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 MR 4 have been adapted to comply with the requirements of the VDE-AR-N-4110: 2023-09.
Feature highlights
All Inclusive:
- All protection features without extra charge
- Parameter setting and evaluationsoftware
- Disturbance record analysis software
Six Elements phase overcurrent protection
- Non-directional overcurrent/short circuit protection (DMT/IMDT)
- Tripping characteristics: DEFT ANSI: MINV VINV, EINV IEC: NINV, VINV, LINV, EINV Thermal Flat, IT, I2T, I4T
Four Elements Earth Fault Protection
- Non-directional earth fault protection (DEFT/INV)
- Tripping characteristics: DEFT ANSI: MINV, VINV, EINV IEC: NINV, VINV, LINV, EINV Thermal Flat, IT, I2T, I4T RXIDG
Power Quality
- THD protection
Demand Management/Peak Values
- Current (peak values) and average current
Supervision
- Current transformer supervision
- Circuit breaker failure protection
- Trip circuit supervision
- Cold load pickup
- Switch onto fault
Temperature Protection
- 2 Elements Unbalanced Load Protection
- Automatic reclosing
- Inrush
- Thermal replica
- Plausibility checks
- Adaptive parameter sets
- Status display
- Comprehensive RMS and DFT measured values and statistics
- Masking of unused functions
- Multi-Password-Level
Control
- 1 breaker
- Breaker wear
Recorders
- Disturbance recorder: 120 s non volatile
- Fault recorder: 20 faults non volatile
- Event recorder: 300 events non volatile
- Trend recorder: 4000 non volatile entries
PC Tools
- Setting and analyzing software Smart view free of charge
- Including page editor to design own Control pages
- SCADApter to re-assign datapoints for Retrofit projects: Modbus, Profibus, IEC 60870-5-103/ -104
Logic
- Up to 80 logic equations for protection, control and monitoring
Commissioning Support
- USB connection
- Customizable Display (Single-Line)
- Customizable Inserts
- Copy and compare parameter sets
- Configuration files are convertible
- Forcing and disarming of output relays
- Fault simulator: current, voltage
- Graphical display of tripping characteristics
- 8 languages selectable within the relay
Communication Options
- IEC 61850
- Profibus DP
- Modbus RTU and/or Modbus TCP
- IEC 60870-5-103
- EC 60870-5-104
- DNP 3.0 (RTU, TCP, UDP)
- SCADApter
- Redundant Ethernet: Two Ethernet channels available on the device [Electrical Ethernet [RJ45]
or Optical Ethernet [FO] - fiber optic cable]
- Switch-Mode [Redundancy with RSTP]
- PRP - Parallel Redundancy Protocol
- HSR - High-Availability Seamless Redundancy Protocol
Cyber Security
- Menu for the activation of security settings (e. g. hardening of interfaces)
- Security Logger
- Centralized Security Logs (Syslog)
- Encrypted Connection Smart view Device
- Device specific certificates (No man in the middle attacks)
Time Synchronisation
- SNTP, IRIG-BOOX, Moabus, DNP 3.0, IEC 60870-5-103/-104
Technical Specs
Connections (Example)
certified regarding CSA-C22.2 No. 14
(Industrial Controls)
Type tested and certified by KEMA Laboratories in accordance with the complete type test requirements of IEC 60255‑1:2009.
certified by EAC
(Eurasian Conformity)
certified regarding UL508
(Industrial Controls)
CE certified
VDE FNN compliant
Download
PDF files
All essential
HighPROTEC MRI4
information such as Broschures or User Manuals etc. are available in our download section.
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