MRU4 Voltage Protection

The MRU4 is a protection relay which uses the latest Dual-Core-Processor Technology to provide precise and reliable protective functions and is very easy to operate.
It is designed to protect electrical equipment from dangerous voltage fluctuations.
For example protection against under voltages caused by mains shortcircuits, or overvoltages due to load shedding or failure of a generator voltage controller.
Its compact design makes the MRU4 ideal for installation within the LV terminal compartments of compact SF6-insulated MV systems.
The protection functions of the MRU4 have been adapted to comply with the requirements of the VDE-AR-N-4110:2018.

MRU4-2 highPROTEC Series

Part Number: MRU4-2A0AAA

MRU4 Voltage Protection


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Features

  • Wide range power supply: 24 … 270 VDC / 48 … 230 VAC

  • VT measurement from 0 V up to 800 VAC

  • Plausibility verification intelligence

  • Optimized functional overview by hiding unused functions, parameter and assignments

  • On-board testing without removing the wiring

Applications

  • Interconnection of renewable energies (DER – distributed energy resources) to the public grid.

  • Over- / Undervoltage protection.

  • Protection of High, Medium and Low Voltage feeders against overvoltage (insulation damage) and undervoltage.

  • Frequency based protection option, examples:

  • Over-/Underfrequency supervision

  • Load shedding by ROCOF

Downloads

Specification

Name Open
DOK-FLY-MRU4-2D.pdf Open
DOK-FLY-MRU4-2E.pdf Open

Manual

Name Open
MRU4-3.7-DE-MAN_C.pdf Open
MRU4-3.7-EN-MAN_C.pdf Open

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