Analog monitoring relay for phase failure and sequence, 3 x 160...690 V AC, 50...60 Hz, with 2 changeover contacts. The SIRIUS 3UG4 network monitoring relay with fixed function monitors phase sequence, failure, and asymmetry, for example, in mobile installations such as air conditioning compressors, refrigerated containers, construction site compressors, or cranes. It is suitable for worldwide use due to international certifications. Different variants allow for application-specific product selection. The space requirement in the control cabinet is minimal thanks to a narrow design. All versions feature removable connection terminals. In addition to screw connection technology, the devices are also available with spring-loaded connections for quick, maintenance-free, and vibration-resistant connections. Variants with a wide voltage range without auxiliary voltage can be used in all networks worldwide. The comprehensive accessories, such as device labeling plates, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all cases.