MRU3-2 Voltage Relay

Product detail

Product code:
MRU3
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Product Information

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Documentation (Brochures & Manuals)

General HighTECH Line User Manual

The MRU3-2 is a relay for voltage supervision with universal application, it protects the three-phase network against voltage unbalance or earth faults in isolated networks.

Beside the pure rms value measurement of the line voltage the MRU3-2 evaluates the symmetrical components (positive-, negative- and zero sequence system), so that the MRU3-2 can detect the phase sequence, voltage unbalance and earth-faults.

Benefits and Key Features

  • 19“ racks – fully withdrawable

  • Door mounting – withdrawable and sealable

  • Panel mounting – fully withdrawable

  • Fault / disturbance recorder

  • Intuitive HMI

  • Display (of primary values)

  • Easy setting software – Smart view

  • Compact form factor


Application

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

  • Over- / Undervoltage, residual voltage protection.

  • Unbalance Protection.

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

Inputs and Outputs
Binary inputs 2
Output relays 4
Voltage transformer inputs 3
Watchdog relay 1
Protection ANSI
Voltage protection 27/59
Residual voltage 59N
Phase balance 47
Additional Features
Disturbance recorder
Fault recorder (none volatile)
Parameter sets 2
Communication
Modbus RTU (Option)
RS485 Open Data Protocol (Option)
Mounting Type
Housing is withdrawable
Housing suitable for 19” rack mounting (Option)
Housing suitable for door mounting (Option)
Housing suitable for mounting plate

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