Analog monitoring relay for phase sequence monitoring 3 x 320...500 V AC 50...60 Hz with 1 changeover contact and spring-loaded technology. The SIRIUS 3UG4 network monitoring relay with fixed function monitors phase sequence, failure, and asymmetry, for example, in mobile applications such as air conditioning compressors, refrigerated containers, construction site compressors, or cranes. It is suitable for global use due to international certifications. Various versions allow for application-specific product selection. The space requirement in the control cabinet is minimal thanks to the narrow design. All versions feature removable connection terminals. In addition to screw connection technology, the devices are also available with continuous 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 power networks worldwide. The comprehensive accessories, such as device identification labels, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all cases.