Analog monitoring relay for phase sequence monitoring 3 x 160...260 V AC 50...60 Hz with 2 changeover contacts and screw terminals. Successor product to the network monitoring relay 3UG3511-1BQ50 with fixed function SIRIUS 3UG4 for monitoring phase sequence, failure, and asymmetry, e.g., in mobile installations such as air conditioning compressors, refrigerated containers, construction site compressors, or cranes. Suitable for worldwide use due to international certifications. Various versions allow for application-specific product selection. Reduced space requirement in the control cabinet thanks to a narrow design. All versions are equipped with removable connection terminals. In addition to screw connection technology, the devices are also available with spring-loaded terminals for quick, maintenance-free, and vibration-resistant connections. Variants with a wide voltage range that do not require auxiliary voltage can be used in all networks worldwide. Comprehensive accessories, such as device identification labels, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all cases.