Differential IDV IEC61850 Protection Control

Main Features:

  • 87 Differential Unit with through current restraint and harmonic restraint
  • 87/50 Unrestrained Differential Unit
  • 87/50FD Fault Detector
  • External Fault Detector
  • 87N Restricted Earth Fault
  • 50-51 Instantaneous and Time-delayed Phase Overcurrent
  • 50N-51N Instantaneous and Time-delayed Neutral Overcurrent
  • 50Q-51Q Instantaneous and Time-delayed Negative Sequence Overcurrent
  • 50G-51G Instantaneous and Time-delayed Ground Overcurrent (measured ground current)
  • 50HR Instantaneous Phase Overcurrent with Harmonic Restraint for tertiary
  • 50V-51V Instantaneous and Time-delayed Voltage Dependent Overcurrent
  • 67N Neutral Directional (polarized by ground current)
  • 49W Winding Thermal Image
  • 49G Ground Thermal Image
  • 26 Hot-spot Thermal Image
  • 27-59 Phase Under/over voltage
  • 59N-64 Neutral Overvoltage (calculated or measured VN)
  • 81M/m Over/under frequency
  • 81D Rate of Change of the Frequency
  • Load Shedding
  • 59V/Hz Overexcitation
  • 50BF Breaker Failure Protection
  • Cold Load Pick-up
  • 21N Ground Distance Zones
  • 21P Phase Distance Zones
  • 50Sup Phase Overcurrent for Distance Supervision
  • Load Encroachment Detection
  • 60VT Fuse Failure Detector
  • 68 / 78 Power Swing Blocking / Out of Step Tripping
  • 60CT CT Supervision
  • 3 Coil Supervision
  • Breaker Supervision
  • Polarity Inversion
  • Cross blocking type

Related

Literature

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