Solutions   for   Protecting   andManaging   the   Electrical   Network


New generation protection relays

Our know-how in the domain of electrical network protection by static and numerical relays has led to the development of new generations of products that comply with the most demanding quality standards and the most recent technological concepts. One of the results of this expertise is the numerical NP800 relay range.
The NP800 relays provide the protection of people, networks and electric installations and they allow communication with SCADA systems. As well as the usual protection functions of former ranges, the multifunctional NP800 relays provide monitoring, measurement and recording of the network electrical quantities.

Common characteristics for the NP800 range:

  • Auxiliary supply ranges: 19V to 70V or 85V to 255V (AC or DC)
  • 2 setting tables
  • Self-diagnosis: RAM, ROM, EEPROM, output relays, A/D converters, auxiliary supply, monitoring of software execution time
  • Optional I/O extension board (included when directional function is present)
  • Setting, reading, measuring and recording are all available locally or remotely
  • Complies with IEC 60255-4 standard.
  • Monitoring of circuit breaker failure
  • Event recording: 250 events, 10ms resolution
  • 4 disturbance recordings in COMTRADE format


SMARTsoft Configuration software for NP.800 range relays


  Dispositivo ANSI Descrizione
NPG800 21, 24, 27, 32, 37, 40, 46, 49, 50, 51, 50V, 51V, 59, 59N, 64, 81, 50BF, 74TC, 86 Multi function generator protection
NPI800 46, 46BC, 49, 50, 50N, 50BF, 51, 51N, 86, 74TC Phase and Earth Overcurrent Protection
NPID800 46, 46BC, 49, 50, 50N, 50BF, 51, 51N, 67, 67N, 86, 74TC Phase and Earth Overcurrent Protection with directional criteria
NPIH800 50N, 50NBF, 51N, 86, 74TC Earth Overcurrent Relay
NPIHD800 50N, 50NBF, 51N, 67N, 86, 74TC Earth Overcurrent Relay with directional criteria
NPU800 27, 27P, 47, 59, 59N, 74TC, 81, 86 Voltage and Frequency Relay
NPUH800 59N, 86, 74TC Residual Overvoltage Relay (Neutral Displacement Relay)
NPM800 37I, 46, 48, 49, 5/49, 50, 50BF, 51LR, 51N, 66, 86, 74TC Multi function motor protection
25, step up transformer adaptation Generator Synchro-check relay
25, 90, step up transformer adaptation Automatic synchronizer device for up to 4 generators
25 + network managment
Network Check Synchronizing Relay
NPW800 32, 37, 27, 59, 59N, 55, 81, 86, 74TC, BF Multi function power, voltage and frequency protection


  Document Lang. Ref. Index
General presentation NP800 & NP800R Series EN A449 F
Application Guide NP800 & NP800R Series EN A331 J
Fixing and Dimensions NP800 EN / FR D37739 H