Analog monitoring relay for phase sequence monitoring 3 x 160...260 V AC 50...60 Hz with 1 changeover contact and spring-loaded technology. The SIRIUS 3UG4 network monitoring relay monitors phase sequence, failure, and asymmetry, for example, in mobile installations such as air conditioning compressors, refrigerated containers, construction site compressors, or cranes. Worldwide use is ensured by international certifications. Different variants allow for application-specific product selection. Reduced space requirement in the control cabinet 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 a quick, maintenance-free, and vibration-resistant connection. Variants with a wide voltage range that do not require auxiliary voltage can be used in all power grids around the world. 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.