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NPI(D)800 / NPI(D)800R - Digital protection of phase and homopolar current with or without directional criterion

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NPI(D)800 / NPI(D)800R - Digital protection of phase and homopolar current with or without directional criterion

Current Protection
Directional Protection

NPI(D)800 and NPI(D)800R ensures phase and earth overcurrent protection, in medium and high voltage electricity networks against short circuits of all types. This multifunction and directional (D) relay monitors faults between phases or between phase and earth, reverse currents, the thermal state of a piece of equipment, and also the proper functioning of the circuit breaker and its triggering circuit.

These functions associated with an R type modular unit, thus allow the NPI(D)800R to be used for quick replacement, by equivalence of function, of the relays of the CEE relays of the 700 and 7000 series (mechanical interchangeability)

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Product family: 
Cable Arrival / Departure
ANSI code : 
46 - Reversal, loss of phase or unbalance phase
46BC - Broken conductor detection
49 - Thermal overload
50 - Instantaneous overcurrent
50BF - Breaker failure with overcurrent
51 - Overcurrent
51N - Earth fault overcurrent
67 - Phase directional overcurrent
67N - Earth directional overcurrent
74TC - Trip circuit supervision of the breaker
86 - Latching of the output contacts

NPI800 - NPIR800

NPID800 - NPIDR800

NPI800R

NPID800R - NPIDR800R

NP800 - NP800R RANGE


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