CM-UFD.M31 Grid Feeding Monitoring Relay Data Sheet

This data sheet describes the ABB CM-UFD.M31 and CM-UFD.M31M multifunctional grid feeding monitoring relays, which monitor voltage and frequency to disconnect distributed generation from the public grid during faults or instability. The relays comply with German standards VDE-AR-N 4105, 4110, 4120 and Austrian TOR Erzeuger standards, and include features such as ROCOF monitoring, vector shift detection, Modbus RTU communication, and integrated redundancy management.