MRI4 Feeder Protection

Product detail

Product code:
MRI4
Price
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Product Information

Download Area

Available options

Documentation (Brochures & Manuals)

Operating Software Smart view: Documentation & Setup

Application

The MRI4 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. The MRI4 provides a number of three phase protection elements to safeguard against overcurrent, short-circuit and earth fault, all with inverse time (INV) and definite time (DEFT) tripping characteristics.

The MRI4 is also ideal for the protection of isolated, resonant, resistive and solidly earthed neutral systems. It is designed to be used in both radial networks and single fed open ring main systems. It can also serve as backup protection for differential protection systems on generators, transformers, bus bars and electrical lines. For overhead line protection the MRI4 is also available with an optional auto reclosing function.

The protection functions of the MRI4 have been adapted to comply with the requirements of the VDE-AR-N-4110:2018.

Functional Overview

MRI4 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

KESCO

동일성 선언서 (Declaration of Identity)

  • Complies with IEEE 1547‑2003

  • Amended by IEEE 1547a‑2014

  • Complies with ANSI C37.90‑2005

Key Benefits of the HighPROTEC MRI4

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

  • 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.

  • 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
Binary inputs 8
Current transformer inputs 4
Output relays 5
Watchdog relay 1
Protection ANSI
Time overcurrent protection 50/51
Inrush stabilisation (2nd harmonic)
Earth fault protection 50N/51N
Sensitive EF isolated/compensated 50Ns/51Ns (Option)
Resistance earthed / solidly earthed 50N/51N
Thermal replica 49
Circuit breaker failure protection 50BF
Negative sequence protection 46
Auto reclosing AR 79
Supervision ANSI
Current transformer supervision 60L
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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