over-voltage monitoring relay / under-voltage / frequency / DIN rail
CM-UFD.M22 ABB

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Characteristics

  • Measured/monitored value:

    over-voltage, under-voltage, frequency

  • Other characteristics:

    DIN rail, multifunction

Description

The CM-UFD.M22 is a multifunctional grid feeding monitoring relay. It provides different monitoring functions in accordance with CEI 0-21 to detect over- and undervoltage (10-minutes average value,voltage increase and decrease protection) as well as any changes in grid frequency (frequency increase and decrease protection).
The device is connected between the distributed generation and the public grid in order to disconnect the distributed generation in case of problems (e.g. unstable grid), faults or maintenance on the grid. Additionaly monitoring of ROCOF (rate of change of frequency) can be configured.