MRU4 Voltage Protection

Product detail

Product code:
MRU4
Price
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Product Information

Download Area

Available options

Documentation (Brochures & Manuals)

Operating Software Smart view: Documentation & Setup

Application

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.

Functional Overview

MRU4 Functional Overview

Approvals

UL File Nr.: E217753

certified regarding UL508 (Industrial Controls)

CSA File Nr.: 251990

certified regarding CSA-C22.2 No. 14 (Industrial Controls)

EAC

certified by EAC (Eurasian Conformity)

KEMA

Type tested (and certified) regarding IEC 60255‑1 and regarding IEC 61850

TÜV Nord, VDE-AR-N 4110 (2018-11), VDE-AR-N 4120 (2018-11)

Component certificate regarding the German grid code standard VDE-AR-N 4110 (2018-11)

Component certificate regarding the German grid code standard VDE-AR-N 4120 (2018-11)

KESCO

동일성 선언서 (Declaration of Identity)

  • Complies with IEEE 1547‑2003

  • Amended by IEEE 1547a‑2014

  • Complies with ANSI C37.90‑2005

  • Complies with “Engineering Recommendation G99 Issue 1 Amendment 6 – March 2020”

Key Benefits of the HighPROTEC MRU4

  • 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

  • Menu Languages supported: English, German, Spanish, Portuguese, French, Russian, Polish, Romanian


Application

  • 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

Inputs and Outputs
Binary inputs 8
Output relays 5
Voltage transformer inputs 4
Watchdog relay 1
Protection ANSI
Voltage protection 27/59
Circuit breaker failure protection 50BF
Residual voltage 59N
Phase balance 47
Frequency protection 810/81U
Frequency gradient 81
Vector surge / mains decoupling 78V
Supervision ANSI
Voltage transformer supervision 60FL
Trip circuit resp. control circuit supervision 74TC
Additional Features
Control and detection of switchgears
Control and supervision of a circuit breaker
Disturbance recorder
Event recorder
Fault recorder (none volatile)
Parameter sets 4
Programmable Logic
Communication
DNP3 RTU (Option)
DNP3 TCP (Option)
IEC 60870-5-103 (Option)
IEC 60870-5-104 (Option)
IEC 61850 (Option)
IRIG-B00X
Modbus (TCP) (Option)
Modbus RTU (Option)
Profibus DP (Option)
Mounting Type
Housing suitable for 19” rack mounting (Option)
Housing suitable for door mounting

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