NPV911
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NPV911

Busbar protection

Voltage and frequency protection, combined with programmable logic functions, make the NPV911 the ideal solution for load shedding and automatic transfer applications. Optional cards (I/O, communication…) are available.

The NPV911 communicates using various protocols, including the IEC 61850 substation communication standard.

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8 frequency stages and 8 setting groups for load shedding
Synchrocheck for up to three circuit breakers
  • 25 — Synchro-check
  • 27 — Undervoltage
  • 47 — Negative sequence overvoltage
  • 50BF — Breaker failure
  • 52 — Breaker failure position
  • 59 — Overvoltage
  • 59N — Zero sequence overvoltage
  • 60 — Voltage balance
  • 74TC — Trip circuit supervision
  • 78 — Loss of synchronism – Vector jump
  • 81O — Overfrequency
  • 81R — Rate of change of frequency – ROCOF
  • 81U — Underfrequency
  • 86 — Locking-out function
  • 99 — Programmable functions and logical editor

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For over 75 years, we have been supporting the energy transition by designing protection and control solutions for electrical networks.

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