NG20

Generator protection

Several functions, required for synchronous generators and not self-started synchronous motors are included.


FUNCTIONS


STANDARD PROTECTIVE & CONTROL ELEMENTS

  • Phase overcurrent side H and side L - 50/51
  • Over frequency - 81O
  • Residual Overvoltage - 59N
  • Under frequency - 81U
  • VT Supervision - 74VT
  • Voltage restraint overcurrent - 51V
  • Overvoltage - 59
  • Under Voltage - 27
  • Breaker Failure - BF
  • CT Supervision - 74CT
  • Directional active overpower - 32P
  • Directional active underpower - 37P
  • Loss of Field - 40(M/G)
  • Low impedance restricted earth fault - 64REF
  • Maximum Residual Overcurrent - 50N/51N
  • Minimum Power Factor - 55
  • Negative sequence overcurrent Motor/Generator - 46M, 46G
  • Thermal Image Motor/Generator - 49MG
  • Trip Circuit Supervision - 74TCS

SW PACK OPTIONAL CONFIGURATION

  • Thermal with Pt100 Probes - 26

COMMUNICATION FUNCTIONS

  • One USB Type B local port for communication with ThyVisor setup software

DOWNLOADS

NG20 Coding
Flyer NG20
NG20 Manual
Application note - CT's VT's specification guidelines for NTG-NG20-NVA100X-GD

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