The CM-UFD.M31 is a multifunctional grid feeding monitoring relay. It provides different monitoring functions in accordance with VDE-AR-N 4105 and BDEW to detect over- and undervoltage (10-minutes average value, voltage increase and decrease protection) as well as over- and underfrequency (frequency increase and decrease protection).
The ABB CM-UFD.M31 is a multifunctional grid feeding monitoring relay designed to detect over- and undervoltage as well as over- and underfrequency conditions in accordance with VDE-AR-N 4105 and BDEW. It monitors voltage and frequency in single- and three-phase mains (2-wire, 3-wire, or 4-wire AC systems) to ensure safe disconnection of distributed generation from the public grid during faults.
| Rated control supply voltage | 24-240 V AC/DC |
|---|---|
| Measuring range (L-L) | 0-540 V AC |
| Order code | 1SVR 560 730 R3401 |
| Output relays count | 3 c/o (SPDT) contacts |
The device provides monitoring functions in accordance with VDE-AR-N 4105 and BDEW.
No, the monitoring function ROCOF is disabled by default and can be manually enabled in the menu.