The Siemens 3UG5616-1CR20 is a next-generation universal monitoring relay designed for enhanced electrical protection in 3-phase systems. It integrates multiple monitoring functions including phase failure, incorrect phase sequence, phase asymmetry, frequency deviation, and over/undervoltage detection. This makes it ideal for demanding industrial environments where power quality and reliability are critical. With flexible parameter settings, LED status indicators, and fast trip response, it helps prevent system faults and protects sensitive equipment from damage. Its DIN rail-compatible design ensures easy integration into control cabinets. ⚙️ Technical Specifications (EN): Part Number: 3UG5616-1CR20 Function: Multifunction relay (phase failure, sequence, asymmetry, frequency, voltage monitoring) System Type: 3-phase systems Voltage Monitoring Range: Configurable (typically 3×400 V AC) Frequency Monitoring: Yes (e.g., 50/60 Hz detection) Phase Asymmetry Monitoring: Yes Mounting Type: DIN rail Output Contacts: 1 changeover (SPDT) Response Time: Fast response to faults Indication: LED indicators for operational and fault status Application: Advanced industrial protection and monitoring Standards Compliance: IEC/EN 60255, IEC/EN 60947-5-1