
- Connection type: Screw terminals
- Design: Slim profile for space-saving cabinet mounting
Installation should be performed by qualified personnel in accordance with local electrical regulations. The relay is mounted on a standard DIN rail within a control cabinet. After mounting, the desired monitoring parameters are set using the analog controls on the front of the device. Once configured, the input phases are connected to the designated terminals, and the output contacts are integrated into the control circuit to trigger an alarm or shut down the system in the event of a fault.
What to consider before purchase
- Verify that the supply voltage of your 3-phase network falls within the 160-690V AC range
- Ensure the frequency of your system is between 15-70Hz
- Check if your control circuit requires 2CO contacts for your specific logic
- Confirm that the screw terminal connection type meets your installation standards
For optimal performance and longevity, it is recommended to periodically inspect the terminal connections for tightness and ensure the device is kept free from excessive dust or moisture within the control cabinet.
