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Toshiba Energy Systems & Solutions Corporation

Product/Technical Services

Distance Protection IED GRZ200

Product Overview

The GRZ200 distance protection IED has been designed to provide distance protection and control functions for application to transmission lines and distribution feeders at all voltage levels. The device can be applied to the protection of both long and short lines, parallel lines and underground cables, and can also be used to provide backup protection for generators, transformers and reactors. Optional bay control and monitoring functions are also provided within the flexible and user-friendly GR-200 Series platform.

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Technical Description

Protection functions

  1. Time-stepped distance protection with six independent zones

  2. Command protection distance schemes (PUP, POP, BOP and UOP) and non-directional and directional earth fault schemes (POP, BOP and UOP)

  3. Switch-on-to-fault (SOTF) and stub protection

  4. Power swing blocking

  5. Out-of-step trip protection

  6. Overcurrent guard scheme for distance protection

  7. Circuit breaker failure protection

  8. Non-directional and directional overcurrent protection for phase and earth faults

  9. Non-directional and directional negative phase sequence overcurrent protection

  10. Undercurrent protection

  11. Thermal overload protection

  12. Broken conductor detection

  13. Phase to neutral and phase to phase overvoltage protection

  14. Positive and negative sequence overvoltage protection

  15. Earth fault overvoltage protection

  16. Phase to neutral and phase to phase undervoltage protection

  17. Positive phase sequence undervoltage protection

  18. Under/overfrequency protection

  19. Inrush current detector

  20. Cold load protection

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Control functions

  1. Single-shot (single / three / single + three phase) or multi-shot (three phase) autoreclose

  2. Synchronism voltage check

  3. Circuit breaker and isolator control

  4. Switchgear interlock check

  5. Programmable automatic sequence control

Metering and recording functions

  1. Metering
    - Power system voltages, currents, power, frequency and power factor

  2. Recording
    - Event record
    - Fault record
    - Disturbance record
    - Fault location function

Communication Protocols

  1. IEC 61850 (Ed 1.0 and 2.0) or IEC 60870-5-103 for communication with a Substation Automation System

  2. IEC62439 PRP/HSR/RSTP for communication redundancy

Human interfaces

  1. Selection of HMI: Standard LCD / large LCD

  2. 24 configurable tri-state LEDs selectable red/green/yellow

  3. 7 programmable function keys for user demand operation

  4. Personal computer interface (USB and Ethernet ports)

  5. Monitoring jacks for internal circuit test

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