frequency monitoring relay / voltage / single-phase / three-phase
CM-UFD.M31 ABB

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Characteristics

  • Measured/monitored value:

    frequency, voltage

  • Other characteristics:

    single-phase, three-phase

Description

The grid feeding monitoring relay CM-UFD.M31 monitors voltage and frequency in single- and three-phase grids. In connection with alternating-current converters with integrated isolated grid detection it protects grids and applications according to VDE-AR-N 4105. Furthermore CM-UFD.M31 provides a monitoring of the connected section switches, vector shift detection and ROCOF (Rate Of Change Of Frequency).