MRA4 Directional Feeder Protection

Product detail

Product code:
MRA4
Price
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Product Information

Download Area

Available options

Documentation (Brochures & Manuals)

Operating Software Smart view: Documentation & Setup

Application

The MRA4 is a high precision and reliable protection and control relay. The intuitive setting concept with plausibility test enables reliable and time optimized configuration of the extensive protection function to a variety of applications such as incoming or outgoing feeder protection, network protection and generator protection.

In fact, the MRA4 is our interconnection and mains decoupling expert.

The implemented switchgear management guaranties an efficient and safe control and supervision.

The device is a bench mark in flexibility and usability and offers various communication options. The hardware is designed for all nominal values in combination with protection and control functionality.

The parameterizing and analyzing software Smart view is usable for each HighPROTEC device and free of charge.

Functional Overview

MRA4 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)

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 MRA4

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

  • VT measurement from 0 V up to 800 VAC (300 VAC for some order options)

  • CT measurement always with 1 A and 5 A

  • 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 thermal damages by overload or short circuit currents.

  • 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

  • Auto reclosure option to fix short duration faults (like bird flying through overhead lines, ice on lines, lightning’s hitting overhead lines, wind caused arcing by on overhead lines.

Inputs and Outputs
Analog inputs 0 (2)
Analog outputs 0 (2)
Binary inputs 8 (24)
Current transformer inputs 4
Output relays 6 (19)
Voltage transformer inputs 4
Watchdog relay 1
Protection ANSI
Voltage protection 27/59
Time overcurrent protection 50/51
Inrush stabilisation (2nd harmonic)
Directional time overcurrent protection 67
Earth fault protection 50N/51N
Sensitive EF isolated/compensated 50Ns/51Ns (Option)
Resistance earthed / solidly earthed 50N/51N
Earth fault directional feature 67N
Thermal replica 49
Circuit breaker failure protection 50BF
Residual voltage 59N
Phase balance 47
Frequency protection 810/81U
Frequency gradient 81
Vector surge / mains decoupling 78V
Power direction 32/37
Negative sequence protection 46
Q->&V< QV
Auto reclosing AR 79
Supervision ANSI
Current transformer supervision 60L
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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