HighPROTEC MRDT4

All Inclusive:

• All protection features without extra charge
• Parameter setting and evaluationsoftware
• Disturbance record analysis software

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Transformer Phase Differential Protection

• Stabilized phase differential protection with transients and C.T. saturation detection
• Various selectable transformer groups Zero sequence removal

• Three point slope characteristic
• High set element (non-restraint)

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Two Elements Ground Differential Protection

• Three point slope characteristic
• High set element (non-restraint)

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Backup Protection

• 4 Elements Overcurrent/short-circuit protection (non-directional)
• 4 Elements Earth fault protection (non directio-nal)
• Tripping characteristics:
 DEFT
 ANSI: NINV, VINV, EINV,
 IEC: NINV, VINV, LINV, EINV, RXIDG
 Thermal Flat, IT, I2T, I4T
• Two Elements Unbalanced Load Protection

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Comprehensive Measured
Values and Statistics

• THD (total harmonic distortion)
• Current phasors and angles
• RMS and fundamental
• Sequence currents
• Differential currents

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Temperature Protection

• Thermal replica
• Buchholz (sudden pressure), ext. oil temperature, and aux. temperature protection via digital input
• Temperature measurement via external RTD-box (option)

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Supervision

• Current transformer supervision
• Circuit breaker failure protection
• Trip circuit supervision
• Cold load pickup
• Switch onto fault

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Control

• 2 breakers (or isolators / grounding switches
• 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

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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

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Logic

• Up to 80 logic equations for protection, control and monitoring

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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

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Communication Options

• IEC 61850
• Profibus DP
• Modbus RTU and/or Modbus TCP
• IEC 60870-5-103
• IEC 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]
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  • PRP - Parallel Redundancy Protocol

  • HSR - High-Availability Seamless Redundancy Protocol

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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)

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Time Synchronisation

• SNTP, IRIG-BOOX, Modbus, DNP 3.0 
IEC 60870-5-103/-104