Numerical Current Relay - JNC 066

  • The relay provides over current protection  for power systems. Relay operating  time is determined  by selecting definite time characteristics or one of the four inverse time characteristics i.e. (3s normal inverse, 1.3s normal inverse, 1.5s very inverse and 0.8s extremely inverse).
  • The relay measures the current from each phases and if it exceeds the set threshold, the relay extends a trip signal after an operating time as determined by the selected curve.
  • Its features include: software based design; choice of four curves and definite time; history of 5 latest faults; self supervision facility; wide setting ranges;draw -out case.

  • The relay provides time graded phase and earth fault protection of generators, transformers, feeder, capacitors etc.

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