Siemens has launched a new generation of line monitoring relays. The new Sirius 3UG5 line monitoring relays provide high protection for mobile machinery and equipment or in the event of unstable grids. This ensures that grid and voltage faults can be detected and reported at an early stage before major subsequent damage occurs. Creeping changes that indicate a need for maintenance, for example, are recorded as well. In order to react flexibly to short-term disturbances such as voltage dips or load changes, the monitoring relays have adjustable delay times. This avoids unnecessary alarms and shutdowns while increasing system availability.
Compared to the industry standard, the new Sirius 3UG5 series can operate over a significantly wider frequency range – from 15 to 70 Hz. For unstable grids, it is also possible to specify the frequency to be monitored. This extends the range of possible applications. In addition, the devices can be used behind frequency converters.
The IO-Link open communication standard enables the transmission and evaluation of measured values and trends in the controller or in higher-level systems. IO-Link devices can be parameterized from a PC via the TIA portal. By saving the parameters, replaced devices are parameterized automatically.
The Sirius 3UG5 line monitoring relays have functional safety certification in accordance with the SIL 1 (IEC 62061) and PL c (EN ISO 13849-1) standards and are suitable for use in a wide range of applications.