Monitoring relay phase failure, phase sequence and asymmetry monitoring 3x 160-690 V AC, 15-70 Hz 1 changeover contact screw connection Network monitoring relay with fixed function SIRIUS 3UG5 for monitoring phase sequence, failure and asymmetry, e.g. in mobile systems such as air conditioning compressors, refrigerated containers, construction site compressors, cranes or solar and wind power plants. Worldwide use thanks to international certificates. Less space required in the control cabinet thanks to a narrow width. All versions with 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-proof connection. Versions with a wide voltage range without auxiliary voltage can be used in all networks in the world. In addition, devices with SIL 1/PL c certification are available. The comprehensive range of accessories, such as device identification plates, replacement terminals and sealing covers, is standard for all relays. The 3UG5 network monitoring relays replace the proven 3UG4 series. SIRIUS relays - a program for all situations.