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GRE Series

The GRE-Series multi-function protection devices have been launched for application in MV networks, drawing on the proven technologies of Toshiba protection and control devices, developed over more than 100 years. This compact, cost-effective device provides a comprehensive range of protection and control functions.

GRE Series


  • Protecting feeders and motors in medium voltage networks.
  • Backup protection for generators, transformers and feeders in high voltage networks.
  • Compact and cost-effective design.
  • Feeder manager device with CB control function, 43R/L switch and comprehensive supporting functions.
  • Elementary, environmentally-friendly, easy to use and enhanced product concepts.


  • Multiple protection relay elements.
  • Local/remote CB control.
  • Automatic supervision and recording functions.
  • Combined 1A/5A CT rating.
  • Wide range auxiliary supply voltage range.
  • DC/AC auxiliary supply.
  • Configurable binary inputs and outputs.
  • Configurable LEDs(function and color).
  • Trip circuit supervision using two binary inputs for high integrity.
  • USB port for local PC connection.
  • Remote communication (IEC61850, IEC60870-5-103, Modbus RTU, DNP3.0).