Digital adjustable monitoring relay for phase failure, phase sequence, asymmetry, frequency, as well as over- and undervoltage monitoring of 3x 90-690 V AC, 15-70 Hz. It features 2 changeover contacts with screw terminals. The digitally adjustable network monitoring relay SIRIUS 3UG5 monitors phase sequence, failure, and asymmetry, undervoltage and overvoltage, as well as frequency, for example in unstable networks or 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 its wide voltage supply and international certifications. The relay can be variably set for overstepping, undershooting, or window monitoring. Delay times and RESET behavior are freely parameterizable. The space requirement in the control cabinet is low thanks to its narrow design. Reliable diagnostics are provided through the display of actual values and types of network faults. All versions come with removable connection terminals. In addition to screw connection technology, the devices are also available with spring-loaded terminals for a quick, maintenance-free, and vibration-resistant connection. An automatic rotation direction correction is available upon request. A variant with IO-Link is available for communication connectivity. Additionally, devices with SIL 1/PL c certification are available. The comprehensive accessories, such as device identification labels, 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.