Analog adjustable monitoring relay for phase failure, phase sequence, asymmetry, and undervoltage monitoring. Suitable for 3x 160-690 V AC, 15-70 Hz with 2 changeover contacts and screw terminals. The analog adjustable network monitoring relay SIRIUS 3UG5 monitors phase sequence, failure, and asymmetry as well as undervoltage, for example, in mobile installations such as air conditioning compressors, refrigerated containers, construction site compressors, cranes, or solar and wind power plants. It is globally applicable due to international certifications. The space requirement in the control cabinet is reduced thanks to the narrow design. All versions come with removable terminal blocks. In addition to screw terminal technology, the devices are also available with spring-loaded terminals for a quick, maintenance-free, and vibration-resistant connection. Variants with a wide voltage range without auxiliary voltage can be used in all power grids worldwide. The comprehensive accessories, such as device labeling plates, replacement terminals, and sealing covers, are uniform for all relays. The network monitoring relays 3UG5 replace the proven series 3UG4. SIRIUS relays - a program for all cases.